Journal articles: 'Corrosion Potential Measurement'

1

Krivián, L. "Meaning and measurement of corrosion potential." British Corrosion Journal 26, no. 3 (January 1991): 191–94. http://dx.doi.org/10.1179/000705991798269143.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Marquardt, Helmut. "Corrosion Measurement on Bridge Decks by Potential Mapping." Structural Engineering International 1, no. 3 (August 1991): 49–50. http://dx.doi.org/10.2749/101686691780617535.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Starosta, Robert. "Influence of Seawater Salinity on Corrosion of Austenitic Steel." Journal of KONES 26, no. 3 (September 1, 2019): 219–25. http://dx.doi.org/10.2478/kones-2019-0076.

Full text

Abstract:

Abstract Due to the paramagnetic properties and the ability to passivation, for the production of hulls of some vessels (mainly warships), corrosion-resistant (stainless) steels with austenitic structure are used. This article describes the influence of seawater salinity on selected corrosion properties of high-alloy steel X5CrNi 18-10 (304). The average salinity of the seas is taken as 3.5% content of sodium chloride. Corrosion rate of the tested material was evaluated in an aqueous solution of sodium chloride was evaluated. The NaCl concentration in corrosive solutions was 0.7%, 1.4%, 2.1%, 2.8%, 3.5%, 4.2%. Corrosion tests were performed using the potentiodynamic method. The range of electrochemical potential changes was Ecorr ±150 mV. Corrosion rate was assessed on the basis of corrosion current density measurements. Corrosion potential values against the saturated calomel electrode were also determined. Based on the obtained measurement results and non-parametric significance tests carried out, a significant influence of seawater salinity on the value of corrosion current density and corrosion potential was found. The highest value of corrosion current density (jcorr), and thus the highest corrosion rate, was recorded for 3.5% NaCl solution. In the concentration range from 0.7 to 3.5% NaCl in solution, the corrosion rate of austenitic steel increases. A further increase in salinity of electrolyte results in the inhibition of corrosion rate of steel. There is almost a full negative, linear correlation between the proportion of sodium chloride in the corrosive solution and the value of corrosion potential. Along with the rise in the salinity of seawater, increase the electrochemical activity, and thus the corrosion susceptibility, thus the corrosion susceptibility, of the austenitic steel X5CrNi 18-10 was observed.

APA, Harvard, Vancouver, ISO, and other styles

4

Rashid, Saber, N. Islami, Ahmad Kamal Ariffin, M. Ridha, and Syarizal Fonna. "Assessment of the Elastic Stress of 304 Stainless Steel Using Half-Cell Potential Measurement." Advanced Materials Research 1125 (October 2015): 355–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1125.355.

Full text

Abstract:

The aim of this paper is to investigate the effects of elastic stress for a C-ring specimen with an18.974-mm outer diameter and a 1.244-mm wall thickness. Tests are conducted on Type 304L SS material. Half-cell potential measurement specimens are used as methods of exposure and inspection The C-ring specimen for quantitatively determining the stress corrosion. Applying ASTM G38, which is a standard practice for making and using C-Ring Stress-Corrosion, was performed for elastic stress analysis. The results show that the effects of stress on the polarization curve are due to the magnitude of stress level in the speciﬁc corrosive environment.

APA, Harvard, Vancouver, ISO, and other styles

5

Lee, Sung Yul, Jong Pil Won, Dong Hyun Park, Jae Hyun Jeong, and Kyung Man Moon. "Passing Aged Years to Polarization Characteristics of the Steel Bar Embedded in Mortar Specimen (W/C:0.4)." Advanced Materials Research 821-822 (September 2013): 1227–31. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1227.

Full text

Abstract:

The structures of reinforced concrete has been extensively increased with rapid development of industrial society. Furthermore, these reinforced concretes are often exposed to severely corrosive environments such as sea water, contaminated water, acid rain and seashore etc.. Thus, the corrosion problem of a steel bar embedded in the concrete is very important in terms of the safety and economic points of view. In this study, a multiple mortar test specimen (W/C:0.4) that had six types of cover thickness was prepared and immerged in flowing seawater for five years. And the effects of cover thickness and immersion years on the corrosion properties of the steel bars were investigated using electrochemical methods such as measuring corrosion potential, anodic polarization curve, and impedance. At the beginning of immersion (0 year), corrosion potentials exhibited increasingly nobler value with increasing the cover thickness. However, after being immersed for 5 years, the corrosion potentials conversely shifted in the positive direction with decreasing the cover thickness. As a result, the relationships between corrosion potential and cover thickness were not in good agreement with each other after 5 years. In addition, after 5 years, the thinner cover thickness, the higher value of impedance at 0.01Hz. It is considered that corrosive products deposited on the surface of the steel bar embedded in mortar specimen in the case of thinner cover thickness played the role as a resistance polarization which resulted in decreasing the corrosion current density. Consequently, it seemed to be somewhat problem that evaluation on the corrosion property in reinforced steel would be estimated by only the corrosion potential measurement. Therefore, it is suggested that we should take into account various parameters such as cover thickness, corrosion potential, and immersed years etc. for its accurate assessment. Keywords : Cover thickness, Corrosion potential, Anodic polarization curve, Impedance, Resistance polarization

APA, Harvard, Vancouver, ISO, and other styles

6

Mariani, Simone Umberto, Anna da Forno, and Massimiliano Bestetti. "Corrosion Behaviour of High Pressure Die-Cast and Semi-Solid Cast AZ91, AM60 and AM50 Alloys." Solid State Phenomena 192-193 (October 2012): 231–37. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.231.

Full text

Abstract:

A comparison of corrosion resistance of die-cast and semi-solid cast AZ91, AM60 and AM50 magnesium alloys was performed in different corrosive media by measurement of the open circuit potential, potentiodynamic scans and weight loss tests. Before testing, a heat treatment was carried out onto semi-solid cast alloys. Electrochemical measurements have shown that the semi-solid cast alloys have a different corrosion rate compared to the die-cast ones. The results could be correlated to the different microstructures of the samples produced by the different processes.

APA, Harvard, Vancouver, ISO, and other styles

7

Iwashima, D., K. Ejiri, N. Nagase, M. Hatakeyama, and S. Sunada. "Study Of Rust Preventive Characteristics Of Rust Preventive Oil From Polarization Curve Measurement." Archives of Metallurgy and Materials 60, no. 2 (June 1, 2015): 915–17. http://dx.doi.org/10.1515/amm-2015-0229.

Full text

Abstract:

Abstract Fe-Cu-C sintered steels are widely used as powder materials, because of its small volumetric shrinkage. However, Cu, which acts as cathode enhance formation of rust Fe2O3·xH2O during fabrication. To prevent formation of Fe2O3·xH2O rust preventive oils are widely used. High viscosity of those rust preventive oils decrease workability. While, low viscosity degrade rust preventive performance. Therefore, it is necessary to develop new rust preventive oils with contradictory properties of low viscosity and superior rust prevention. In this study, we developed technique to quantitatively evaluate rust prevention ability by measuring polarization curve through thin corrosive solution on Fe-Cu-C sintered steels coated with rust preventive oils. The electrochemical measurements were carried out in corrosive solution of 0.35 mass % NaCl. Using a double capillary was added dropwise to the specimen. From the experimental, it is possible to evaluate the corrosion rate quantitatively in the surface of specimen, which was coated with rust preventive oil through thin corrosive solution. From the measurement results, Corrosion rate is reduced by coating the rust preventive oil. Especially, corrosion rate of the specimen coated with oil that showed best performance indicated 10000 times better than that of without oil ones. Zn addition negative correlation between corrosion rate and period of potential oscillation.

APA, Harvard, Vancouver, ISO, and other styles

8

Lee, Sung Yul, Jong Pil Won, Dong Hyun Park, Myeong Hoon Lee, and Kyung Man Moon. "The Effect of Cover Thickness to Corrosion Characteristics of Reinforced Steel Bar Emedded in Mortar Specimen (W/C:0.6) Aged 5 Years in Seawater." Advanced Materials Research 785-786 (September 2013): 1176–80. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.1176.

Full text

Abstract:

Reinforced concrete structures have been increasingly widely used through numerous industrial fields. These structures are often exposed to severely corrosive environments such as sea water, contaminated water, acid rain, and the seashore. Thus, corrosion problems of the steel bars embedded in concrete are very important from a safety and economic point of view. In this study, the effects of cover thickness on the corrosion properties of reinforced steel bar embedded in mortar specimen (W/C:0.6) were investigated using electrochemical methods such as corrosion potentials, polarization curves, cyclic voltammograms, galvanostat and potentiostat. Corrosion potentials shifted to the noble direction, and the value of AC impedance also exhibited a higher value with increasing cover thickness, furthermore, polarization resistance also increased with increasing cover thickness. This is probably that the thinner cover thickness, seawater solution is easy to arrive at embedded steel compared to other thicker cover thickness, so, its steel bar may be easily corroded due to chloride ion, which is resulted in shifting corrosion potential to negative direction, decreasing polarization resistance. Consequently, it is considered that the relation between corrosion resistance of reinforced steel and cover thickness is nearly matched with each other. However, its corrosion resistance estimated by measurement of corrosion potential was not well in agreement with value obtained by polarization curves.

APA, Harvard, Vancouver, ISO, and other styles

9

Ihsan, Muhammad, Syarizal Fonna, N. Islami, Faizar ., and A. K. Ariffin. "Simulation of corrosion field measurement on reinforced concrete using BEM." Journal of Mechanical Engineering and Sciences 15, no. 2 (June 10, 2021): 8072–81. http://dx.doi.org/10.15282/jmes.15.2.2021.11.0636.

Full text

Abstract:

Reinforced concrete (RC) corrosion is a leading of structural deterioration and premature degradation for the infrasturctures, with significant affected for safety, durability and reability. Therefore, early assessment of RC corrosion is important to prevent deterioration of the structure. The objective of this paper is to apply Boundary Element Method (BEM) for improving reinforced concrete (RC) corrosion assessment using field measurement data. In this study, the potential on whole domain of concrete structures was modeled by Laplace equation. The Laplace equation was solved by BEM, hence the potential on the concrete structure can be determined. The field data were measured by using half-cell potential technique and collected from an existing house in Aceh region that struck by the 2004 Sumatra tsunami. The simulation results show the use of BEM can improve the RC corrosion assessment. According to ASTM C876, the distribution of potential values on the concrete surface above the corroded area were in range -200 mV to -350 mV that indicated active corrosion was occurred. It can be inferred, the method can improve the field measurement data since it has capability to predict the corrosion profiles of reinforcing steel in more precise.

APA, Harvard, Vancouver, ISO, and other styles

10

Bosch, R. W., and W. F. Bogaerts. "Instantaneous Corrosion Rate Measurement with Small-Amplitude Potential Intermodulation Techniques." CORROSION 52, no. 3 (March 1996): 204–12. http://dx.doi.org/10.5006/1.3292115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Nagrabia, Agnieszka, Maciej Sowa, Wojciech Simka, and Artur Maciej. "Galvanic Formation of Zn-Ni/Zn-Co Type Multilayer Alloy Coatings on Steel Substrate." Solid State Phenomena 227 (January 2015): 147–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.147.

Full text

Abstract:

Zn-Ni and Zn-Co monolayer and Zn-Ni/Zn-Co multilayer (from 2 to 128 layers) alloy coatings were formed on steel substrate by electrodeposition from acidic Zn-Ni bath and neutral Zn-Co bath. Samples were tested in salt chamber for corrosion resistance in neutral salt spray. Open circuit potential measurement and gravimetric study of corrosion were carried for samples immersed in the 5% NaCl solution.It was found that coatings of Zn-Ni surface layer occurred higher corrosion resistance then the coatings of Zn-Co surface layer. Sixteen-layer coating with Zn-Ni surface layer proved to be most effective in protecting the steel substrate. Zn-Ni monolayer showed the lowest corrosion potential, which affects the corrosion properties. Sample weight changes during exposure to a corrosive environment are related to digestion of the coating and the formation of corrosion products.

APA, Harvard, Vancouver, ISO, and other styles

12

Ramón, Jose Enrique, Isabel Martínez, José Manuel Gandía-Romero, and Juan Soto. "An Embedded-Sensor Approach for Concrete Resistivity Measurement in On-Site Corrosion Monitoring: Cell Constants Determination." Sensors 21, no. 7 (April 2, 2021): 2481. http://dx.doi.org/10.3390/s21072481.

Full text

Abstract:

The concrete electrical resistivity is a prominent parameter in structural health monitoring, since, along with corrosion potential, it provides relevant qualitative diagnosis of the reinforcement corrosion. This study proposes a simple expression to reliable determine resistivity from the concrete electrical resistance (RE) provided by the corrosion sensor of the Integrated Network of Sensors for Smart Corrosion Monitoring (INESSCOM) we have developed. The novelty here is that distinct from common resistivity sensors, the cell constants obtained by the proposed expression are intended to be valid for any sensor implementation scenario. This was ensured by studying most significant geometrical features of the sensor in a wide set of calibration solutions. This embedded-sensor approach is intended to be applicable for RE measurements obtained both using potential step voltammetry (PSV, used in the INESSCOM sensor for corrosion rate measurement) and alternating current methods. In this regard, we present a simple protocol to reliably determine RE, and therefore resistivity, from PSV measurements. It consists in adding a very short potentiostatic pulse to the original technique. In this way, we are able to easy monitor resistivity along with corrosion rate through a single sensor, an advantage which is not usual in structural health monitoring.

APA, Harvard, Vancouver, ISO, and other styles

13

Mackenzie, C., C. Rowley-Williams, M. Achour, D. Blumer, M. Joosten, and M. Rowe. "Potential for Measurement of Corrosion-Inhibitor-Micelle Presence as an Indicator of Optimum Dose." SPE Journal 17, no. 02 (January 24, 2012): 393–401. http://dx.doi.org/10.2118/130285-pa.

Full text

Abstract:

Summary This paper discusses the principle and proof of concept of a novel corrosion-management tool based on maintaining optimum corrosion-inhibitor dose in an inhibited environment. Film-forming corrosion inhibitors typically contain active ionic surfactant molecules, which adsorb on surfaces and form a protective barrier against corrosion. Upon saturation of surfaces by the inhibitor, the molecules are found in the aqueous phase as micelles or in the oil phase as reverse micelles. The proposed technique is based on the hypothesis that the presence of these micelles in the water phase could be used to indicate the total surface coverage and, therefore, the optimum dose. The technique has been applied in the laboratory simulating an actual inhibited multiphase production system. Fluorescent markers, which are extremely sensitive to micelle presence, have been developed and used during the laboratory testing. Results were compared with those from standard laboratory techniques, including interfacial tension (IFT) and particle-size analyses (diffraction), in order to determine the efficacy for micelle detection. Corrosion bubble tests were also used to determine any link to inhibitor efficiency. IFT results showed complex events occurring with increasing inhibitor concentration. The IFT vs. inhibitor concentration curve was nonclassical, probably because of the multicomponent nature of inhibitor formulations, but suggested micelle formation at approximately 150 ppm. Fluorescence analysis suggested that micelles formed starting at a 150-ppm dose. Particle-size analysis was consistent with micelle presence beyond this concentration. Separate experiments comparing fluorescence with corrosion rates demonstrated an apparent nonlinear variance with inhibitor concentration, supporting the hypothesis. The analytical comparisons supported the underlying principles of this micelle-detection technology. Development of a portable device is under way and will provide an important new tool for proactive corrosion management in the oil field as well as a useful laboratory qualification method.

APA, Harvard, Vancouver, ISO, and other styles

14

Ueyama, Yutaka, Kenji Hisamune, Takeshi Terakado, Hidehiro Tobita, Katsuhiko Kato, and Hideyuki Sekiguchi. "ICONE19-43221 Planning of Environmental Mitigation for Stress Corrosion Cracking of BWR Core Internals by Means of Noble Metal Chemical Addition and of Electrochemical Corrosion Potential Measurement." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1943. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1943_89.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Asmara, Y. P., J. P. Siregar, C. Tezara, Wan Nurlisa, and J. Jamiluddin. "Long Term Corrosion Experiment of Steel Rebar in Fly Ash-Based Geopolymer Concrete in NaCl Solution." International Journal of Corrosion 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/3853045.

Full text

Abstract:

This research focuses on an experimental investigation to identify the effects of fly ash on the electrochemical process of concrete during the curing time. A rebar was analysed using potentiostat to measure the rest potential, polarization diagram, and corrosion rate. Water-to-cement ratio and amount of fly ash were varied. After being cured for 24 hours at a temperature of 65°C, the samples were immersed in 3.5% of NaCl solution for 365 days for electrochemical measurement. Measurements of the half-cell potential and corrosion current density indicated that the fly ash has significant effects on corrosion behaviour of concrete. Although fly ash tends to create passivity on anodic current, it increases corrosion rate. The corrosion potential of this concrete mixture decreases compared to concrete without fly ash. From the result, it can be summarized that concrete mixture with 70% of OPC (Ordinary Portland Cement) and 30% fly ash has shown the best corrosion resistance.

APA, Harvard, Vancouver, ISO, and other styles

16

Saraswathy, Velu, Han-Seung Lee, Subbiah Karthick, and Seung-Jun Kwon. "Stress Corrosion Behavior of Ungrouted Pretensioned Concrete Beams." Advances in Materials Science and Engineering 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/8585162.

Full text

Abstract:

Prestressed concrete beams of size 150 × 150 × 1000 mm were designed, and two bonded cold-drawn 7 mm steel wires were stressed at 70% UTS under service conditions before concreting. The beams were cast with M40 grade concrete mix with various percentages of chlorides ranging from 0, 1, 2, and 3% by weight of cement and cured for 28 days. After 28 days, the stretching forces were released, the prestressing steel wire was allowed to regain its original length, the tensile stresses were transformed into a compressive stress in the concrete, and the stress corrosion behavior was assessed. Stress corrosion cracking (SCC) is due to the simultaneous action of stress, corrosive media, and material properties. The stress corrosion behavior of ungrouted pretensioned steel was assessed by using various electrochemical techniques such as electrochemical noise, open-circuit potential measurement, AC impedance, and potentiodynamic polarization measurements. The same experiments were conducted for rebars embedded in the concrete beam with various percentages of chlorides ranging from 0, 1, 2, and 3% by weight of chloride. After 30 days of exposure, the beams were tested for their flexural strength measurements to find out the load-bearing capacity.

APA, Harvard, Vancouver, ISO, and other styles

17

Arioka, Shinpei, Makoto Matsuoka, Takashi Yamamoto, Kazuo Komori, and Hiroyuki Inoue. "The Condition Monitoring of a Chemical Plant with the On-line Measurement of Corrosion Potential Variation and Corrosion Potential Noise." Zairyo-to-Kankyo 63, no. 12 (2014): 600–608. http://dx.doi.org/10.3323/jcorr.63.600.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Hirohata, Youhei, Kazuhiko Noda, Hideki Katayama, and Hiroyuki Masuda. "Evaluation of Atmospheric Corrosion on Metal by Surface Potential Distribution Measurement." Journal of the Japan Institute of Metals 75, no. 5 (2011): 310–14. http://dx.doi.org/10.2320/jinstmet.75.310.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Koyama, Rie, Tetsuji Yajima, Taketo Uomoto, and Tomio Hoshino. "Prediction of Steel Corrosion Portion and Area by Natural Potential Measurement." Doboku Gakkai Ronbunshu, no. 550 (1996): 13–22. http://dx.doi.org/10.2208/jscej.1996.550_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Honda, Kazuhiko, Akira Usami, and Hiromasa Nomura. "Potential Distribution Measurement of Under-film Corrosion by Scanning Kelvin Probe." Zairyo-to-Kankyo 47, no. 6 (1998): 403–5. http://dx.doi.org/10.3323/jcorr1991.47.403.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Leelalerkiet, Veerachai, Je-Woon Kyung, Masayasu Ohtsu, and Masaru Yokota. "Analysis of half-cell potential measurement for corrosion of reinforced concrete." Construction and Building Materials 18, no. 3 (April 2004): 155–62. http://dx.doi.org/10.1016/j.conbuildmat.2003.10.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Maltman, B. H., and M. J. Robinson. "Ion exchange resin fibres for potential measurement in crevice corrosion studies." Corrosion Science 27, no. 8 (January 1987): 879–83. http://dx.doi.org/10.1016/0010-938x(87)90045-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Bösing, Ingmar, Jorg Thöming, and Michael Baune. "Electrolyte Composition for Distinguishing Corrosion Mechanisms in Steel Alloy Screening." International Journal of Corrosion 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/9425864.

Full text

Abstract:

The formation and breakdown of passive layers due to pitting corrosion are a major cause of failure of metal structures. The investigation of passivation and pitting corrosion requires two different electrochemical measurements and is therefore a time consuming process. To reduce time in material characterization and to study the interactions of both mechanisms, here, a combined experiment addressing both phenomena is introduced. In the presented electrolyte the different corrosion mechanisms are distinguished and investigated by cyclic voltammograms and polarization scans. The measurements show a passive area, metastable pit growth, and pitting corrosion as well as repassivation. The pitting corrosion is separated from additional dissolution processes and the standard deviation of the corrosion potential is smaller than in other electrolytes. Both passivation and pitting corrosion can be observed in one measurement without additional corrosion attacks. The deviation between different measurements of the same steel is small; this is helpful for the screening of similar materials.

APA, Harvard, Vancouver, ISO, and other styles

24

Asaduzzaman, M. D., Chand Mohammad, and Islam Mayeedul. "Effects of concentration of sodium chloride solution on the pitting corrosion behavior of AISI 304L austenitic stainless steel." Chemical Industry and Chemical Engineering Quarterly 17, no. 4 (2011): 477–83. http://dx.doi.org/10.2298/ciceq110406032a.

Full text

Abstract:

The pitting corrosion behavior of the austenitic stainless steel in aqueous chloride solution was investigated using electrochemical technique. Corrosion potential (Ecorr) measurement, potentiodynamic experiments, potential-hold experiments in the passive range, and microscopic examination were used for the evaluation of corrosion characteristics. The experimental parameters were chloride ion concentration, immersion time and anodic-hold potential. Ecorr measurements along with microscopic examinations suggest that in or above 3.5 % NaCl at pH 2 pitting took place on the surface in absence of applied potential after 6 hour immersion. The potentiodynamic experiment reveals that Ecorr and pitting potential (Epit) decreased and current density in the passive region increased with the increase of chloride ion concentrations. A linear relationship between Epit and chloride ion concentrations was found in this investigation. The analysis of the results suggests that six chloride ions are involved for the dissolution of iron ion in the pitting corrosion process of austenitic stainless steel.

APA, Harvard, Vancouver, ISO, and other styles

25

Cui, Zheng Hua, De Jian Shen, Cong Bin Huang, and Ming Li. "Experimental Study on Relationship between Half-Cell Potentials and Load Carrying Capacity of Corroded Reinforced Concrete Shear Walls." Applied Mechanics and Materials 351-352 (August 2013): 927–32. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.927.

Full text

Abstract:

This paper addresses the results of an experimental study on relationship between half-cell potentials and load carrying capacity of corroded concrete RC shear walls. There are four specimens in the test with the corrosion rate of 0%, 3%, 9% and 15%, respectively. Before and after the accelerate corrosion test, half-cell potential measurement was used to attain half-cell potentials. The horizontal load carrying capacity was attained under cyclic loading. Results show that load carrying capacity of corrosion damaged walls decrease with the increase of corrosion rate, as well as half-cell potentials. The relationship among corrosion rate, half-cell potentials and load carrying capacity is presented.

APA, Harvard, Vancouver, ISO, and other styles

26

Genoni, Carmine, Anna da Forno, and Massimiliano Bestetti. "Comparison of Corrosion Resistance of High Pressure Die-Cast and Semi-Solid Cast AZ91, AM60, Alloys and Respective Anodic Oxides." Materials Science Forum 765 (July 2013): 618–22. http://dx.doi.org/10.4028/www.scientific.net/msf.765.618.

Full text

Abstract:

A comparison of corrosion resistance of die-cast and semi-solid cast AZ91and AM60 magnesium alloys was performed in corrosive medium by measurement of the open circuit potential and potentiodynamic scans. Before testing, a heat treatment was carried out on the semi-solid cast alloys. Moreover, electrochemical measurements were performed on the four different substrates anodized in the micro-arc regime in an environment friendly alkaline aqueous solution. The results could be correlated to the different microstructures of the samples produced by the different processes and to the different compactness/porosity of the oxides.

APA, Harvard, Vancouver, ISO, and other styles

27

Jeong, Jin A. "Experimental Study of Corrosion Sensors for the Design Technology of Bridge Longevity." Applied Mechanics and Materials 597 (July 2014): 421–24. http://dx.doi.org/10.4028/www.scientific.net/amm.597.421.

Full text

Abstract:

Corrosion of steel reinforcement is a major factor in the deterioration of harbor and bridge structure. Steel corrosion in concrete must be checked for investigating the condition of a reinforced concrete structure. The several way how to measuring corrosion condition of reinforced concrete, but the corrosion potential measurement is a very simple, rapid, cost-effective and non-destructive technique to evaluate the severity of corrosion in reinforced concrete structure. However some particular situations may not relate to the reinforcement corrosion probability and a simple comparison of the corrosion potential data with the ASTM Standard on steel reinforcement corrosion probability could prove meaningless because of environment factors as oxygen concentration, chloride content, the concrete resistance. Therefore this paper proposed compact designed corrosion sensors to monitor several corrosion factors, and the electrochemical measurement and evaluation have been carried out to investigate rebar corrosion, and a reasonable prediction of corrosion has been obtained in terms of nondestructive electrochemical point of view.

APA, Harvard, Vancouver, ISO, and other styles

28

Raczkiewicz, Wioletta, and Artur Wójcicki. "Temperature Impact on the Assessment of Reinforcement Corrosion Risk in Concrete by Galvanostatic Pulse Method." Applied Sciences 10, no. 3 (February 6, 2020): 1089. http://dx.doi.org/10.3390/app10031089.

Full text

Abstract:

The electrochemical galvanostatic pulse method (GPM) is used for the evaluation of the degree of corrosion risk of reinforcement in concrete. This non-destructive method enables determining the corrosion promoting conditions through the measurements of reinforcement stationary potential and concrete cover resistivity, and determining the probability of reinforcement corrosion in the tested areas. This method also allows for the estimation of the reinforcement corrosion activity and the prediction of the development of the corrosion process on the basis of corrosion current density measurements. The ambient temperature (and the temperature of the examined element) can significantly affect the values of the measured parameters due to electrochemical character of the processes as well as specific measurement technique. Differences in the obtained results can lead to a wrong interpretation of reinforcement corrosion risk degree in concrete. The article attempts to assess the effect of temperature on the measured parameters while using the galvanostatic pulse method. The GP-5000 GalvaPulseTM set was used. The results of this study confirmed the impact of temperature changes on the values of three measured parameters (reinforcement stationary potential, concrete cover resistivity, and corrosion current density) and contributed to catching the trend of these changes.

APA, Harvard, Vancouver, ISO, and other styles

29

Plotnikova, M. D., A. B. Shein, M. G. Shcherban`, and A. D. Solovyev. "The study of thiadiazole derivatives as potential corrosion inhibitors of low-carbon steel in hydrochloric acid." Bulletin of the Karaganda University. "Chemistry" series 103, no. 3 (September 30, 2021): 93–102. http://dx.doi.org/10.31489/2021ch3/93-102.

Full text

Abstract:

The inhibition effect of series of thiadiazole derivatives against the corrosion of mild steel in 15 % HCl was studied by weight-loss method and electrochemical measurements. The experiments were performed on steel St3 at 293 K, the exposure time of the samples in solution for weight-loss measurements was 24 h. Potentiodynamic polarization curves were obtained in a typical three electrode cell with the help of electrochemical measuring complex SOLARTRON 1280 C. A scan rate was 1 mV⋅s-1 and a measurement point was taken every 0.2 s. 2-aminothiazole, 5-amino-1,3,4-thiadiazole-2-thiol, 2-amino-1,3,4-thiadiazole, 2-amino-5-(furan-2-yl)- 1,3,4-thiadiazole, 1,3,4-thiadiazole-2-ylamide of acetic acid were studied as potential inhibitors. The maximal inhibition efficiency was obtained at concentration 0.10-0.20 g⋅L−1. The best result was demonstrated by 5-amino-1,3,4-thiadiazole-2-thiol (inhibition effect was more than 90 %). The minimal inhibition effect had 1,3,4-thiadiazole-2-ylamide acetic acid. The corrosion inhibition effect calculated from data of the corrosion current density and from the weight-loss measurements were in sufficiently good agreement. The effective activation energy of the corrosion of St3 increased significantly due the presence of the inhibitors (from 3.3 to 94.8 kJ⋅mol-1). The results point to promising of investigating of series of thiadiazole derivatives and inhibitory compositions based on thiadiazole as potential acid corrosion inhibitors.

APA, Harvard, Vancouver, ISO, and other styles

30

Woo, Byeong Hun, In Kyu Jeon, Seong Soo Kim, Jeong Bae Lee, and Jae-Suk Ryou. "An Experimental and Statistical Study on Rebar Corrosion Considering the Temperature Effect Using Gaussian Process Regression." Applied Sciences 10, no. 17 (August 27, 2020): 5937. http://dx.doi.org/10.3390/app10175937.

Full text

Abstract:

Temperature is an important factor that affects corrosion potential in rebars. The temperature effect must be removed from the corrosion potential for precise measurement of corrosion rates. To separate the temperature effect from the corrosion potential, in this study rebar specimens were not embedded in concrete but, instead, were placed in an uncontrolled air environment. Gaussian process regression (GPR) was applied to the temperature and the non-corrosion potential data in order to remove the temperature effect from the corrosion potential. The results indicated that the corrosion potential was affected by the temperature. Furthermore, the GPR models of all the experimental cases showed high coefficients of determination (R2 > 0.90) and low root mean square errors (RMSE < 0.08), meaning that these models had high reliability. The fitted GPR models were used to successfully remove the temperature effect from the corrosion potential. This demonstrates that the GPR method can be appropriately used to assess the temperature effect on rebar corrosion.

APA, Harvard, Vancouver, ISO, and other styles

31

SHUAIB-BABATA, YUSUF LANRE, KOBE HASSAN IBRAHIM, OWOLABI IBRAHIM AMBALI, ABOLORE RAHEEM YAHYA, SULEIMAN KABIRU AJAO, ISHAQ NA'ALLAH AREMU, and ABIBAT ATINUKE PELUMI. "Inhibitive Potential of Prosopis Africana on Corrosion of Low Carbon Steel in 1M Hydrochloric Acid Medium." International Journal of Engineering Materials and Manufacture 4, no. 2 (June 15, 2019): 66–76. http://dx.doi.org/10.26776/ijemm.04.02.2019.04.

Full text

Abstract:

Recently, there is quest for the use of inexpensive, non-toxic, non-biodegradable, readily available and environmentally acceptable corrosion inhibitor. Studies have shown that these properties could be achieved through the use of plants as inhibitor. Inhibiting effect of Prosopis Africana (Iron Tree) seed extracts were assessed on a sample of low carbon steel in 1M HCl with varying proportion of the seed extract using gravimetric, Tafel polarization and gasometrical measurement techniques. The results show that weight loss/corrosion rate decreases with increase in the extracts’ concentrations. Good inhibiting efficiency of Prosopis Africana extracts with optimum inhibiting efficiency of 97.7% at 1.0 g/l after 120 hours exposure in gravimetric measurement was attained. TAFEL polarization results revealed that the Prosopis Africana extract shows that the corrosion current density decreases with the increase in the concentration of the extract. The extract is found suitable as green inhibitor for corrosion of low carbon steel in the studied medium.

APA, Harvard, Vancouver, ISO, and other styles

32

Jones, S., K. Coley, and J. Kish. "Prediction and Measurement of Corrosion Rates of Stainless Steel in Concentrated Sulfuric Acid." Corrosion 69, no. 6 (January 3, 2013): 543–50. http://dx.doi.org/10.5006/0709.

Full text

Abstract:

When exposed to concentrated sulfuric acid, stainless steel exhibits unique electrochemical behavior. This behavior can be observed as an oscillation in open-circuit potential between the active and passive states. The transient nature of the corrosion behavior under these conditions results in a distinct challenge for measuring and predicting corrosion rates. Using a series of commercial alloys with various nickel contents, this paper outlines the utilization of electrochemical experimentation to refine the prediction of corrosion rates. The paper also discusses some of the difficulties associated with many traditional electrochemical techniques such as potentiodynamic scans when used for characterizing systems that undergo oscillations in open-circuit potential.

APA, Harvard, Vancouver, ISO, and other styles

33

Gupta, Dipak Kumar, Laxmi Awasthi, Anju Kumari Das, Brahamdeo Yadav, Anita Ghimire, and Amar Prasad Yadav. "Corrosion Inhibition Effect of Acidic Extract of Bark of Eucalyptus Globulus on Mild Steel." Tribhuvan University Journal 35, no. 1 (June 30, 2020): 1–10. http://dx.doi.org/10.3126/tuj.v35i1.35828.

Full text

Abstract:

The corrosion inhibition properties of the acidic extract of Eucalyptus globulus (EG) was investigated for mild steel (MS) using the weight loss method and open circuit potential (OCP) measurement. Corrosion inhibition of MS in 0.1M HCl was studied in the absence and presence of various concentrations of the acidic extract of EG barks. The results showed an increase in corrosion inhibition with increasing concentration of the extract. The inhibition efficiency of 100% EG extract was approximately 98.0% after 24 hours immersion in the acidic solution. FTIR spectrum showed the presence of compounds containing oxygen and nitrogen functional groups responsible for forming barrier layers onto MS surface. Open circuit potential (OCP) measurements showed that the EG extract acts as a mixed type inhibitor.

APA, Harvard, Vancouver, ISO, and other styles

34

Shit, Gopinath, and S. Ningshen. "The corrosion behavior of compositional modified AISI type 304L stainless steel for nitric acid application." Anti-Corrosion Methods and Materials 66, no. 2 (February 21, 2019): 149–58. http://dx.doi.org/10.1108/acmm-02-2018-1906.

Full text

Abstract:

Purpose High corrosion resistance in different concentrations of nitric acid is essential for structural steels to be used for the aqueous reprocessing of spent nuclear fuels with high plutonium content. Design/methodology/approach In the present study, the corrosion resistance of type 304L stainless steel (SS) with modified composition was evaluated in different concentrations of nitric acid using surface analytical techniques, weight loss method and electrochemical measurements. Findings Weight loss measurement in boiling 65 per cent nitric acid showed a low corrosion rate value of about 0.2 mm/y (8 mpy) after 240 h exposure. Electrochemical measurements revealed the shift in open circuit potentials as well as corrosion potential toward more noble direction, and the results of electrochemical impedance spectroscopy studies indicated the reduction in the thickness and stability of the passive film with increasing concentration from 6 to 11.5 M nitric acid. Research limitations/implications The low corrosion rate observed for this steel is attributed to the higher content of Cr (19 per cent), Ni (10 per cent) and Si (0.3 per cent) and controlled minor alloying elements (S, P, B, C, etc.) in the alloy that contributed to improving the transpassive corrosion resistance and minimizing the intergranular corrosion attack. The X-ray photoelectron spectroscopic analysis revealed the composition of the passive films to be mainly of iron and chromium oxides. Practical implications Materials with lower corrosion rates are desirable for applications in nitric acid. Social implications The used of nitric acid creates a severe corrosive environment in chemical or aqueous nuclear reprocessing plants, and hence with a modified composition of type 304L SS resulting in minimizing failure of components are desirable for reducing cost and maintenance. Originality/value The present paper is an original work carried out by the authors on the corrosion resistance behaviors of composition modified AISI type 304L SS for nitric acid application. The effects of different nitric acid concentrations were compared to provide understanding on in applicability in boiling and high nitric acid concentrations.

APA, Harvard, Vancouver, ISO, and other styles

35

Yodsudjai, Wanchai, and Thanawit Pattarakittam. "Factors influencing half-cell potential measurement and its relationship with corrosion level." Measurement 104 (July 2017): 159–68. http://dx.doi.org/10.1016/j.measurement.2017.03.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Nagano, Hiroo. "Importance of Electrochemical Potential Measurement in Developing Corrosion Resistant Metals and Alloys." Zairyo-to-Kankyo 50, no. 2 (2001): 40–44. http://dx.doi.org/10.3323/jcorr1991.50.40.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Kyung, Je-Woon, Sung-Ho Tae, Han-Seung Lee, Yalcin Alver, and Jo-Hyeong Yoo. "IBEM analyses on half-cell potential measurement for NDE of rebar corrosion." Computers and Concrete 4, no. 4 (August 25, 2007): 285–98. http://dx.doi.org/10.12989/cac.2007.4.4.285.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Hagarová, Mária, Dagmar Jakubéczyová, Gabriela Baranová, and Rastislav Šimko. "Determination of Bimetallic Corrosion Risk Using an Electrochemical Method." Materials Science Forum 960 (June 2019): 62–69. http://dx.doi.org/10.4028/www.scientific.net/msf.960.62.

Full text

Abstract:

The purpose of this study was to investigate (simulation of environment for salt treatment of roads in winter and the simulation of the environment of condensed exhaust gas) the galvanic corrosion phenomena which can exist in the construction coupling of cars. The electrochemical behaviour of the hot dip galvanized steel and aluminium alloy, stainless steel and aluminium alloy and stainless steel and silumin which were investigated by electrochemical methods in 3 % NaCl solution and in SEG solution. The open corrosion potential measurement was used to obtain the values of the potential for each couple. The measurement showed a greater bimetallic risk for hot dip galvanized steel with aluminium alloy, where there was ΔESCE > 500 mV and this couple is not suitable either for use in aggressive environment. Calculation of the rate of corrosion attack results from the determination of corrosion currents as measured by Taffel and Evans. The extent of corrosion damage was analysed by means of a light microscope. Keywords: bimetallic; aluminium alloy; stainless steel; silumin; exhaust gas; corrosion potential; electrochemical method;

APA, Harvard, Vancouver, ISO, and other styles

39

Allahkaram, Saeed Reza, and Namdar Mohammadi. "Corrosion behavior of two candidate PEMFC’s bipolar plate materials." Anti-Corrosion Methods and Materials 64, no. 3 (May 2, 2017): 293–98. http://dx.doi.org/10.1108/acmm-05-2015-1540.

Full text

Abstract:

Purpose This paper aims to evaluate corrosion behavior of bare and PbO2-coated stainless steel 316L, as prospective candidates for bipolar plates, in simulated proton exchange membrane fuel cell’s (PEMFC’s) environment under operating potentials. Design/methodology/approach A set of potentiodynamic, as well as potentiostatic, electrochemical experiments was carried out under both anodic and cathodic potentials. Gathered data were analyzed via fast Fourier transform algorithm for further investigation. X-ray diffraction analysis was also used for determining coating characteristics upon completion of electrochemical experiments. Findings Results revealed that bare SS316L is a better candidate for bipolar plate material under anodic potential, as it is cathodically protected. However, PbO2-coated SS316L is favorable under cathodic potential, as bare specimen will suffer localized corrosion in the form of pitting. Research limitations/implications It would be of interest if all the experiments are carried out in a PEMFC stack. Practical implications This research strives to promote the use of electrochemical noise measurement for practical corrosion monitoring of coated bipolar plates in fuel cells. Social implications Improving the corrosion resistance of bipolar plates will expedite commercialization of PEMFCs, which in turn will translate into a substantial reduction in carbon footprint. Originality/value This research strives to promote the use of electrochemical noise measurement for practical corrosion monitoring of coated bipolar plates in fuel cells.

APA, Harvard, Vancouver, ISO, and other styles

40

Schneck, Ulrich. "Instant performance verification after electrochemical chloride extraction by enhanced corrosion testing." MATEC Web of Conferences 289 (2019): 03009. http://dx.doi.org/10.1051/matecconf/201928903009.

Full text

Abstract:

Electrochemical chloride extraction (ECE) is meant to re-establish the corrosion protection of concrete for the embedded reinforcement by removing chloride non-destructively and by enhancing the alkalinity of the rebar surrounding concrete. Both effects depend on various parameters, such as concrete cover, rebar spacing, chloride profile (especially if chloride ingress is deeper than the outside rebar layer) and concrete permeability. Often these parameters require long or multi-stage treatments, which basically can achieve any desired target level of chloride profile and impressed charge, but become a costly solution after a while. The acceptance criteria mentioned in CEN TS 14038-2 clause 8.6 refer to the achieved chloride content and to the amount of impressed charge, which are the conventional, easy measurable, but not direct parameters for evaluating the corrosion activity. A third parameter – the re-measurement of potentials for assessing (intended) low potential gradients and more positive average potentials – requires some weeks to months of depolarization and evaporation of water, before such a measurement can be applied successfully. A promising approach for an instant performance testing after an ECE treatment has been made on several occasions with follow-up measurements of electrolyte resistance, polarization resistance and corrosion current. Convincing changes towards significantly lower corrosion activity could be obtained (and compared to known classified values) – regardless of sometimes high residual chloride and very wet concrete. These data could be verified when re-assessed after some weeks, so enhanced corrosion measurements seem to be a useful tool for either establishing that the designed treatment time has been sufficient or to check on possible earlier termination of the treatment during a running ECE.

APA, Harvard, Vancouver, ISO, and other styles

41

Thapa, Bishal, Dipak Kumar Gupta, and Amar Prasad Yadav. "Corrosion Inhibition of Bark Extract of Euphorbia royleana on Mild Steel in 1M HCl." Journal of Nepal Chemical Society 40 (December 31, 2019): 25–29. http://dx.doi.org/10.3126/jncs.v40i0.27274.

Full text

Abstract:

The bark extract of Euphorbia royleana as a green corrosion inhibitor was studied in 1M HCl using weight-loss method and potential measurement. The results show that the bark extract of Euphorbia royleana is an effective anti-corrosion inhibitor of mild steel in acidic media. The corrosion rate decreases with the time of immersion. Weight loss experiment shows that the loss in weight decreases with the time of immersion and inhibition efficiency increases with the concentration of extract. It was observed that maximum inhibition efficiency is 99.60% in 100% concentration of extract. Potential measurement study shows that bark extracts act as a mixed type of inhibitor i.e. inhibits both anodically as well as cathodically.

APA, Harvard, Vancouver, ISO, and other styles

42

Szabó, S., and I. Bakos. "Reference Electrodes in Metal Corrosion." International Journal of Corrosion 2010 (2010): 1–20. http://dx.doi.org/10.1155/2010/756950.

Full text

Abstract:

With especial regard to hydrogen electrode, the theoretical fundamentals of electrode potential, the most important reference electrodes and the electrode potential measurement have been discussed. In the case of the hydrogen electrode, it have been emphasised that there is no equilibrium between the hydrogen molecule (H2) and the hydrogen (H+), hydronium (H3O+) ion in the absence of a suitable catalyst. Taking into account the practical aspects as well, the theorectical basis of working of hydrogen, copper-copper sulphate, mercury-mercurous halide, silver-silver halide, metal-metal oxide, metal-metal sulphate and “Thalamid” electrodes, has been discussed.

APA, Harvard, Vancouver, ISO, and other styles

43

Di Francia, Elisabetta, Sabrina Grassini, Giovanni Ettore Gigante, Stefano Ridolfi, and Sergio Augusto Barcellos Lins. "Characterisation of corrosion products on copper-based artefacts: potential of MA-XRF measurementsties of MA-XRF measurement." ACTA IMEKO 10, no. 1 (March 31, 2021): 136. http://dx.doi.org/10.21014/acta_imeko.v10i1.859.

Full text

Abstract:

The use of macro-X-ray fluorescence (MA-XRF) scanners is now widespread in cultural heritage applications. However, its use for the characterisation of metallic works of art is still limited. In this study, a novel portable MA-XRF scanner prototype was tested on artificially corroded copper samples to assess its analytical capabilities on corroded metals, yielding information on the spatial distribution of the corrosion products grown on the metal’s surface. A multi-analytical approach was used to thoroughly characterise the copper samples and compare the obtained results to verify the reliability of the MA-XRF data. The prototype was able to obtain distribution maps of different elements, such as sulphur and chlorine, which can be directly correlated to different corrosion products. With the use of imaging filtering techniques, it was possible to investigate the stratification of the corrosion product layers and observe gradients in the distribution of certain elements.

APA, Harvard, Vancouver, ISO, and other styles

44

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

45

NAKAGAWA, Motohiro, Syuji IKUTA, Takeshi TAKAGI, Atsushi HATTORI, and Toyoaki MIYAGAWA. "EXPERIMENTAL STUDY ON INSPECTION OF CARBONATION-INDUCED CORROSION WITH HALF-CELL POTENTIAL MEASUREMENT." Doboku Gakkai Ronbunshu, no. 781 (2005): 21–34. http://dx.doi.org/10.2208/jscej.2005.781_21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Ramón, J. E., J. M. Gandía-Romero, R. Bataller, M. Alcañiz, M. Valcuende, and J. Soto. "Potential step voltammetry: An approach to corrosion rate measurement of reinforcements in concrete." Cement and Concrete Composites 110 (July 2020): 103590. http://dx.doi.org/10.1016/j.cemconcomp.2020.103590.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Zhang, Yaping, Qiong Feng, Lianqing Yu, Chi-Man Lawrence Wu, Siu-Pang Ng, and Xiao Tang. "Numerical modelling of buried pipelines under DC stray current corrosion." Journal of Electrochemical Science and Engineering 9, no. 2 (February 28, 2019): 125–34. http://dx.doi.org/10.5599/jese.567.

Full text

Abstract:

Corrosion of buried pipelines caused by stray currents is becoming a serious industrial and environmental problem. It is therefore necessary to study corrosion mechanisms of buried pipelines under DC stray currents in order to propose effective anti-corrosion measures. Since measurement of the potential is one of important ways to identify stray current intensity, the COMSOL Multiphysics software was used to simulate stray current corrosion dynamics of buried pipelines. It was also used to calculate the distribution and intensity changes of electrolyte potential in the cathodic protected system by solving Laplace’s three-dimensional equation. The obtained results showed that increased applied voltage leads to more positive shift of a pipeline potential, resulting in acceleration of stray current corrosion. On the contrary, increased soil resistivity can retard the corrosion process. The protected pipeline with a sacrificial anode suffers less corrosion interference than unprotected pipeline. Two crossed arrangement of pipelines makes no difference in corrosion of protected pipeline, but affects greatly on unprotected pipeline.

APA, Harvard, Vancouver, ISO, and other styles

48

Abidin, Z. H. Z., K. Ramesh, R. M. Taha, R. Puteh, and A. K. Arof. "Studies on the Corrosion Protection Property of Acrylic Resin Mixed with Curcumin and Dammar." Materials Science Forum 517 (June 2006): 278–80. http://dx.doi.org/10.4028/www.scientific.net/msf.517.278.

Full text

Abstract:

The corrosion protection property of the coating consisting of acrylic resin mixed with curcumin and dammar was investigated by immersing in 3% NaCl solution using potential - time measurement. The investigation was performed until corrosion occurred at the coating and substrate interface. As the coating degraded the penetration of electrolyte, the potential value of the coated sample decreases to a value of – 0.65 V. In this study the coating with pigment volume concentration of KC30% can withstand against corrosion by 3% NaCl solution.

APA, Harvard, Vancouver, ISO, and other styles

49

ZHAO, WENGUI, JINGUO WANG, JINGQI HOU, and QICHUAN JIANG. "EFFECT OF SCANDIUM ON THE CORROSION BEHAVIOR OF THE CASTING Al-Cu ALLOYS IN NACL SOLUTION." International Journal of Modern Physics B 23, no. 06n07 (March 20, 2009): 978–83. http://dx.doi.org/10.1142/s0217979209060336.

Full text

Abstract:

Corrosion behavior of the casting Al - Cu alloys with and without Sc addition was studied by both the immersion test and electrochemical measurement methods. The results show that pitting corrosion was found on the surfaces of these alloys in 3.5 wt .% NaCl solution, while the corrosion resistance of the Al - Cu alloys with Sc is better than that of the Al - Cu alloy without Sc . With increasing Sc content, the corrosion resistance of the present Al - Cu alloys varies significantly, and the 0.1 wt .% Sc alloy has the best corrosion resistance. Also, the corrosion potential of the present alloys with Sc is shifted positively compared with that of the alloy without Sc by electrochemical measurement, indicating that the alloys with Sc have better corrosion resistance. The microstructures of the Al - Cu alloys change from the coarse grains to the fine equiaxed grains due to Sc addition, which is responsible for the reduced susceptibility to corrosion and the enhanced corrosion resistance of the present alloys.

APA, Harvard, Vancouver, ISO, and other styles

50

Li, Ximing, and Cheng Sun. "Synergistic Effect of Carbamide and Sulfate Reducing Bacteria on Corrosion Behavior of Carbon Steel in Soil." International Journal of Corrosion 2018 (August 1, 2018): 1–14. http://dx.doi.org/10.1155/2018/7491501.

Full text

Abstract:

Synergistic effect of carbamide and sulfate reducing bacteria (SRB) on corrosion behavior of carbon steel was studied in soils with moisture of 20% and 30%, by soil properties measurement, weight loss, polarization curve, and electrochemical impedance spectroscopy. The results show that carbamide decreased the soil redox potential and increased soil pH. In soil without SRB, carbamide made corrosion potential of Q235 steel much more positive and then inhibited corrosion. Meanwhile, in soil with SRB, 0.5 wt% carbamide restrained SRB growth and inhibited biocorrosion of Q235 steel. Corrosion rate of carbon steel decreased in soil with 30% moisture compared with that with 20% moisture.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Corrosion Potential Measurement'

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