Relevant bibliographies by topics / Potentiodynamic polarization measurement / Journal articles

Journal articles on the topic 'Potentiodynamic polarization measurement'

To see the other types of publications on this topic, follow the link: Potentiodynamic polarization measurement.
Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Potentiodynamic polarization measurement.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Saunders, Ivan. "Facilitating potentiodynamic anodic polarization measurement in corrosion testing." Anti-Corrosion Methods and Materials 43, no. 3 (March 1996): 21–25. http://dx.doi.org/10.1108/eb007393.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zhou, Hu, and Janine Mauzeroll. "Using High Field Model to Interpret Potentiodynamic Polarization Curves of AA7075 at High Scan Rates." ECS Meeting Abstracts MA2022-01, no. 16 (July 7, 2022): 1001. http://dx.doi.org/10.1149/ma2022-01161001mtgabs.

Full text
Abstract:
The drastic distortion of potentiodynamic polarization curves measured at high potential scan rates prevents the extraction of accurate kinetic parameters. By measuring potentiodynamic polarization curves of AA7075 at scan rates ranging from 0.167 mV/s to 100 mV/s, in an acidic solution of 0.62 M NaH2PO4 and a near-neutral 3.5 wt% NaCl solution, changes in potentiodynamic polarization curves are observed not only at different scan rates and electrolytes but also between replicated experiments. Contrary to what was reported in previous studies, the disturbance of charging current associated with high scan rates does not satisfactorily explain the potentiodynamic polarization shape. Instead, the high field model that incorporates the kinetics of anodic oxide growth successfully captures the features of experimental potentiodynamic polarization curves. Compared to Tafel’s theory, the high field model explains remarkably both the changing kinetics with scan rates, electrolytes, and the variance between the measurement performed at different sites. Figure 1
APA, Harvard, Vancouver, ISO, and other styles
3

Nofrizal, Nofrizal. "Gambir Extract As A Corrosion Inhibitor For Mild Steel In Acidic Solution." Scientific Contributions Oil and Gas 35, no. 3 (March 10, 2022): 139–45. http://dx.doi.org/10.29017/scog.35.3.786.

Full text
Abstract:
The inhibition infl uence of Gambir extract in 1M Hidrocloric Medium on corrosion of mild steel in acidic solution was studied by weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM method. It is believed that the phenolic compounds that contained in the Gambir extract in 1 M Hidrocloric medium to be responsible for the inhibition. The corrosion studies shows that Gambir extract gives an anodic type of inhibition and best at the concentration of 150 ppm. The inhibition effi ciency for weight loss measurement, potentiodynamic polarization measurement, and electrochemical impedance spectroscopy were 76.52, 88.28 and 66.27% respectively. SEM analysis shows that the morphology of inhibited mild steel was improved compared with uninhibited mild steel.
APA, Harvard, Vancouver, ISO, and other styles
4

Liu, Yun, Zhi Dang, Yin Xu, and Tianyuan Xu. "Pyrite Passivation by Triethylenetetramine: An Electrochemical Study." Journal of Analytical Methods in Chemistry 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/387124.

Full text
Abstract:
The potential of triethylenetetramine (TETA) to inhibit the oxidation of pyrite in H2SO4solution had been investigated by using the open-circuit potential (OCP), cyclic voltammetry (CV), potentiodynamic polarization, and electrochemical impedance (EIS), respectively. Experimental results indicate that TETA is an efficient coating agent in preventing the oxidation of pyrite and that the inhibition efficiency is more pronounced with the increase of TETA. The data from potentiodynamic polarization show that the inhibition efficiency (η%) increases from 42.08% to 80.98% with the concentration of TETA increasing from 1% to 5%. These results are consistent with the measurement of EIS (43.09% to 82.55%). The information obtained from potentiodynamic polarization also displays that the TETA is a kind of mixed type inhibitor.
APA, Harvard, Vancouver, ISO, and other styles
5

Li, Song Song, Wei He, Zhi Hua Tao, and Shou Xu Wang. "Electrochemical Investigation of Triadimenol as Corrosion Inhibitor for Copper in 0.5mol/L H2SO4 Solution." Advanced Materials Research 830 (October 2013): 81–85. http://dx.doi.org/10.4028/www.scientific.net/amr.830.81.

Full text
Abstract:
This paper chose triadimenol as a corrosion inhibitor of copper in 0.5mol/L sulfuric acid. The properties of corrosion inhibition were investigated by the polarization measurement and electrochemical impedance spectroscopy (EIS). Polarization curves showed that both cathodic and anodic processes of copper corrosion were suppressed. The inhibiting efficiency increased as the increment of the inhibitor concentration and reached 86.7% at 50 mg/L. The results obtained from EIS measurements are in line with that obtained from potentiodynamic polarization. Finally, a mechanism of inhibition is proposed and discussed.
APA, Harvard, Vancouver, ISO, and other styles
6

Sebastian, Divine, Chun-Wei Yao, Lutfun Nipa, Ian Lian, and Gary Twu. "Corrosion Behavior and Mechanical Properties of a Nanocomposite Superhydrophobic Coating." Coatings 11, no. 6 (May 29, 2021): 652. http://dx.doi.org/10.3390/coatings11060652.

Full text
Abstract:
In this work, a mechanically durable anticorrosion superhydrophobic coating is developed using a nanocomposite coating solution composed of silica nanoparticles and epoxy resin. The nanocomposite coating developed was tested for its superhydrophobic behavior using goniometry; surface morphology using scanning electron microscopy and atomic force microscopy; elemental composition using energy dispersive X-ray spectroscopy; corrosion resistance using atomic force microscopy; and potentiodynamic polarization measurements. The nanocomposite coating possesses hierarchical micro/nanostructures, according to the scanning electron microscopy images, and the presence of such structures was further confirmed by the atomic force microscopy images. The developed nanocomposite coating was found to be highly superhydrophobic as well as corrosion resistant, according to the results from static contact angle measurement and potentiodynamic polarization measurement, respectively. The abrasion resistance and mechanical durability of the nanocomposite coating were studied by abrasion tests, and the mechanical properties such as reduced modulus and Berkovich hardness were evaluated with the aid of nanoindentation tests.
APA, Harvard, Vancouver, ISO, and other styles
7

Liang, Xiao Feng, and Xue Yang. "Corrosion Inhibition of 2-Mercaptobenzothiazole for Carbon Steel in Sulfuric Acid Solution." Advanced Materials Research 557-559 (July 2012): 92–95. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.92.

Full text
Abstract:
The inhibition effect of 2-Mercaptobenzothiazole (2-MB) against the corrosion of carbon steel in sulfuric acid solution was studied by weight loss measurement and electrochemical measurements(potentiodynamic polarization techniques). The results show that 2-MB acts as a good corrosion inhibitor in sulfuric acid solution. Adsorption of 2-MB is found to obey Langmuir isotherm. Polarization curves indicate 2-MB is a mixed-type inhibitor. The effects of temperature and sulfuric acid concentration were also studied.
APA, Harvard, Vancouver, ISO, and other styles
8

Parajuli, Davilal, Srijana Sharma, Hari Bhakta Oli, Dilip Singh Bohara, Deval Prasad Bhattarai, Arjun Prasad Tiwari, and Amar Prasad Yadav. "Comparative Study of Corrosion Inhibition Efficacy of Alkaloid Extract of Artemesia vulgaris and Solanum tuberosum in Mild Steel Samples in 1 M Sulphuric Acid." Electrochem 3, no. 3 (July 29, 2022): 416–33. http://dx.doi.org/10.3390/electrochem3030029.

Full text
Abstract:
Two different types of alkaloids are successfully extracted from two plants Artemisia vulgaris (AV) and Solanum tuberosum (ST) in the laboratory and used as corrosion inhibitors for mild steel samples. The corrosion inhibition potential of these alkaloids is determined by weight loss and potentiodynamic polarization measurement methods. Based on the weight loss measurement study of a sample immersed for 6 h in 1000 ppm inhibitor solution of AV and ST alkaloids, the corrosion inhibition efficiency is found to be 92.58% and 90.79%, respectively. The potentiodynamic polarization measurement shows 88.06% and 83.22% corrosion inhibition efficiency for AV and ST alkaloids, respectively, for the sample immersed for 1 h in 1000 ppm inhibitor solution. These promising efficiency and suitable immersion time effect can lead to the development of good green inhibitors.
APA, Harvard, Vancouver, ISO, and other styles
9

Moghanni-Bavil-Olyaei, Hamed, and Jalal Arjomandi. "Enhanced electrochemical performance of Al–0.9Mg–1Zn–0.1Mn–0.05Bi–0.02In fabricated from commercially pure aluminum for use as the anode of alkaline batteries." RSC Advances 6, no. 33 (2016): 28055–62. http://dx.doi.org/10.1039/c6ra02113a.

Full text
Abstract:
The electrochemical performance of Al–0.9Mg–1Zn–0.1Mn–0.05Bi–0.02In (wt%) from commercially pure aluminum has been determined using open circuit potential–time measurement, galvanostatic discharge, potentiodynamic polarization and electrochemical impedance spectroscopy.
APA, Harvard, Vancouver, ISO, and other styles
10

Vrsalović, Ladislav, Emeka Emmanuel Oguzie, Mirko Gojić, Stjepan Kožuh, Ivana Ivanić, Lana Terzić, and Senka Gudić. "Intergranular Corrosion of Cu-Al-Ni Alloy in 0.5 mol dm−3 H2SO4 Solution." Kemija u industriji 69, no. 9-10 (2020): 457–64. http://dx.doi.org/10.15255/kui.2020.022.

Full text
Abstract:
The corrosion behaviour of Cu-Al-Ni alloy in 0.5 mol dm–3 H2SO4 solution was investigated by electrochemical methods including open circuit potential measurement, electrochemical impedance spectroscopy measurements, linear and potentiodynamic polarization. Measurements were performed in 0.5 mol dm–3 H2SO4 at temperatures 20 and 40 °C. After polarization testing, corroded electrode surfaces were ultrasonically cleaned in deionized water and examined by light and scanning electron microscopy, while the elemental composition at individual points of the alloy surface was determined by EDS analysis. The results of the investigations revealed the occurrence of intergranular corrosion on the Cu-Al-Ni surface, which became more pronounced with increasing temperature.
APA, Harvard, Vancouver, ISO, and other styles
11

Gapsari, Femiana, Rudy Soenoko, Agus Suprapto, and Wahyono Suprapto. "Bee Wax Propolis Extract as Eco-Friendly Corrosion Inhibitors for 304SS in Sulfuric Acid." International Journal of Corrosion 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/567202.

Full text
Abstract:
The inhibition properties of bee wax propolis (BWP) extract on the 304SS in 0.5 M sulfuric acid were conducted using potentiodynamic polarization, EIS, and XRD. Quercetin (2-(3.4-dihydroxy phenyl)-3.5.7-trihydroxy-4H-chromen-4-one) was identified as the main compound in the BWP extract based on FTIR and HPLC analysis. The results showed that the inhibitor could retard the corrosion rate of 304SS in 0.5 M sulfuric acid which reached 97.29% and 91.42% at 2000 ppm based on potentiodynamic polarization and EIS measurement, respectively. The inhibition efficiency decreased with increasing temperature. The inhibition mechanism of BWP extract on the 304SS was physisorption and obeyed Temkin adsorption isotherm equation. The thin protective layer on the 304SS surface was confirmed by XRD.
APA, Harvard, Vancouver, ISO, and other styles
12

Mohanty, Udit Surya, and Kwang-Lung Lin. "Potentiodynamic Polarization Measurement of Sn–8.5Zn–XAl–0.5Ga Alloy in 3.5% NaCl Solution." Journal of The Electrochemical Society 153, no. 8 (2006): B319. http://dx.doi.org/10.1149/1.2209569.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Zhang, Lei, Sheng Tao Zhang, and Xiao Li. "Electrochemical and Quantum Chemical Investigations of Tinidazole as Corrosion Inhibitor for Mild Steel in 3% HCl Solution." Advanced Materials Research 194-196 (February 2011): 157–64. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.157.

Full text
Abstract:
The inhibition effect of tinidozole on the corrosion of mild steel in 3% HCl solution has been investigated through weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and quantum chemical calculations methods. The results show that tinidazole is an effective inhibitor for mild steel corrosion in HCl solution, and that the inhibition efficiency reaches a maximum value of 62% at the concentration of 400mg/L. Polarization measurement suggests that the tinidozole acts as mixed-type inhibitor. The Langmuir adsorption isotherm is proposed to interpret the interaction for the inhibitor molecule on metal surface. Furthermore, the quantum chemical calculation reveals that the adsorption of tinidozole is mainly concentrated around the imidazole ring.
APA, Harvard, Vancouver, ISO, and other styles
14

Xie, Bin, Chuan Lai, Li Ke Zou, Xiang Mei Zeng, Chun Huang, Ni Zeng, and Yan Mei Wang. "Adsorption Behavior and Inhibition of N,N-Diethylammonium O,O'-Dicyclohexydithiophosphate for Carbon Steel in Acid Medium." Advanced Materials Research 239-242 (May 2011): 347–51. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.347.

Full text
Abstract:
The inhibition effect of N,N-diethylammonium O,O'-dicyclohexyldithiophosphate(NOCP) against the corrosion of carbon steel in HCl solution was studied by weight loss measurement, potentiodynamic polarization and atomic force microscopy techniques. The studies of weight loss measurement show that the inhibition efficiency was up to 99.54 % at the inhibitor concentration of 2.717×10-4 M in 1.0 M HCl solution at 25°C. The adsorption of NOCP on carbon steel surface obeys the Langmuir isotherm. Polarization curves indicate NOCP is a mixed-type inhibitor, and the obtained standard free energy of adsorption suggests that the chemisorption takes place spontaneously. The effects of temperature, acid concentration and immersion time were also studied.
APA, Harvard, Vancouver, ISO, and other styles
15

Nwanonenyi, Simeon C., Okoro Ogbobe, and Emeka Emmanuel Oguzie. "Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch." International Journal of Engineering and Technologies 10 (March 2017): 11–21. http://dx.doi.org/10.18052/www.scipress.com/ijet.10.11.

Full text
Abstract:
The corrosion of mild steel in 0.5 M H2SO4acid solution and the inhibition process by wheat starch (WS) was investigated using weight loss and potentiodynamic polarization measurement techniques respectively. Gravimetric results revealed that there is significant reduction in the corrosion rate of mild steel in the presence of inhibited solution compared to blank solution, and also the inhibition efficiency was found to depend on the concentration of the WS. Data on potentiodynamic polarization results confirmed that WS exhibited mixed type inhibition behaviour, though the cathodic effect was more pronounced. The mode of WS adsorption on the corroding metal surface followed Langmuir isotherm model. In addition, the trend of inhibition efficiency with temperature, activation energy and heat of adsorption parameters revealed a strong interaction between the WS constituents and the corroding metal surface, thus indicating that WS lowered the corrosion process by blanketing the mild steel surface through chemical adsorption mechanism. The mechanism of inhibition was discussed in the light of the chemical structure of starch.
APA, Harvard, Vancouver, ISO, and other styles
16

Nwanonenyi, Simeon C., Okoro Ogbobe, and Emeka Emmanuel Oguzie. "Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch." International Journal of Engineering and Technologies 10 (March 28, 2017): 11–21. http://dx.doi.org/10.56431/p-u8z69a.

Full text
Abstract:
The corrosion of mild steel in 0.5 M H2SO4 acid solution and the inhibition process by wheat starch (WS) was investigated using weight loss and potentiodynamic polarization measurement techniques respectively. Gravimetric results revealed that there is significant reduction in the corrosion rate of mild steel in the presence of inhibited solution compared to blank solution, and also the inhibition efficiency was found to depend on the concentration of the WS. Data on potentiodynamic polarization results confirmed that WS exhibited mixed type inhibition behaviour, though the cathodic effect was more pronounced. The mode of WS adsorption on the corroding metal surface followed Langmuir isotherm model. In addition, the trend of inhibition efficiency with temperature, activation energy and heat of adsorption parameters revealed a strong interaction between the WS constituents and the corroding metal surface, thus indicating that WS lowered the corrosion process by blanketing the mild steel surface through chemical adsorption mechanism. The mechanism of inhibition was discussed in the light of the chemical structure of starch.
APA, Harvard, Vancouver, ISO, and other styles
17

Fayomi, Ojo Sunday Isaac, J. Akpoborie, Omotayo Sanni, J. Ren, Wan B. Wan Nik, J. A. Oyebanji, K. M. Oluwasegun, J. O. Ojediran, and F. Zulkifli. "Stress Corrosion Cracking and the Effects of <i>Citrus x aurantiifolia</i> on Mild Steel - A Green Approach." Key Engineering Materials 917 (April 13, 2022): 116–34. http://dx.doi.org/10.4028/p-2ok39h.

Full text
Abstract:
The inhibition performance of citrus x aurantiifolia extract (CXA) on the corrosion of mild steel in 1.5 M H2SO4, 2 M H2SO4, 3 M H2SO4, and 4 M H2SO4 solutions was evaluated by weight loss, potentiodynamic polarization techniques, and scanning electron spectroscopy equipped with energy-dispersive X-ray spectroscopy. CXA inhibited the mild steel corrosion in the sulphuric acid solutionswith optimal inhibition results of 96.06% in 1.5 M H2SO4 and 86.57% in 4 M H2SO4 from weight loss measurement. Weight loss, potentiodynamic polarization, and scanning electron microscopy tests confirm the inhibitive performance of this compound and the increase in inhibitor efficiency increases with inhibitor concentration. The polarization data showed that the inhibitor acts as a mixed-type inhibitor, and fits the Langmuir adsorption isotherm. The adsorption studies clarify the excellent adsorption of this compound on the mild steel surface. The inhibited steel in the acid solution displayed improved surface morphology due to the surface protection effect of CXA molecules. The citrus x aurantiifolia studied here easily mitigates the effect of stress corrosion cracking on mild steel in a sulphuric acid environment. Keywords: Mild steel, Stress corrosion, Adsorption, Corrosion inhibitor, Sulphuric acid, Citrus X Aurantiifolia
APA, Harvard, Vancouver, ISO, and other styles
18

Zou, Li Ke, Chuan Lai, Bin Xie, Xue Yang, Zhen Xiang, Ni Zeng, Chun Huang, and Yang Mei Wang. "Adsorption Behavior and Corrosion Inhibition of EPP for Q235 Steel in H2SO4 Solution." Advanced Materials Research 287-290 (July 2011): 2923–26. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2923.

Full text
Abstract:
The inhibition effect of N,N-diethylammonium O,O'-di(2-phenylethyl)dithiophosphate (EPP, [NH2(Et)2][S2P(OCH2CH2Ph)2]2) against the corrosion of Q235 steel in H2SO4solution was studied by weight loss measurement, potentiodynamic polarization and SEM(scanning electron microscope) techniques. The results show that EPP acts as an excellent corrosion inhibitor in 5% H2SO4by suppressing simultaneously the cathodic and anodic processes via chemical adsorption on Q235 steel surface, which complies with the Langmuir adsorption isotherm. Polarization curves indicate EPP is a mixed-type inhibitor. The effects of temperature, acid concentration and immersion time were also studied.
APA, Harvard, Vancouver, ISO, and other styles
19

ASAAD, MOHAMMAD ALI, MOHAMMAD ISMAIL, PANDIAN BOTHI RAJA, and NUR HAFIZAH A. KHALID. "RHIZOPHORA APICULATA AS ECO-FRIENDLY INHIBITOR AGAINST MILD STEEL CORROSION IN 1 M HCL." Surface Review and Letters 24, Supp01 (October 31, 2017): 1850013. http://dx.doi.org/10.1142/s0218625x18500130.

Full text
Abstract:
The inhibitive characteristics of aqueous extracts from mangrove (Rhizophora apiculata) bark and leaf on the corrosion of mild steel (MS) coupon in 1 M HCl were examined by means of the gravimetric measurement (weight loss), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The MS surface morphologie were investigated using field emission scanning electron microscopy (FESEM) with Energy Dispersive X-Ray Analysis (EDX) at 120[Formula: see text]h in the presence and absence of green inhibitors in corrosive medium. Respective inhibition efficiencies of 68.1% and 59.0% were obtained when exposed to 10% v/v Rhizophora apiculata solution for 72[Formula: see text]h. Examination of the adsorption behavior of the solutions indicated the Langmuir isotherm model as being the most likely relevant adsorption mechanism. In addition, polarization measurements showed that both bark and leaves extract inhibitors act via mixed type inhibition.
APA, Harvard, Vancouver, ISO, and other styles
20

Guerrero, Jan-Ervin C., Drexel H. Camacho, Omid Mokhtari, and Hiroshi Nishikawa. "Corrosion and Leaching Behaviours of Sn-0.7Cu-0.05Ni Lead-Free Solder in 3.5 wt.% NaCl Solution." International Journal of Corrosion 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/6580750.

Full text
Abstract:
The corrosion and leaching behaviour of a new ternary Sn-0.7Cu-0.05Ni alloy in 3.5 wt.% NaCl solution is reported herein. Potentiodynamic polarization measurements show that Sn-0.7Cu-0.05Ni has the highest corrosion rate. Results of the 30-day Sn leaching measurement show that Sn-Cu-Ni joint has slight decrease attributed to the formation of thin passivation film after 15 days. The leaching amounts of Sn are observed to be higher in solder joint than in solder alloy due to the galvanic corrosion happening on the surface. EDS and XRD results of the corroded surface confirm that the corroded product is made up of oxides of tin.
APA, Harvard, Vancouver, ISO, and other styles
21

TAHRAOUI, L., M. DIAFI, A. AIDI, and B. BENHAOUA. "CHROMIUM-RICH Zn–Cr ALLOYS: ELECTROCHEMICAL DEPOSITION, STRUCTURE AND CORROSION RESISTANCE." Digest Journal of Nanomaterials and Biostructures 16, no. 1 (January 2021): 191–96. http://dx.doi.org/10.15251/djnb.2021.161.191.

Full text
Abstract:
In this work we have done an experimental study of Zinc-Chromium composite coatings. For this the influence of the Chromium concentration was the principal object in order to improve the resistance of the corrosion of the coatings, which has been made by electroplating on steel substrates previously treated, have been studied by several characterization methods, as the Xray diffraction, micro-hardness measurement and scanning electron microscopy (SEM), protection against corrosion properties studied by potentiodynamic polarization measurements (Tafel) . the addition of Cr in the Zn alloys increases the micro-hardness, XRD and SEM results and identify any coatings Zn-Cr alloy composition reveals that zinc phase.
APA, Harvard, Vancouver, ISO, and other styles
22

Lizarazo-Ávila, Pedro Javier, Rodolfo Rodríguez-Baracaldo, and Jhon Jairo Olaya-Flórez. "Corrosion resistance of bainitic steels alloyed with boron." Respuestas 25, no. 1 (January 1, 2020): 78–88. http://dx.doi.org/10.22463/0122820x.2410.

Full text
Abstract:
Due to its good combination of properties and its wide range of application in the automotive and rail sector, among others, banitic steels have been studied by modifying their chemical composition using different alloys in order to improve their resistance, as is the case of boron, which is an element that allows to increase the mechanical properties of steel and its behavior against phenomena such as wear when is used in small quantities. In the present investigation, through of saline chamber and potentiodynamic polarization tests, the influence of boron was studied in steels with bainitic microstructure against phenomena as corrosion by varying its percentage in each sample analyzed, which was developed from the measurement of parameters such as the percentage of corroded area and the current density. Although no significant influence of boron was observed in the saline chamber results, in potentiodynamic polarization, a greater reduction in current density was observed for steel with a higher boron content, which results in a better resistance to corrosion compared to other steels that had a lower percentage of this element.
APA, Harvard, Vancouver, ISO, and other styles
23

Sunada, Satoshi, Takahisa Yamamoto, and Kazuhiko Majima. "Electrochemical Properties of Type 304 Stainless Steels Produced by Several Methods." Materials Science Forum 539-543 (March 2007): 3225–30. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3225.

Full text
Abstract:
Three kinds of Type 304 stainless steels: the first one was made by the conventional wrought process (I/M), the second one by conventional powder metallurgy process (P/M) and the third one by Metal Injection Molding process (MIM), were used. The corrosion behavior of these specimens was investigated through the potentiodynamic polarization curve measurement and electrochemical impedance spectroscopy method. In addition, SCC characteristics were also studied. Both the potentiodynamic polarization curve and the Nyquist plot curve of MIM specimen were similar to those of I/M specimen, but different from those of P/M specimens. Therefore it might be suggested that MIM process is quite suitable to improve the corrosion resistance. On the other hand, time constants of P/M and MIM specimens are similar, but they differed remarkably from that of I/M specimen, which is considered to be due to the remained pores in P/M and MIM specimens. Further, it was also confirmed that the SCC was more liable to take place on I/M specimen than MIM specimen.
APA, Harvard, Vancouver, ISO, and other styles
24

Loto, Cleophas Akintoye, and Roland Tolulope Loto. "Potassium Gluconate Inhibition of α-Brass Corrosion in 1 M HNO3." Oriental Journal of Chemistry 35, no. 2 (March 25, 2019): 523–30. http://dx.doi.org/10.13005/ojc/350203.

Full text
Abstract:
Potassium gluconate inhibition effects of α-brass corrosion immersed in 1 M HNO3 were studied at room temperature (25°C). Gravimetric and potentiodynamic polarization measurement techniques were used separately for the experimental investigation. A Digi-Ivy potentiostat, connected to computer for data acquisition and analyses was used for the potentiodynamic polarization experiments. The observed potassium gluconate’s corrosion inhibition increased as the inhibitor concentration increased up to 3.5g/200ml HNO3 where a 0.7224g weight loss was recorded in comparison with the experiment without added inhibitor which had a 3.582g weight loss at 312 hours. The corresponding corrosion rate at 3.5g/200ml HNO3 concentration was 4.93 mm/yr while the uninhibited (control) experiment recorded a 20.33 mm/yr at 288 hrs. Corrosion inhibition efficiency values for the 1.5, 3, 3.5 and 4g/200ml HNO3 concentrations are respectively 16.99, 41.77, 79.86 and 64.53%. Other parameters recorded include: polarization resistance, Ω (3.20E+01); corrosion rate (19.15 mm/yr) and current density, 1.01E-03 Acm-2 for the 3.5g/200ml HNO3 concentration in HNO3 test medium were also achieved. A mixed type inhibitor was indicated with the recorded results of ba and bc. Adsorption isotherm showed that inhibitor protection mechanism followed both the Frumkin and the Freundlich models more than the Langmuir isotherm model.
APA, Harvard, Vancouver, ISO, and other styles
25

Isa, M. C., M. Y. Ahmad, Abdul Razak Daud, and M. Daud. "The Effect of Sn on the Impedance Behaviour of Al-Zn Alloys in Natural Chloride Solution." Key Engineering Materials 442 (June 2010): 322–29. http://dx.doi.org/10.4028/www.scientific.net/kem.442.322.

Full text
Abstract:
Electrochemical behaviour of cast Al-Zn alloys in natural chloride solution were investigated by potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). Results from open circuit potential (OCP) measurement against immersion time showed a stable free corrosion process was achieved after 15 kiloseconds and alloys with more Sn contents had shifted OCP value towards more negative direction. Potentiodynamic polarisation curves showed that the corrosion potential (Ecorr) of aluminium alloys with Sn addition were much active compared to alloy without Sn. The anodic curves were characterized by no sign of passive current due active dissolution on the surface of the Al-Zn-Sn alloy. SEM images show that the presence of Sn in Al-Zn alloys produces better and uniform dissolution morphology. EIS results confirm that the presence of Sn is beneficial in improving anodic dissolution of Al-Zn alloys by reducing resistance to polarization (Rp). The presence of 0.1%wt. Sn in Al-Zn alloy has been found to be useful in activating electrochemical reaction at alloy-solution interface based on inductive loop in EIS diagram.
APA, Harvard, Vancouver, ISO, and other styles
26

Rosley, Rozainita, Suzi Salwah Jikan, Nur Azam Badarulzaman, Fahmiruddin Esa, Siti Noraiza Ab Razak, Muhammad Sufi Roslan, and Munira Khalid. "Effect of Complexing Agent on The Morphology and Corrosion Effect of Cu-Sn-Zn Ternary Alloy via Electroplating." Key Engineering Materials 908 (January 28, 2022): 598–604. http://dx.doi.org/10.4028/p-7f1iu5.

Full text
Abstract:
Copper-tin-zinc (Cu-Sn-Zn) ternary alloy coatings was successfully deposited from a less hazardous electrolyte containing copper (II) chloride, tin (II) chloride, zinc chloride, sodium hypophosphite and complexing agent. In this work, the impact of different complexing agent on morphology, chemical composition, current efficiency, microhardness, and corrosion rate were investigated by method of SEM equipped with EDX spectroscopy, weight gain measurements, XRD, Vickers microhardness test and potentiodynamic polarization measurement, respectively. It was discovered that, Cu-Sn-Zn alloys prepared using sodium formate shows the highest microhardness value. It is also can be concluded that, complexing agent have a significant impact on the appearance and the surface morphology of the Cu-Sn-Zn alloy electrodeposits.
APA, Harvard, Vancouver, ISO, and other styles
27

Mohd Nazeri, Muhammad Firdaus, Muhamad Zamri Yahaya, Ali Gursel, Fakhrozi Cheani, Mohamad Najmi Masri, and Ahmad Azmin Mohamad. "Corrosion characterization of Sn-Zn solder: a review." Soldering & Surface Mount Technology 31, no. 1 (February 18, 2019): 52–67. http://dx.doi.org/10.1108/ssmt-05-2018-0013.

Full text
Abstract:
PurposeThe purpose of this paper is to review and examine three of the most common corrosion characterization techniques specifically on Sn-Zn solders. The discussion will highlight the configurations and recent developments on each of the compiled characterization techniques of potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy (EIS).Design/methodology/approachThe approach will incorporate a literature review of previous works related to the experimental setups and common parameters.FindingsThe potentiostatic polarization, potentiodynamic polarization and EIS were found to provide crucial and vital information on the corrosion properties of Sn-Zn solders. Accordingly, this solder relies heavily on the amount of Zn available because of the inability to produce the intermetallic compound in between the elements. Further, the excellent mechanical properties and low melting temperature of the Sn-Zn solder is undeniable, however, the limitations regarding corrosion resistance present opportunities in furthering research in this field to identify improvements. This is to ensure that the corrosion performance can be aligned with the outstanding mechanical properties. The review also identified and summarized the advantages, recent trends and important findings in this field.Originality/valueThe unique challenges and future research directions regarding corrosion measurement in Sn-Zn solders were shown to highlight the rarely discussed risks and problems in the reliability of lead-free soldering. Many prior reviews have been undertaken of the Sn-Zn system, but limited studies have investigated the corrosive properties. Therefore, this review focuses on the corrosive characterizations of the Sn-Zn alloy system.
APA, Harvard, Vancouver, ISO, and other styles
28

Xi, Jian Jun, Jun Zhao, Zhi Gang Wang, Chun Ping Zhao, and Mei Ping Xue. "Study of Copper Electroplating Films Made by Four Power Modes and Magnetic Field on 20# Steel." Applied Mechanics and Materials 528 (February 2014): 14–18. http://dx.doi.org/10.4028/www.scientific.net/amm.528.14.

Full text
Abstract:
Copper electroplating films were prepared on 20# steel by four different power modes which are direct current plating, single polar pulse plating, bipolar pulse plating and bipolar pulse plating with magnetic field. The electrochemical performance was investigated in 3.5% NaCl solution by means of potentiodynamic polarization measurement. The morphology and micro structure were characterized by scanning electron microscope and X-ray diffraction. It is proved that the magnetic field is responsible for the improvement of the performance of copper electroplating films.
APA, Harvard, Vancouver, ISO, and other styles
29

Neena, P. K., N. Poongothai, and P. R. Abhirami. "Efficiency of Alstonia schoalris Leaves on Mild Steel in Acid Medium as Pickling Inhibitor." Asian Journal of Chemistry 31, no. 12 (November 16, 2019): 2745–52. http://dx.doi.org/10.14233/ajchem.2019.22184.

Full text
Abstract:
This work aims to find the inhibition efficiency of Alstonia schoalris leaves on mild steel in 1N HCl medium. Corrosion monitoring was done using weight loss method, potentiodynamic polarization studies like Tafel and impedance studies and the results shows that the inhibitor acts well on mild steel in acidic medium. Polarization studies show that the inhibitor behaves like a mixed type. The inhibitor was characterized using FTIR which showed the presence of hetero atoms in the inhibitor molecule that get adsorbed on metal surface and provided better efficiency and that was proven by different adsorption isotherm. Zeta potential showed the stability of particle in the medium. Surface analysis of specimen was studied using FESEM, EDX and contact angle measurements. The analysis showed that the surface exposed to inhibitor is less corroded and contact angle measurement showed hydrophilic nature of the surface. Here, the inhibition is attributed to the electrostatic interaction of active sites on metal and inhibitor.
APA, Harvard, Vancouver, ISO, and other styles
30

SENTHILKUMAR, A. N., K. THARINI, and M. G. SETHURAMAN. "CORROSION INHIBITORY EFFECT OF FEW PIPERIDIN-4-ONE OXIMES ON MILD STEEL IN HYDROCHLORIC ACID MEDIUM." Surface Review and Letters 16, no. 01 (February 2009): 141–47. http://dx.doi.org/10.1142/s0218625x09012408.

Full text
Abstract:
Three piperidin-4-one oxime derivatives viz. 3,5-dimethyl-2,6-diphenyl-piperidin-4-one oxime (DDPO), 3-ethyl-2,6-diphenyl-piperidin-4-one oxime (EDPO), and 1-methyl-3-isopropyl-2, 6-diphenyl-piperidin-4-one oxime (MIDPO) were synthesized. Corrosion inhibiting ability of these compounds in 1 M HCl was studied using weight loss study, potentiodynamic polarization measurements, electrochemical impedance spectroscopy, XRD and SEM with EDS measurements. Weight loss studies revealed that all the three oximes are good corrosion inhibitors. The order of inhibiting ability of these compounds is as follows: DDPO > EDPO > MINDO. Results of the polarization measurement showed that these inhibitors do not alter the mechanism of either hydrogen evolution or mild steel dissolution reaction, proving the mixed mode of inhibition. At constant acid concentration, increase of inhibitor concentration increased the charge transfer resistance (R ct ), complimented with decrease of double layer capacitance (C dl ), thereby indicating the increase of percentage inhibition efficiency. XRD and SEM with EDS analysis provided strong proof for the existence of inhibitor film over the mild steel surface.
APA, Harvard, Vancouver, ISO, and other styles
31

Qin, Runzhi, Yanxia Du, Zhenchang Xu, and Minxu Lu. "Anodic Polarization Behavior of X80 Steel in Na2SO4 Solution under High Potential and Current Density Conditions." Materials 12, no. 3 (January 27, 2019): 394. http://dx.doi.org/10.3390/ma12030394.

Full text
Abstract:
X80 steel has great risk of corrosion in high voltage direct current (HVDC) interference cases. In this study, the anodic polarization behavior of X80 steel under high potential and current density in Na2SO4 solution was investigated. The I × R drop was eliminated using current interrupt technique during the potentiodynamic measurement. Therefore, the real polarization curve was obtained. The corrosion behavior was investigated by galvanostatic polarization, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results show a new form of passivation route. The steel dissolved actively below −0.388 VSCE, then became partly passivated from −0.388 to 1.448 VSCE, and fully passivated above 1.448 VSCE. The passive film was formed containing Fe2O3 and FeOOH, and resistant to SO42− ions. It not only blocked the direct dissolution of steel, but also facilitated oxygen evolution. The corrosion rates of steel samples decreased after the passivation.
APA, Harvard, Vancouver, ISO, and other styles
32

Li, Jun, Dong Ye, Yong Mei Chen, Jie Su, and Kun Yu Zhao. "Effect of Chloric Ions and Temperature on the Pitting Corrosion Behavior of Supermartensitic Stainless Steel in CO2-Saturated Chloride Solution." Advanced Materials Research 538-541 (June 2012): 2342–45. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2342.

Full text
Abstract:
Abstract. The pitting corrosion behavior of two kinds (W and Cu-free; W and Cu-bearing) of supermartensitic stainless steels (SMSS) were studied in CO2-saturated chloride solution with three chloric ion concentration: 21200, 50000, 100000ppm, and four different temperatures:19, 40, 60, 80°C by potentiodynamic polarization measurement. The results indicate that the pitting potential decreased with temperature increasing, and in a logarithmic relation with the chlorine concentration in both alloys. The pitting potential of supermartensitic stainless steel is increased by together adding tungsten and copper.
APA, Harvard, Vancouver, ISO, and other styles
33

Sherif, El-Sayed M., Sameh A. Ragab, and Hany S. Abdo. "Role of Vanadium Additions on the Corrosion Mitigation of Ti-6Al-xV Alloy in Simulated Body Fluid." Metals 10, no. 7 (July 6, 2020): 903. http://dx.doi.org/10.3390/met10070903.

Full text
Abstract:
The manufacturing of different Ti-6Al-xV (x = 2, 4, 6, and 8 wt.%) alloys using a mechanical alloying technique was reported. The corrosion behaviors of these newly fabricated alloys after 1, 24, and 48 h exposure to a simulated body fluid (SBF) were assessed using cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, and chronoamperometric measurements. Surface morphology and elemental analyses after corrosion for 48 h in SBF were reported using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) examinations. An X-ray diffraction investigation characterized the phase analyses. All results indicated that the increase of V content significantly decreases both uniform and pitting corrosion. This effect also increases with prolonging the immersion time to 48 h before measurement.
APA, Harvard, Vancouver, ISO, and other styles
34

Tolulope Loto, Roland. "Data on the Microstructure and Passivation Behavior for NO7718 and NO7208 Nickel Alloys in Corrosive Media." Oriental Journal of Chemistry 34, no. 5 (October 11, 2018): 2435–39. http://dx.doi.org/10.13005/ojc/340527.

Full text
Abstract:
Potentiodynamic polarization data for nickel alloys N07718 and N07208 in 2M H2SO4 solution at 0% - 5% NaCl concentrations are presented in tabular form showing the qualitative relationship between the corrosion resistance, passivation behavior and interfacial redox reactions of the alloys with the increase in chloride ion concentration. Tafel plots from the polarization test are presented to show the anodic-cathodic transition curves with respect to variable applied potential and scan rate. Data on open circuit potential measurement for the 1200s showed the active-passive behavior of both alloys and their thermodynamic stability in the acid solution. Optical micro-analytical images of the alloys before corrosion and at 0%, 0.5% and 5% NaCl after corrosion are presented for morphological and comparative analysis.
APA, Harvard, Vancouver, ISO, and other styles
35

Li, Dan Dan, Jian Jun Hao, Yue Jin Ma, Liang Gao, and Jian Guo Zhao. "Study on the Corrosion Resistance of Ti(CN) Composites Coating." Applied Mechanics and Materials 341-342 (July 2013): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.88.

Full text
Abstract:
Metal composites coating of Ti (CN) was made on the surface of Q235 steel substrate by reaction nitrogen are welding cladding process, and potted with low temperature epoxy, di-n-butyl phthalate and T31, the mass ratio was 10:2:1.5. To evaluate the corrosion resistance of Ti (CN) coating, the specimens were immersed in 5% sulfuric acid and 3.5% sodium chloride to calculate corrosion rate by potentiodynamic polarization measurement. The corrosion resistance of Ti (CN) is improved by 3.45 times in 5% sulfuric acid and 4.39 times in3.5% sodium chloride.
APA, Harvard, Vancouver, ISO, and other styles
36

Tian, Lin Hai, Er Qiang Liu, Ai Lan Fan, Lin Qin, Dao Xin Liu, Bin Tang, and Jun De Pan. "Effect of TiN/CrN Multilayer Coating by Cathodic Arc Deposition on Wear and Corrosion Behaviours of AZ91D Magnesium Alloy." Materials Science Forum 610-613 (January 2009): 870–73. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.870.

Full text
Abstract:
TiN/CrN multilayer coating was deposited on AZ91D magnesium alloy by pulsed bias cathodic arc PVD process. Effects of the coating on wear and corrosion behaviours of magnesium alloy were investigated. The stick-tearing for adhesion evaluation, nanoindentation for hardness measurement, ball-on-disc testing for wear tests, and potentiodynamic polarization for corrosion tests were used. The results show that the friction coefficient is decreased and the wear resistance is improved remarkably by TiN/CrN multilayer coating on AZ91D magnesium alloy. The corrosion resistance of the alloy is increased at a certain degree.
APA, Harvard, Vancouver, ISO, and other styles
37

Ganash, Aisha. "Anticorrosive Properties of Poly(o-phenylenediamine)/ZnO Nanocomposites Coated Stainless Steel." Journal of Nanomaterials 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/540276.

Full text
Abstract:
Poly(o-phenylenediamine) and poly(o-phenylenediamine)/ZnO (PoPd/ZnO) nanocomposites coating were prepared on type-304 austenitic stainless steel (SS) using H2SO4acid as electrolyte by potentiostatic methods. Fourier transforms infrared spectroscopy and scanning electron microscopy techniques were used to characterize the composition and structure of PoPd/ZnO nanocomposites. The corrosion protection of polymer coatings ability was studied byEocp-time measurement, anodic and cathodic potentiodynamic polarization and impedance techniques in 3.5% NaCl as corrosive solution. It was found that ZnO nanoparticles improve the barrier and electrochemical anticorrosive properties of poly(o-phenylenediamine).
APA, Harvard, Vancouver, ISO, and other styles
38

Abouzeid, Fatma M. "Study of Steel Electro-dissolution Behavior in Presence of Some Surfactants. Electrochemical Investigation and Surface Active Properties Determination." Revista de Chimie 72, no. 3 (July 29, 2021): 179–97. http://dx.doi.org/10.37358/rc.21.3.8447.

Full text
Abstract:
Steel electro-dissolution performance was investigated in orthophosphoric acid in the presence of N-oleyl 1.3 diaminopropane, Benzalkounuim chloride, Soduim lauryl sulphate and Di-Isononyl phthalate as a surfactant using potentiodynamic polarization measurements. The retardation performance of these surfactants was examined. The surfactant surface active parameters were estimated based on surface tension measurements. The parameters calculated comprise the critical micelle concentration (CMC), maximum surface excess (Гmax), minimum surface area (Amin) and effectiveness (πCMC). The micellization thermodynamic parameters (ΔGmic, ΔSmic) for the estimated surfactants were also computed. Results obtained from surface active properties are comparable with those gained from galvanostatic polarization measurements. Temperature influence on the steel dissolution performance was examined at 25 to 40oC range. Steel kinetic study in orthophosphoric acid- free solution and orthophosphoric acid containing surfactant was also examined. The dissolution kinetic and activated parameters were computed. Results based on microscopy measurement indicate that, addition of new four surfactants, resulting in the solution shows potential, a discrete progress in the metal texture was monitored. Improvement produced in electro-polishing bath by the investigated SAS that owing to the adsorption of such surface active agents on the anode surface.
APA, Harvard, Vancouver, ISO, and other styles
39

MANA, T., A. ATI, B. ZAID, and N. SOUAMI. "MULTICOMPONENT Al-BRONZE COATINGS THERMALLY SPRAYED ONTO TIN BRONZE SUBSTRATE: MICROSTRUCTURAL, MECHANICAL AND CORROSION CHARACTERIZATION IN A 3.5% NaCl SOLUTION." Surface Review and Letters 27, no. 04 (August 9, 2019): 1950140. http://dx.doi.org/10.1142/s0218625x19501403.

Full text
Abstract:
In this work, multicomponent Al-bronze alloys coated Tin-Bronze substrates, fabricated by thermal flame spraying, are characterized by X-ray diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy. Mechanical characterizations are also presented: microhardness measurement and friction coefficient. The electrochemical behavior of tin-bronze samples uncoated and coated with multicomponent Al-Bronze coatings is studied in NaCl 3.5% solutions using potentiodynamic polarization curves and polarization resistance measurements. The microstructure of the coatings has a lamellar morphology. Each lamella is constituted of a mixture of Cu3Al globular micro precipitates ([Formula: see text]-phase) uniformly distributed over the solid solution matrix ([Formula: see text]-Cu). An oxide based on Cu, Al and Fe is also present in very low concentration. [Formula: see text]-phase is unexpected because it is present only above 570∘C in the Cu-Al phase diagram. Compared with the tin-bronze substrate, multicomponent Al-bronze coatings show a friction coefficient three times lower and have a better electrochemical behavior in 3.5% NaCl solution.
APA, Harvard, Vancouver, ISO, and other styles
40

Popoola, Lekan Taofeek, Adeyinka Sikiru Yusuff, Omolayo Michael Ikumapayi, Onyemaechi Melford Chima, Adebayo Tajudeen Ogunyemi, and Babatunde Adegoke Obende. "Electrochemical, Isotherm, and Material Strength Studies of Cucumeropsis mannii Shell Extract on A515 Grade 70 Carbon Steel in NaCl Solution." International Journal of Corrosion 2022 (July 29, 2022): 1–22. http://dx.doi.org/10.1155/2022/3189844.

Full text
Abstract:
In this study, corrosion inhibition efficiency of Cucumeropsis mannii shell extract (CMSE) was tested on A515 Grade 70 carbon steel in 1.0 M NaCl solution. Potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and weight loss (WL) measurements were used to investigate the inhibition efficiency. Scanning electron microscopy, Fourier transform infrared spectroscopy, atomic adsorption spectroscopy, and energy dispersive spectroscopy were used to characterize the carbon steel and extract. PDP and EIS measurements revealed maximum inhibition efficiency of 91.2% and 92.2%, respectively. Tafel plot confirmed inhibitor to be a mixed type. A monolayer adsorption of CMSE molecules occurred spontaneously by physisorption. Polarization resistance increased with increasing inhibitor concentration. WL measurement revealed decrease in corrosion rate with increasing concentration of corrosion inhibitor. Maximum Young modulus and hardness of 202.4 GPa and 112.3 BHN, respectively, were recorded for the carbon steel at a minimum corrosion rate and load. Pitting and uniform corrosion were formed on the carbon steel in the absence of CMSE. CMSE contains –OH, –OCH3, and –C-NH3 as active functional groups. In conclusion, Cucumeropsis mannii shell extract acted excellently as corrosion inhibitor for A515 Grade 70 carbon steel in 1.0 M NaCl.
APA, Harvard, Vancouver, ISO, and other styles
41

Alferi, D., V. Hybášek, P. Novák, and J. Fojt. "Corrosion behaviour of the NiTiX (X = Si, Mg, Al) alloy prepared by self-propagating high-temperature synthesis." Koroze a ochrana materialu 65, no. 2 (September 1, 2021): 57–64. http://dx.doi.org/10.2478/kom-2021-0007.

Full text
Abstract:
Abstract The NiTi alloys are used in the biomaterial field, because of their shape memory, superelasticity, and good corrosion resistance. The influence of alloying elements on the corrosion behaviour of NiTi was studied in this research. Samples were made by the self-propagating high-temperature synthesis method, milled, and then sintered by the spark plasma sintering method. Si, Mg, and Al were used as alloying elements always in 5 wt.%. Studied materials were compared with reference cast NiTi. Polarization resistance was measured after 1 and 12 hours of stabilization in phosphate-buffered saline. It was found out that alloying elements do not have a clear effect on polarization resistance. Si increased Rp and on the other hand, Al decreased it. Measurement of cyclic potentiodynamic polarization in PBS was conducted, too. All studied samples showed signs of localized corrosion. Corrosion was probably initiated in pores, which are presented on the surface due to used manufacturing technology.
APA, Harvard, Vancouver, ISO, and other styles
42

Zhao, Bin, and Li Ke Zou. "Corrosion Inhibition of Chloroacetic-Acid Modified Imidazoline for Q235 Steel in H2SO4 Solution." Advanced Materials Research 710 (June 2013): 41–44. http://dx.doi.org/10.4028/www.scientific.net/amr.710.41.

Full text
Abstract:
A new chloroacetic-acid modified imidazoline (CAMI) was synthesized via the quaternization of imidazoline intermediate, obtained from the amidation and cyclization reactions of benzoic acid and diethylene triamine, with chloroacetic-acid. The performance of the synthesized compound CAMI as corrosion inhibitor for Q235 carbon steel in 5% sulfuric acid solution was investigated by weight loss measurement and potentiodynamic polarization technique. The results show that CAMI possesses strong inhibitive effect on the corrosion of Q235 carbon steel in acid medium and restrains the corrosion without changing the cathodic and anodic corrosion mechanism as a mixed-type inhibitor.
APA, Harvard, Vancouver, ISO, and other styles
43

Gapsari, Femiana, and Andita Ganda. "Psidium guajava Leaves as Corrosion Inhibitor of Al-6061." Materials Science Forum 1045 (September 6, 2021): 231–36. http://dx.doi.org/10.4028/www.scientific.net/msf.1045.231.

Full text
Abstract:
The anti-corrosion characteristic of the extract of Psidiumguajava leaves on aluminum in 3.5 wt% sodium chloride were examined using electrochemical measurement. The thermodynamic factors such as the free energy adsorption, change in enthalpy, and entropy was also analyzed. The adsorption isotherm was detail described to study the adsorption of the inhibitor on the aluminum surface with various concentrations of the inhibitor. The electrochemical measurement was done through the potentiodynamic polarization test. The results show that the inhibitor act as the mixed type inhibitor and its adsorption on the aluminum surface obeys Temkin adsorption isotherm. The study suggests that the use of Psidium guajava leaves extract for the food industrial application is eco-friendly and safe, especially in salt solution medium.
APA, Harvard, Vancouver, ISO, and other styles
44

Loto, Roland Tolulope, and Samuel Keme Ororo. "Electrochemical studies of the synergistic combination effect of thymus mastichina and illicium verum essential oil extracts on the corrosion inhibition of low carbon steel in dilute acid solution." Open Engineering 11, no. 1 (November 19, 2020): 1–13. http://dx.doi.org/10.1515/eng-2021-0001.

Full text
Abstract:
AbstractInhibition effect of the synergistic combination of thymus mastichina and illicium verum oil extracts (TMAV) on the corrosion inhibition of low carbon steel in 0.5 M H2SO4 and HCl solution was studied by weight loss analysis, potentiodynamic polarization, open circuit potential measurement, ATF-FTIR spectroscopy, and optical microscopy and macroscopic characterization. Results from weight loss shows TMAV performed more effectively in H2SO4 solution compared to HCl with optimal inhibition efficiency of 81.24% and 68.33%. Effective inhibition performance was observed at all TMAV concentration in H2SO4 compared to HCl where TMAV performed poorly until 5% concentration. The optimal inhibition performances from potentiodynamic polarization are 80.85% and 70.43%. The corresponding corrosion current density and polarization resistance are 7.16 × 105 A/cm2 and 8.01 × 105 A/cm2, and 331.73 and 284 Ω. TMAV exhibited mixed type inhibition effect in both acid solutions, strongly influencing the anodic-cathodic plot configurations with respect to concentration. Open circuit potential plots without TMAV were significantly electronegative compared to the plots at 1% and 5% TMAV concentration which were relative electropositive due to decreased thermodynamic tendency of the carbon steel to corrode. The corresponding plots at 1% and 5% TMAV concentration from HCl solution were thermodynamically unstable with significant active-passive corrosion behaviour. TMAV inhibited through chemisorption adsorption according to Langmuir and Freudlich adsorption isotherms in H2SO4 solution, and Frumkin and Freundlich adsorption isotherms in HCl solution with correlation coefficient values between 0.7 and 0.9. FTIR spectroscopic analysis exposed the functional groups and atomic bonds responsible for corrosion inhibition.
APA, Harvard, Vancouver, ISO, and other styles
45

Hoshi, Yoshinao, Yusuke Hirayama, Hikari Watanabe, Isao Shitanda, and Masayuki Itagaki. "Communication—In Situ Hydrogen Evolution Detection from Mg Electrode During Anodic Potentiodynamic Polarization Measurement with Gas-Chromatographic Analysis." Journal of The Electrochemical Society 168, no. 3 (March 1, 2021): 031510. http://dx.doi.org/10.1149/1945-7111/abebb0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Idora, M. S. Noor, M. M. Rahman, M. Ismail, and W. B. Wan Nik. "Effect of Zinc Coating Thickness on Corrosion Performance of Mild Steel in Atmospheric and Seawater Environment." Applied Mechanics and Materials 554 (June 2014): 213–17. http://dx.doi.org/10.4028/www.scientific.net/amm.554.213.

Full text
Abstract:
The application of zinc coating as a protective film to the mild steel against corrosion attack in atmospheric and seawater environment was studied. The objective of this study is to evaluate the corrosion performance of mild steel coated by different thickness of zinc under salt spray and also immersion test. The corrosion measurement test was performed by weight loss and potentiodynamic polarization. From the experimental study, it was found that the corrosion rate of mild steel is inversely proportional to the zinc coating thickness. The result also showed that the corrosion rate of mild steel in the salt spray test is higher than the immersion test.
APA, Harvard, Vancouver, ISO, and other styles
47

Kosasang, Onthida, Autsadawooth Kummoo, Ratchapol Konghakot, and Sukangkana Talangkun. "Corrosion Investigation and Microstructure of High Calcium Fly Ash Reinforced Al6061." Key Engineering Materials 824 (October 2019): 260–66. http://dx.doi.org/10.4028/www.scientific.net/kem.824.260.

Full text
Abstract:
In this study, the effect of high Ca fly ash on the corrosion behavior and microstructure of Al6061 alloy matrix composite was investigated. The Al6061 matrix composites containing 5, 7, and 10 wt% of fly ash particles were prepared by the stir casting process. The corrosion behavior was investigated using potentiodynamic polarization measurement using 5 wt% NaCl. The results revealed that the Icorr increased from 2.44 µA/cm2 to 8.60 µA/cm2 as the fly ash concentration increased from 5 wt% to 10 wt%. This increase of Icorr indicates an increase of the corrosion rate. The corrosion mainly occurs at the interface between fly ash particles and Al 6061 matrix.
APA, Harvard, Vancouver, ISO, and other styles
48

KARTHICK, K. A., D. S. BHUVANESHWARI, D. UMAPATHI, and PANDIAN BOTHI RAJA. "BENIGN APPROACH OF CANTHIUM PARVIFLORUM AS A BIOINHIBITOR FOR MILD STEEL CORROSION IN 0.5 M H2SO4 MEDIUM." Surface Review and Letters 27, no. 09 (March 24, 2020): 1950208. http://dx.doi.org/10.1142/s0218625x19502081.

Full text
Abstract:
Canthium parviflorum leaf extract (CPLE) was utilized for corrosion prevention against mild steel (MS) in 0.5[Formula: see text]mol[Formula: see text]L[Formula: see text] H2SO4 test medium. Standard corrosion measurement techniques (gravimetric and electrochemical) were employed for this purpose. Gravimetric tests clearly confirmed that the prepared CPLE efficiently performs as corrosion inhibitor. Potentiodynamic polarization measurements (PPM) and electrochemical impedance spectroscopy (EIS) measurements were performed in order to analyze the charge transfer process of CPLE. Polarization curves indicate that CPLE acts through mixed mode inhibition. Impedance study reveals that the CPLE additives enhances the charge transfer resistance values and conversely decreases values of double layer capacitance. Scanning electron microscopy (SEM), Ultraviolet-Visible (UV-Vis) spectroscopy analysis and Fourier-Transform Infrared spectroscopy (FTIR) were done to confirm the Fe-CPLE complex formation on MS. The effect of temperature reveals that the inhibition efficiency increases with decrease in temperature and increase in concentration of CPLE (maximum of 4[Formula: see text]mg[Formula: see text]L[Formula: see text]). The adsorption of CPLE shows that it obeys Langmuir’s isotherm model with free energy of adsorption, [Formula: see text][Formula: see text]kJ mol[Formula: see text]. A suitable adsorption model is also proposed.
APA, Harvard, Vancouver, ISO, and other styles
49

Hagarová, Mária, Zuzana Fečková, Petra Lacková, and Jana Cervová. "Some Possibilities of Evaluation of Corrosive Resistance of Metal and Non-Metal Coatings." Materials Science Forum 818 (May 2015): 133–36. http://dx.doi.org/10.4028/www.scientific.net/msf.818.133.

Full text
Abstract:
The study investigated the possibilities of determination of corrosion resistance of metal and non-metal (organic) coatings deposited to steel surface in the corrosion environment. To determine the corrosion rate of metal PVD coating based on Ti, we used the method involving measurement of polarization conductivity. Corrosion resistance of galvanic Ni or Ni-Co coatings was determined by measuring free corrosion potential ESCE (against that of saturated calomel electrode SCE), or by means of potentiodynamic polarization relationships according to Tafel. These methods provided the basic corrosion characteristics: corrosion potential Ecorr, instantaneous corrosion rate jcorr and polarization resistance Rp. Corrosion resistance of organic coating Woerodur, which was applied by pressure spray to the substrate pre-treated in various ways, was tested in a salt-fog environment. After the exposure to the respective environment we evaluated the appearance of coating. The aim of the study was to point out to the availability of methods suitable for evaluation of corrosion resistance of coatings, and to the possibilities of their application under real practical conditions.
APA, Harvard, Vancouver, ISO, and other styles
50

Kalia, Vikas, Pradeep Kumar, Suresh Kumar, and Hariom Dahiya. "Corrosion Inhibitive Properties of 5-(4-Aminophenyl)-1,3,4-oxadiazole-2-thiol and 5-(4-Methylphenyl)-1,3,4-oxadiazole-2-thiol on Mild Steel in 1.0 M HCl Solution." Asian Journal of Chemistry 33, no. 12 (2021): 2953–64. http://dx.doi.org/10.14233/ajchem.2021.23394.

Full text
Abstract:
The corrosion inhibition consequence of 5-(4-aminophenyl)-1,3,4-oxadiazole-2-thiol (APOT) and 5-(4-methylphenyl)-1,3,4-oxadiazole-2-thiol (MPOT) were accomplished by employing weight loss measurement, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization measurement and scanning electron microscope (SEM). An impact of immersion time 12.0 h and different temperatures (298, 308 and 318 K) with solution of 1.0 M HCl, which include various concentration of inhibitor at the corrosion of mild steel were designed. Weight loss measurement showed that with enhancing the concentration of these studied inhibitors the percentage inhibition efficiency (IE%) enhances, but corrosion rate (CR) diminishes while reverse condition in case of temperatures change. The electrochemical impedance spectroscopy examine pointed out that the charge transfer resistance (Rct) values enhances and consequently the double layer capacitance (Cdl) values diminishes with rising each inhibitor concentration in 1.0 M HCl and also there is a formation of adsorption coating at the metal surface. Polarization measurement showed that both APOT and MPOT perform as mixed type corrosion inhibitors. Furthermore, the adsorption behaviour on surface of mild steel for each studied inhibitor results the Langmuir adsorption isotherm. Surface conduct of mild steel also designed through the SEM and energy dispersive X-ray (EDX) analysis and concludes that there is evolution of inhibitive film of APOT and MPOT on the surface of mild steel.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography