Journal articles: 'Corrosion resistant materials'

1

Bond, S. H. "‘Corrosion resistant materials handbook’." British Corrosion Journal 21, no. 3 (January 1986): 148–50. http://dx.doi.org/10.1179/000705986798272145.

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Walker, P. A. "Corrosion resistant materials handbook." Materials & Design 8, no. 2 (March 1987): 129. http://dx.doi.org/10.1016/0261-3069(87)90126-9.

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Ndukwe, Agha Inya, Chukwuma Daniel Okolo, and Benjamin Uchenna Nwadirichi. "Overview of corrosion behaviour of ceramic materials in molten salt environments." Zastita Materijala 65, no. 2 (June 15, 2024): 202–12. http://dx.doi.org/10.62638/zasmat1128.

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This study reviewed previous studies between the years 2015 and 2021 on how ceramic materials degraded in the presence of molten salt environments. The processes of corrosion resistance of various ceramic compositions subjected to various molten salt compositions and temperatures were also scrutinized. The results offer important new insights into the variables affecting ceramics' corrosion behaviour and the production of corrosion products. The reported result reveals that the ceramic material with the composition (Sm0.5Sc0.5)2Zr2O7 performed better than that of Sm2Zr2O7 in terms of hot corrosion resistance in molten salt (V2O5 + Na2SO4). It has also been reported that corrosion behaviour is influenced by particle size. Notably, zirconia (n-YSZ) with nanoscale grain sizes was more susceptible to hot corrosion, which was explained by increased specific surface areas. On the other hand, sintering and additives have been found to enhance corrosion resistance. The Y-Y2Si2O7 ceramic's resistance to corrosion in (V2O5 + Na2SO4) molten salt was enhanced by the addition of alumina. The results of these investigations help us understand how corrosion works and what influences ceramic materials' susceptibility to deterioration in molten salt media. This information can direct the creation of more corrosive-resistant ceramic materials for use in high-temperature environments or molten salt-based energy systems, among other corrosive uses.

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Muradyan, Sarkis, M. V. Kostina, V. S. Kostina, Ludmila Rigina, and Viktor M. Timokhin. "Cast High-Strength Wear- and Corrosion-Resistant Austenitic Nitrogen Steel for Fittings Used in Shipbuilding." Key Engineering Materials 909 (February 4, 2022): 41–47. http://dx.doi.org/10.4028/p-iqrjh9.

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The paper presents the results of studies of a new cast high-strength austenitic corrosion-resistant steel, which can be successfully used in shipbuilding for the manufacture of fittings. The authors included data on the structural-phase state of steel, the results of evaluating the mechanical properties, wear and corrosion resistance of the metal of castings in the cast and heat-treated state. The mechanical properties of steel are considered in detail in a wide temperature range. The impact strength was considered at low temperatures and static strength at 20 to 350 ° C. It is shown that steel has higher mechanical and corrosive properties in a wide temperature range than those of traditional stainless steels. The corrosion resistance of steel is considered. This is intergranular and pitting corrosion; the main types of corrosion are peculiar for shipbuilding. It has been shown that cast steel is superior to traditional corrosion-resistant steels in pitting corrosion resistance estimated by the pitting coefficient PREN and the critical temperature of pitting. The new cast steel has the same wear resistance as Hadfield steel.

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Jacobson, Nathan D., and Jude Iroh. "Shape Memory Corrosion-Resistant Polymeric Materials." International Journal of Polymer Science 2021 (June 29, 2021): 1–18. http://dx.doi.org/10.1155/2021/5558457.

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Shape memory alloys, materials capable of being deformed and maintaining the deformation and additionally capable of returning to the initial position, are valued for a range of applications from actuators to flexible microdevices. Maintaining the properties that make them useful, their ability to deform and reform, requires that shape memory alloys must be protected against corrosion, in which the integration of shape memory polymers can act as a means of protection. Thus, this review is to highlight the utility of self-healing shape memory polymers as a means of corrosion inhibition. Therefore, this review discusses the benefits of utilizing self-healing shape memory polymers for the protection of shape memory, several types of self-healing polymers that could be used, means of improving or tailoring the polymers towards specific usages, and future prospects in designing a shape memory polymer for use in corrosion inhibition.

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Hihara, Lloyd H. "Advanced materials for corrosion resistant coatings." Corrosion Reviews 36, no. 2 (April 25, 2018): 115–16. http://dx.doi.org/10.1515/corrrev-2018-0005.

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Nurkulov, Fayzulla, Umida Ziyamukhamedova, Erkin Rakhmatov, and Jasur Nafasov. "Slowing down the corrosion of metal structures using polymeric materials." E3S Web of Conferences 264 (2021): 02055. http://dx.doi.org/10.1051/e3sconf/202126402055.

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This article examines the resistance of corrosion-resistant polymeric materials to chemical reagents and the degree of corrosion, taking into account the direction of corrosion processes. One of the main factors that determined the corrosion rate is air humidity and dust released into the atmosphere during industrial emissions. Mixtures based on polymer materials can be used to gum up chemical apparatus and equipment; for corrosion protection, expensive materials are required. The sample is conditioned for 30 months at (23 ± 2) 0С, relative humidity (50 ± 5) %, and the thickness of the sample is determined. Resistance to chemical reagents the change in mass of samples of polymeric materials at a temperature of 35 0C for 3 months was analyzed. It was also found that by determining the corrosion rate (grade St3) by storing steel plates in a different exposure environment for 50 days. As a result, the corrosion rate of steel anti-corrosion coatings is lower than the control sample. According to the data obtained, it was found that the chloro-sulfonated polyethylene compositions are resistant to various organic solvents, acids, alkalis, oxidizing agents, and others.

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Lee, Byoung Ho, Min Ho Jo, and Yun Ha Yoo. "The Effect of Flue Gas Environment on the Corrosion Behavior of the Sulfuric Acid Dew-Point Corrosion Resistant Steel." Materials Science Forum 941 (December 2018): 1705–9. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1705.

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In order to compare the corrosion resistance of conventional low carbon steel, Cu containing low carbon steel for sulfuric acid dew-point corrosion inhibition, and stainless 409L, immersion tests were carried out in 50 wt.% sulfuric acid. The effects of HCl concentraion on the corrosion behavior in a fixed sulfuric acid concentration (16.9 vol.%) was also investigated by immersion test. In addition to immersion test, field test in a thermal plant was carried out for 10 months. As a result, it was confirmed that Cu-containing dew-point corrosion resistent steel has the highest corrosion resistance compared with other materials. To verify superior corrosion resistence of dew-point corrosion resistant steel, surface morpology after various test was observed by SEM. It was found that surface corroded product of the dew-point corrosion resistant steel was much denser and thicker compared with the other steel.

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Umraliev, Baurzhan T., Farit A. Agzamov, Malik Z. Taskinbaev, and Aydyngali K. Seitov. "Obtaining lightweighted cementing materials from local raw materials for cementing wells in corrosion-active environment." Kazakhstan journal for oil & gas industry 2, no. 1 (March 15, 2020): 70–82. http://dx.doi.org/10.54859/kjogi95610.

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The study is devoted to the analysis of the current conditions for cementing of deepwells in Western Kazakhstan and the development of the theoretical foundations for obtaining lightweight corrosion-resistant cementing materials using local raw materials. This paper presents the theoretical justification for reducing the density of grouting materials and increasing the corrosion resistance of the resulting grouting mortars and stone with the addition of natural carbonate materials for the presence of acidic aggressive components (hydrogen sulfide and carbon dioxide) in the formation fluids. To obtain a homogeneous dense structure of cement stone, disintegration technology is justified. During the research, both standard and special methods were used to study the properties of grouting materials in a corrosive environment. Processing of experimental data and planning of the experiment was carried out using methods of mathematical statistics.

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Qiu, Ming Min, Hao Wang, Xu Wu, Hong Qun Tang, and Guang Cai Su. "Study on the Corrosion Resistance of High Boron Iron-Based Alloy." Applied Mechanics and Materials 268-270 (December 2012): 326–29. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.326.

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Being compared with traditional wear resistant materials, the corrosion resistance of high boron iron-based alloy at 25°Cand at 60°Care researched respectively. The results show that the corrosion resistance of wear-resistant alloys decline at high temperature. At 25°C and at 60°C, though the corrosion resistance of high chromium cast iron is a little higher than that of high boron iron-based alloy in acid medium (PH=3), high boron iron-based alloy’s corrosion resistance is the best among these three materials in neutral medium (PH=7) and in alkaline medium (PH=12).

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Wu, Guang Feng, Xiao Bin Zhang, and Wei Wu. "Microstructure and Corrosion Resistant Property Research of Super 304H and TP347H Heat-Resistant Steel Welding Joint." Advanced Materials Research 295-297 (July 2011): 1402–7. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1402.

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Microstructure of Super 304H and TP347H austenitic heat resistance steel welding joint by handwork argon tungsten-arc welding and electro-chemical corrosion property of weld metal and two base materials were investigated by SEM and M273 constant potential rectifier. The results shows that microstructure of the weld metalwere austenitic matrix + δ ferrite; In 5% HCl Solution, corrosion resistant capabilities were super 304H base material＞ weld metal＞TP347H base material; in 9.8% H2SO4 Solution, corrosion resistant capabilities were Super 304H base material＞TP347H base material＞ weld metal; Super 304H and TP347H austenitic heat resistance steel welding joint has better corrosion resistant property in HCl solution than in H2SO4 solution; Inter-crystalline corrosion results were consistence to results electro-chemical corrosion experiment in 9.8% H2SO4 solution.

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Liang, Zhi Yuan, and Qin Xin Zhao. "Research on Dew Point Corrosion of Materials." Applied Mechanics and Materials 281 (January 2013): 441–47. http://dx.doi.org/10.4028/www.scientific.net/amm.281.441.

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To solve the problem of power station boilers' high exhaust temperature and the demand of the dewpoint corrosion prevention and control in the process of flue gas deep cooling, We chose dewpoint corrosion resistant steels BNS, ND and 316L steel as studied objects, which were in situ tested on a boiler of 1000 MW pulverized coal-fired power plant. The results show that 316 L steel is performing superior corrosion resistance. Iron oxides and a small amount of sulphate and chlo-rate are the corrosion products, and the suitable tube metal wall temperature is recommended as 80°C which can avoid the coupling effect between dewpoint corrosion and viscous ash deposition.

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Los’, I. S., A. E. Rozen, A. V. Dub, A. E. Korneev, S. Yu Kireev, I. L. Kharina, and I. A. Safonov. "REGULARITIES OF CREATION OF LAYERED METAL CORROSION-RESISTANT MATERIALS WITH INTERNAL PROTECTOR." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 11(246) (November 26, 2020): 24–30. http://dx.doi.org/10.35211/1990-5297-2020-11-246-24-30.

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In this article regularities of the creation of laminated metal corrosion-resistant materials with an internal protector obtained by explosion welding are considered. For the first time, a laminated material is considered as a technical system. A systematic approach was used to construct the configuration of layered materials. The functions of individual elements are identified, the nature of the connections is established, and the complexity of the system is assessed. Corrosion tests were carried out, indicators of corrosion resistance were calculated by varying the number of protected and protective layers in comparison with monometallic material. An assessment of the economic efficiency of using laminated metal corrosion-resistant materials with an internal protector is carried out in comparison with monometallic and bimetallic materials.

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14

Keiser, J. R., A. R. Olsen, and S. Ibarra. "Corrosion-Resistant materials for coal liquefaction systems." Journal of Materials for Energy Systems 7, no. 2 (September 1985): 193–201. http://dx.doi.org/10.1007/bf02833564.

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Stellnberger, Karl-Heinz. "Key to development of corrosion-resistant materials." ADHESION ADHESIVES&SEALANTS 10, no. 2 (February 2013): 26–29. http://dx.doi.org/10.1365/s35784-013-0160-y.

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16

Hassan, Ata M., and A. U. Malik. "Corrosion resistant materials for seawater RO plants." Desalination 74 (January 1989): 157–70. http://dx.doi.org/10.1016/0011-9164(89)85048-9.

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17

Ridgway, P. "Corrosion and chemical resistant masonry materials handbook." Construction and Building Materials 1, no. 1 (March 1987): 58. http://dx.doi.org/10.1016/0950-0618(87)90067-5.

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18

Rozen, A. E., I. S. Los`, D. B. Kryukov, G. V. Kozlov, and A. A. Rozen. "New Multilayer Corrosion Resistant Materials for Nuclear Power Engineering." Applied Mechanics and Materials 770 (June 2015): 40–44. http://dx.doi.org/10.4028/www.scientific.net/amm.770.40.

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The authors developed a new class of multilayer materials that feature high corrosion resistance in halogenide-containing media. Corrosion resistance is provided by the multilayer structure. The principle of “sacrificial pitting protection” was formulated. The corrosion resistance tests were carried out. Explosive welding technology was introduced for fabrication of multilayer materials. It is suggested to use the multilayer materials as a structural material in construction of reservoirs for liquid radioactive waste.

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Lv, Shanglin, and Kefei Li. "Semiconducting Behaviour and Corrosion Resistance of Passive Film on Corrosion-Resistant Steel Rebars." Materials 15, no. 21 (October 31, 2022): 7644. http://dx.doi.org/10.3390/ma15217644.

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Chloride-induced corrosion of steel rebars is one of the major causes of the premature failures of reinforced concrete structures served in different environments. This paper investigates the semiconducting behaviour and corrosion resistance of the passive film formed on the corrosion-resistant rebars exposed to simulated concrete pore solutions with different pH values and chloride concentrations. The electronic properties of the passive film were studied using potentiodynamic measurements and capacitance measurements (Mott–Schottky analysis). The results indicate that, firstly, the passive film of corrosion-resistant steel rebar shows n-type semiconducting behaviour with shallow and deep donor states in the band gap during passivation, and the deep donor energy level of corrosion-resistant steel rebar passive film is not sensitive to the decreasing pH value; secondly, under the same conditions, the passive film of corrosion-resistant rebars has a larger negative flat-band potential and thicker space charge layer than hot-ribbed rebars; thirdly, n-type semi-conductivity at a higher potential disappears once the chloride concentration at the rebar surface attains the chloride threshold value; and finally, a reverse charge layer forms on the surface of CR rebar at 0.50 V potential.

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20

Nielsen, K. "Metallic materials in Danish supply water systems." Water Supply 1, no. 3 (June 1, 2001): 83–90. http://dx.doi.org/10.2166/ws.2001.0055.

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Characteristic corrosion phenomena and materials selection in hard supply water areas in Denmark are reviewed. Both corrosion failures and metal release are described. Even though good protective layers can be formed in the majority of cast iron pipes, the ease of installation and the corrosion resistance of plastic pipes result in the use of medium- and high-density polyethylene and polyvinylchloride (PEM, PEH and PVC) for new pipes. Corrosion is problematic in domestic pipes. Due to localised corrosion, selective attack of the zinc-layer and zinc release, galvanised steel gives too many problems. The copper release from copper pipes is too high after stagnation. The tendency is to preferentially use the more resistant materials such as stainless steel and crosslinked polyethylene (PEX), for domestic pipes. Possible higher microbial growths in plastic pipes are under investigation.

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Nikiforov, Aleksey V., Irina M. Petrushina, Jens Oluf Jensen, and Niels J. Bjerrum. "Corrosion Behavior of Construction Materials for Intermediate Temperature Steam Electrolysers." Advanced Materials Research 699 (May 2013): 596–605. http://dx.doi.org/10.4028/www.scientific.net/amr.699.596.

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Different corrosion resistant stainless steels, nickel-based alloys, pure nickel, Ta-coated stainless steel (AISI 316L), niobium, platinum and gold rods were evaluated as possible materials for use in the intermediate temperature (200-400 °C) acidic water electrolysers. The corrosion resistance was measured under simulated conditions (molten KH2PO4) corresponding to the proton-conducting solid acids or transition metal phosphates as electrolytes. It was shown that, unlike at temperatures below 200 °C, gold is unstable with respect to corrosion in molten KH2PO4. Platinum demonstrated high corrosion resistance and the anodic and cathodic limits were for the first time found for the electrolyte. Nickel, niobium, Inconel®625, Hastelloy®C-276 and Ta-coated stainless steel (AISI 316L) demonstrated high corrosion stability and can be recommended as construction materials for bipolar plates.

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Kajimura, Haruhiko, and Hiroo Nagano. "Corrosion Environment and Corrosion Resistant Materials for Nuclear Fuel Reprocessing Plants." Bulletin of the Japan Institute of Metals 31, no. 8 (1992): 725–33. http://dx.doi.org/10.2320/materia1962.31.725.

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Serekpayeva, M. A., G. А. Kokayeva, R. K. Niyazbekova, and S. Kardybai. "Investigation of the properties of composite materials based on epoxy resins with microsilica additives." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 318, no. 3 (September 12, 2021): 63–70. http://dx.doi.org/10.31643/2021/6445.29.

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The outcomes of studying epoxy-based composite materials supplemented with microsilica are provided in the article. Microsilica was used as a filler. The samples were produced on the epoxy ED-20 basis supplemented with 2, 5 and 10 mas. % of microsilica. The structure and size of finely dispersed filler particles were defined. The obtained composites were tested for resistance to the effect of variable temperatures, corrosive, and abrasion. The study outcomes proved that samples supplemented with 2% of microsilica are more resistant to acid and alkali as well as to petrol than those ones supplemented with 25% of microsilica. Besides the amount of the filler from 2 to 10% doesn’t sufficiently affect the resistance to variable temperatures. When microsilica is added to epoxy resin, it causes scuff resistance increase. The conducted testing proved that the developed composite materials are resistant to the effect of variable temperatures, corrosive, and abrasion. This enables to use these materials as coatings and anti-corrosion protection during machine maintenance.

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Yao, Liming, Aditya Ramesh, Zongheng Fan, Zhongmin Xiao, Guanhai Li, Quihui Zhuang, and Jing Qiao. "Interface Analysis between Inconel 625 and Cobalt-Chromium Alloy Fabricated by Powder Bed Fusion Using Pulsed Wave Laser." Materials 16, no. 19 (September 28, 2023): 6456. http://dx.doi.org/10.3390/ma16196456.

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A few components used in the aerospace and petrochemical industries serve in corrosive environments at high temperatures. Corrosion-resistant metals or unique processes, such as coating and fusion welding, are required to improve the performance of the parts. We have used laser powder bed fusion (LPBF) technology to deposit a 5 mm thick corrosion-resistant CoCrMo layer on a high-strength IN625 substrate to improve the corrosion resistance of the core parts of a valve. This study found that when the laser volumetric energy density (EV) ≤ 20, the tensile strength increases linearly with the increase in EV, and the slope of the curve is approximately 85°. The larger the slope, the greater the impact of EV on the intensity. When EV > 20, the sample strength reaches the maximum tensile strength. When the EV increases from 0 to 20, the fracture position of the sample shifts from CoCrMo to IN625. When EV ≤ 38, the strain increases linearly with the increase in EV, and the slope of the curve is approximately 67.5°. The sample strain rate reaches the maximum when EV > 38. Therefore, for an optimal sample strength and strain, EV should be greater than 38. This study provides theoretical and technical support for the manufacturing of corrosion-resistant dissimilar metal parts using LPBF technology.

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Farag, Ahmed A. "Applications of nanomaterials in corrosion protection coatings and inhibitors." Corrosion Reviews 38, no. 1 (February 25, 2020): 67–86. http://dx.doi.org/10.1515/corrrev-2019-0011.

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AbstractVarious methodologies are practically used to control corrosion. Coatings are the most widely used to protect metals against corrosion. However, due to the weak resistance of polymer coating against the penetration of corrosive solution to the metal/coating interface, the long-term corrosion resistance of the polymer coating is reduced gradually. Recently, nanoparticles have been added to coatings to improve their chemical, mechanical and optical properties. Nanocoatings either have constituents in the nanoscale or are made out of layers that are under 100 nm. Nanocoatings are used effectively to lessen the impact of a corrosive environment due to its various preferences, such as surface hardness, adhesive quality, long haul and, additionally, high-temperature corrosion opposition, and to improve its tribological properties, and so forth. Moreover, nanocoatings can be utilized in more slender and smoother thickness, which permits adaptability in equipment design and lower upkeep and working expenses. This review covers applications related to the management of metal corrosion, including the use of nanomaterials to produce high-performance corrosion inhibitors and corrosion-resistant coatings.

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Zhu, Shidong, Ke Wang, Haixia Ma, and Pan Dong. "Adsorption Characteristics between Ti Atoms of TiO2(100) and Corrosive Species of CO2-H2S-Cl− System in Oil and Gas Fields." Materials 16, no. 8 (April 16, 2023): 3129. http://dx.doi.org/10.3390/ma16083129.

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The service environment of OCTG (Oil Country Tubular Goods) in oil and gas fields is becoming more and more severe due to the strong affinity between ions or atoms of corrosive species coming from solutions and metal ions or atoms on metals. While it is difficult for traditional technologies to accurately analyze the corrosion characteristics of OCTG in CO2-H2S-Cl− systems, it is necessary to study the corrosion-resistant behavior of TC4 (Ti-6Al-4V) alloys based on an atomic or molecular scale. In this paper, the thermodynamic characteristics of the TiO2(100) surface of TC4 alloys in the CO2-H2S-Cl− system were simulated and analyzed by first principles, and the corrosion electrochemical technologies were used to verify the simulation results. The results indicated that all of the best adsorption positions of corrosive ions (Cl−, HS−, S2−, HCO3−, and CO32−) on TiO2(100) surfaces were bridge sites. A forceful charge interaction existed between Cl, S, and O atoms in Cl−, HS−, S2−, HCO3−, CO32−, and Ti atoms in TiO2(100) surfaces after adsorption in a stable state. The charge was transferred from near Ti atoms in TiO2 to near Cl, S, and O atoms in Cl−, HS−, S2−, HCO3−, and CO32−. Electronic orbital hybridization occurred between 3p5 of Cl, 3p4 of S, 2p4 of O, and 3d2 of Ti, which was chemical adsorption. The effect strength of five corrosive ions on the stability of TiO2 passivation film was S2− > CO32− > Cl− > HS− > HCO3−. In addition, the corrosion current density of TC4 alloy in different solutions containing saturated CO2 was as follows: NaCl + Na2S + Na2CO3 > NaCl + Na2S > NaCl + Na2CO3 > NaCl. At the same time, the trends of Rs (solution transfer resistance), Rct (charge transfer resistance), and Rc (ion adsorption double layer resistance) were opposite to the corrosion current density. The corrosion resistance of TiO2 passivation film to corrosive species was weakened owing to the synergistic effect of corrosive species. Severe corrosion resulted, especially pitting corrosion, which further proved the simulation results mentioned above. Thus, this outcome provides the theoretical support to reveal the corrosion resistance mechanism of OCTG and to develop novel corrosion inhibitors in CO2-H2S-Cl− environments.

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Ghiban, Brandusa, Carmen Anca Safta, and Vlad Motoiu. "Stainless Steels as Erosion Resistant Materials for Hydraulic Machines." Key Engineering Materials 750 (August 2017): 75–79. http://dx.doi.org/10.4028/www.scientific.net/kem.750.75.

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The corrosion phenomena lead to serious modifications in the structure of metallic materials from which are manufactured the important active components of hydraulic machines. There are two important types of corrosion: cavitation and silt erosion (abrasive erosion), that are specific to machines which are producing energy [1, 2, 3]. As a corrosion mechanism, in hydrodynamic cavitation [4, 5], when cavitation bubbles implode on the solid surface of hydraulic machine component, the local pressure developed is high and can exceed the fatigue strength, yield point or compression strength of the material. Cavitation phenomenon can be produced in different ways. Four types of cavitation are described in the literature, looking for the method of producing, [6]: hydrodynamic cavitation, particle cavitation, acoustic cavitation, and optic cavitation. Abrasive erosion is the gradual degradation of a structure under the action of solid particles suspended in the working fluid. Impact and sliding erosion are the main categories of abrasive erosion approached in the literature by considering the mechanisms of which the abrasive particles act on the metallic surface, [2]. In the last decades the abrasive erosion phenomenon became a serious problem for the efficient operation of power plants, for instance in hydropower plants [7, 8]. Geothermal energy is the heat energy of the earth given by capturing the springs of heat water. In Romania the geothermal energy is used only for heating because the water has a low temperature and cannot be used to produce electric energy, only heat energy. So, although Romania is the third highest potential geothermal in Europe, practically electric energy from geothermal resource has a low thermal potential, [9]. A steam turbine is working at high rotational speed, high temperatures and using the working fluid which could be steam or wet steam. The working fluid is composed of corrosive chemicals with an aggressive pH. For this reason the common problems of the geothermal steam turbine failures are given by fractures of the blades (rotor blades or stator blades).

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Kozhanova, Maria Yu, Marina P. Boronenko, and Vladimir I. Zelensky. "The production of corrosion alloy by self-propagating high-temperature synthesis." Yugra State University Bulletin 18, no. 2 (August 7, 2022): 22–29. http://dx.doi.org/10.18822/byusu20220222-29.

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The subject of research: Self-propagating high-temperature synthesis (SHS) is an energetically low-cost method for obtaining materials with desired properties. The purpose of research: Development and approbation of the method of self-propagating high-temperature synthesis. Methods and objects of research: For the synthesis of a corrosion-resistant material, a thermite mixture of Al (75 %) and Fe2O3 (25 %) and the addition of MoO3 with a variable mass fraction of 10 %, 15 %, 20 %, 25 % of thermite were taken. The composition and structure of the synthesized material were determined by XRD and metallography methods. Based on the properties of the physical properties of the obtained material (porosity, electrical conductivity) and its phase composition (MoO2, Al2O3, FeMoO4), samples obtained with a 15 % addition of MoO3 were selected for testing for corrosion resistance. Results of research: The paper presents the results of approbation of obtaining a corrosion-resistant material by the SHS method. Conducted tests for corrosion resistance established: the rate of continuous corrosion of the synthesized material (MoO3 15 %) was 0.2 mm / year, which is close in value to corrosion-resistant steels; high resistance of the synthesized material to technical salt when tested for 14 days with a concentrated solution of the reagent 0.18 ml * eq / l. The listed properties of the synthesized material confirm the possibility of obtaining corrosion-resistant materials by the SHS method, including those for operation in the Arctic.

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Kozhanova, Maria Yu, Marina P. Boronenko, and Vladimir I. Zelensky. "The production of corrosion alloy by self-propagating high-temperature synthesis." Yugra State University Bulletin 18, no. 2 (August 7, 2022): 22–29. http://dx.doi.org/10.18822/byusu20220222-29.

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The subject of research: Self-propagating high-temperature synthesis (SHS) is an energetically low-cost method for obtaining materials with desired properties. The purpose of research: Development and approbation of the method of self-propagating high-temperature synthesis. Methods and objects of research: For the synthesis of a corrosion-resistant material, a thermite mixture of Al (75 %) and Fe2O3 (25 %) and the addition of MoO3 with a variable mass fraction of 10 %, 15 %, 20 %, 25 % of thermite were taken. The composition and structure of the synthesized material were determined by XRD and metallography methods. Based on the properties of the physical properties of the obtained material (porosity, electrical conductivity) and its phase composition (MoO2, Al2O3, FeMoO4), samples obtained with a 15 % addition of MoO3 were selected for testing for corrosion resistance. Results of research: The paper presents the results of approbation of obtaining a corrosion-resistant material by the SHS method. Conducted tests for corrosion resistance established: the rate of continuous corrosion of the synthesized material (MoO3 15 %) was 0.2 mm / year, which is close in value to corrosion-resistant steels; high resistance of the synthesized material to technical salt when tested for 14 days with a concentrated solution of the reagent 0.18 ml * eq / l. The listed properties of the synthesized material confirm the possibility of obtaining corrosion-resistant materials by the SHS method, including those for operation in the Arctic.

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Toskovic, D., Milos Rajkovic, and D. Stanojevic. "Study of corrosion resistance of chromium-nickel steel in calcium - hypochlorite solution. Part 1. Steels uranus b6." Journal of Mining and Metallurgy, Section B: Metallurgy 38, no. 1-2 (2002): 75–91. http://dx.doi.org/10.2298/jmmb0202075t.

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Corrosion resistance of Cr - Ni (special steels) specimen is tested by electrochemical methods, numerical method of linear polarization and polarization resistance method in calcium-hypochlorite (Ca(OCl)2) solutions. With increasing of Ca(OCl)2 concentration, pH value of the solution increases, as well as active chlorine concentration and corrosion activity of the medium. According to the quantitative method of the corrosion resistance determination it can be concluded that the steels tested in 1 wt % Ca(OCl)2 solution are resistant, in 10 wt % solution constant, and in 50 wt % suspension less resistant. URANUS B6 showed the best corrosion resistance of all tested chromium - nickel steels in all tested corrosion mediums.

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Hussain, Mahmoud. "Synthesis, Characterization and evaluation of new." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 2 (December 16, 2016): 3956–63. http://dx.doi.org/10.24297/jac.v12i2.2153.

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ABSTRACT A new polymer surfactant derived from cis-1,4-cyclohexane bis(methylamine) and ethylenediamintetraacetic acid [2,2'-(1,12-bis(4-(aminomethyl)cyclohexyl)-3,10-dioxo-2,5,8,11-tetraazadodecane-5,8-diyl) diacetic acid ] was synthesized and characterized by FTIR and 1HNMR. A series of electrochemical measurements, including corrosion potential and corrosion current has been made on the surfactant for carbon steel samples in corrosive environment. Results showed that the surfactant can offer some degrees of protection in the corrosive environments. The corrosion study of this polymer outline that it have a good resistant to the corrosion of carbon steel in 0.1 M solution of HCl, which can be indicate to uses as anti-corrosion materials

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Zhang, Weitao. "Exploration And Research on The Durability of FRP Composite Materials." Highlights in Science, Engineering and Technology 51 (May 16, 2023): 169–74. http://dx.doi.org/10.54097/hset.v51i.8260.

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Concrete cracking caused by steel corrosion is the main form of concrete structure deterioration at present. In order to solve the problem of steel corrosion, people begin to seek to replace steel with corrosion-resistant materials. Fiber reinforced polymer (FRP) has the advantages of high strength to mass ratio, good fatigue resistance, simple construction, corrosion resistance, etc., and has been widely used in engineering in recent years. In this paper, it analyzes the research status of FRP composites and introduces the properties of different kinds of FRP composites in detail. Then, by comparing with ordinary steel bar, the advantages of steel bar containing FRP material are highlighted. Subsequently, the durability of FRP composite materials in corrosion environment is studied. Finally, this paper introduces the practical application of FRP composites in engineering. The results are helpful to popularize the application of FRP composites in practical engineering.

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Lowry, Bill, Andrew Louden, Robin Jerman, and Tatiana Pyatina. "Corrosion-Resistant Plug Materials for Geothermal Well Fluid Control." Materials 15, no. 19 (September 27, 2022): 6703. http://dx.doi.org/10.3390/ma15196703.

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Conventional cements and plugs are challenged by corrosion in CO2-rich and extreme geothermal environments, due to the hostile chemistry and high temperatures. Thermite-based sealing and well intervention technologies are being applied in the oil and gas industry, combining the energy delivery capability of thermite materials with the sealing characteristics of low melt temperature alloys. The thermite reaction products (ceramics) and the sealing alloys used in these plugs both have very attractive corrosion properties, and their operating envelopes extend into geothermal conditions. Thermite plugs and platforms, without supplemental sealing materials, have been considered for nuclear waste isolation, carbon sequestration, and geothermal applications due to the geochemical stability of the ceramic product and its very high service temperature. This study addresses corrosion resistance of the thermite reaction products. A range of engineered thermite systems which yield thermite reaction products including pure aluminum oxide, feldspar, or aluminosilicate solid solutions (in addition to the iron produced in thermite reactions) was developed. These materials were evaluated for their strong acid resistance (pH 1), carbonate resistance (sodium carbonate) and thermal shock resistance (600 °C heating → cold water quenching repeated three times). Performance of different materials was evaluated based on the changes in mechanical properties, water-fillable porosity, phase changes under stress conditions. The aluminosilicate product exhibited very good corrosion resistance, both from material loss and strength perspectives, while the other products performed with varying degrees of stability. This paper presents the results of the thermite corrosion studies and describes the novel tools being deployed, and under development, to satisfy challenging barrier and intervention applications.

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Krivoborodov, Yu R., Ivan Y. Burlov, and Thet Naing Myint. "Corrosion-Resistant Cements." Solid State Phenomena 335 (July 29, 2022): 195–200. http://dx.doi.org/10.4028/p-e3x8g2.

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The possibility of increasing the basic properties of concrete products by using Portland cement with additions of sulfated clinkers as a binder is considered. It was found that when the binder is hydrated, aluminate and ferruginous ettringite are formed, which reinforce the hardening structure of the stone, increase its strength properties and resistance to the corrosive effect of sulfates.

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Presuel-Moreno, F., M. A. Jakab, N. Tailleart, M. Goldman, and J. R. Scully. "Corrosion-resistant metallic coatings." Materials Today 11, no. 10 (October 2008): 14–23. http://dx.doi.org/10.1016/s1369-7021(08)70203-7.

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Mirzayev, Matlab N., Anca C. Parau, Lyubomir Slavov, Mihaela Dinu, Dimitar Neov, Zdravka Slavkova, Evgeni P. Popov, et al. "TiSiCN as Coatings Resistant to Corrosion and Neutron Activation." Materials 16, no. 5 (February 23, 2023): 1835. http://dx.doi.org/10.3390/ma16051835.

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The aim of the present paper was to evaluate the effect of neutron activation on TiSiCN carbonitrides coatings prepared at different C/N ratios (0.4 for under stoichiometric and 1.6 for over stoichiometric). The coatings were prepared by cathodic arc deposition using one cathode constructed of Ti88 at.%-Si12 at.% (99.99% purity). The coatings were comparatively examined for elemental and phase composition, morphology, and anticorrosive properties in 3.5% NaCl solution. All the coatings exhibited f.c.c. solid solution structures and had a (111) preferred orientation. Under stoichiometric structure, they proved to be resistant to corrosive attack in 3.5% NaCl and of these coatings the TiSiCN was found to have the best corrosion resistance. From all tested coatings, TiSiCN have proven to be the most suitable candidates for operation under severe conditions that are present in nuclear applications (high temperature, corrosion, etc.).

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Alapati, Prasanth, Mehdi Khanzadeh Moradllo, Neal Berke, M. Tyler Ley, and Kimberly E. Kurtis. "Designing corrosion resistant systems with alternative cementitious materials." Cement 8 (June 2022): 100029. http://dx.doi.org/10.1016/j.cement.2022.100029.

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Kaneko, Michio. "Scope as a Researcher for Corrosion Resistant Materials." Zairyo-to-Kankyo 70, no. 8 (August 10, 2021): 249. http://dx.doi.org/10.3323/jcorr.70.249.

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Ronkin, G. M., and Yu O. Andriasyan. "New Corrosion- and Heat-Resistant Elastic Polymeric Materials." International Polymer Science and Technology 30, no. 6 (June 2003): 3–11. http://dx.doi.org/10.1177/0307174x0303000602.

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Liu, C. J., and J. Q. Peng. "Four Hot Corrosion Resistant Materials for IGT Blades." Procedia Engineering 130 (2015): 662–67. http://dx.doi.org/10.1016/j.proeng.2015.12.292.

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Kawamura, Hideaki, and Michio Nishi. "The Corrosion Resistant Materials for the Paper Industry." JAPAN TAPPI JOURNAL 60, no. 2 (2006): 197–203. http://dx.doi.org/10.2524/jtappij.60.197.

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Baltatu, Madalina Simona, Petrica Vizureanu, Andrei Victor Sandu, Nestor Florido-Suarez, Mircea Vicentiu Saceleanu, and Julia Claudia Mirza-Rosca. "New Titanium Alloys, Promising Materials for Medical Devices." Materials 14, no. 20 (October 9, 2021): 5934. http://dx.doi.org/10.3390/ma14205934.

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Titanium alloys are used in medical devices due to their mechanical properties, but also for their corrosion resistance. The natural passivation of titanium-based biomaterials, on the surface of which a dense and coherent film of nanometric thickness is formed, composed mainly of TiO2, determines an apparent bioactivity of them. In this paper, the method of obtaining new Ti20MoxSi alloys (x = 0.0, 0.5, 0.75, and 1.0) is presented, their microstructure is analyzed, and their electrochemical responses in Ringer´s solution were systematically investigated by linear polarization, cyclic potential dynamic polarization, and electrochemical impedance spectroscopy (EIS). The alloys corrosion resistance is high, and no evidence of localized breakdown of the passive layer was observed. There is no regularity determined by the composition of the alloys, in terms of corrosion resistance, but it seems that the most resistant is Ti20Mo1.0Si.

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Hashimoto, Koji. "Corrosion-Resistant Amorphous Alloys." CORROSION ENGINEERING 37, no. 5 (1988): 294–300. http://dx.doi.org/10.3323/jcorr1974.37.5_294.

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Peng, Dongdong, Kang Huang, Yuntao He, Zhan Zhang, Yi Wang, and Junsheng Wu. "Hybrid sol-gel coating incorporated with TiO2 nanosheets and anti-corrosive effects on AA2024-T3." Anti-Corrosion Methods and Materials 66, no. 2 (February 21, 2019): 215–21. http://dx.doi.org/10.1108/acmm-08-2018-1980.

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Purpose This paper aims to improve the anti-corrosive properties of aluminum alloy AA2024-T3 by coating of hybrid sol-gel coating incorporated with TiO2 nanosheets and to investigate the effect of nanosheets’ size on the improvement of corrosion-resistant performance. Design/methodology/approach A series of hybrid sol-gel films incorporated with varying amounts of TiO2 nanosheets were developed to enhance the corrosion protection performance of the bare metal. Scanning electron microscopy, transmission electron microscopy and atomic force microscopy were used to investigate the structure and morphology of the coatings obtained. In addition, the corrosion-resistant properties of the coatings were evaluated using salt spray test and electrochemical impedance spectroscopy. Findings The corrosion current was as low as 9.55 × 10-4 µA/cm2 and optimal positive corrosion potential reached −0.6 V when the size and loading amount of TiO2 nanosheet were optimized, resulting in a remarkable improvement in anti-corrosive properties. Originality/value This work first investigates the effect of incorporation of TiO2 nanoparticles on hybrid sol-gel coating on the improvement of anti-corrosive performance of aluminum alloy AA2024-T3.

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Xu, Di, Zibo Pei, Xiaojia Yang, Qing Li, Fan Zhang, Renzheng Zhu, Xuequn Cheng, and Lingwei Ma. "A Review of Trends in Corrosion-Resistant Structural Steels Research—From Theoretical Simulation to Data-Driven Directions." Materials 16, no. 9 (April 26, 2023): 3396. http://dx.doi.org/10.3390/ma16093396.

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This paper provides a review of models commonly used over the years in the study of microscopic models of material corrosion mechanisms, data mining methods and the corrosion-resistant performance control of structural steels. The virtual process of material corrosion is combined with experimental data to reflect the microscopic mechanism of material corrosion from a nano-scale to macro-scale, respectively. Data mining methods focus on predicting and modeling the corrosion rate and corrosion life of materials. Data-driven control of the corrosion resistance of structural steels is achieved through micro-alloying and organization structure control technology. Corrosion modeling has been used to assess the effects of alloying elements, grain size and organization purity on corrosion resistance, and to determine the contents of alloying elements.

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Lin, Cheng, and Yonggang Yao. "Corrosion-Resistant Coating Based on High-Entropy Alloys." Metals 13, no. 2 (January 20, 2023): 205. http://dx.doi.org/10.3390/met13020205.

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Metal corrosion leads to serious resource waste and economic losses, and in severe cases, it can result in catastrophic safety incidents. As a result, proper coatings are often employed to separate metal alloys from the ambient environment and thus prevent or at least slow down corrosion. Among various materials, high-entropy alloy coatings (HEA coating) have recently received a lot of attention due to their unique entropy-stabilized structure, superior physical and chemical properties, and often excellent corrosion resistance. To address the recent developments and remaining issues in HEA coatings, this paper reviews the primary fabrication methods and various elemental compositions in HEA coatings and highlights their effects on corrosion resistance properties. It is found that FeCoCrNi-based and refractory high-entropy alloy coatings prepared by the laser/plasma cladding method typically show better corrosion resistance. It also briefly discusses the future directions toward high-performing corrosion-resistant coatings based on HEA design.

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Joseph, Williams Ajuwaeze, Roland Tolulope Loto, Philip Babalola, and Joshua Okeniyi. "Analysis of the effect of Zea Mays husk particulate reinforcement on 1170 Aluminium corrosion in a simulated industrial environment." Key Engineering Materials 943 (March 29, 2023): 97–107. http://dx.doi.org/10.4028/p-6b99x5.

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The worldwide need for lightweight, high-quality, high-performance, and low-cost materials is prompting a change in emphasis from unreinforced materials to reinforced/composite materials. The mechanical properties of the MHP reinforced aluminum composite are compared to those of the unreinforced metal using the data on the corrosion performance of maize husk particulate reinforcement on high 1170 Aluminium alloy in 0.00625 M H2SO4, 3.5 wt.% NaCl and a mixture of both solutions was studied using weight loss technique to determine the corrosion rates of the specimens. Optical microscopic analysis was also carried out on the specimens to determine the effect of the reinforcement on the microstructural properties of the material before and after corrosion. The corrosion rates calculated from the weight loss study revealed differences in the corrosion characteristics of the specimens in the various solutions when compared to the control specimen. The presence of reinforcement in the matrix was discovered to positively impact the corrosion behavior of composite materials via the production of corrosion resistant oxides. The electrochemical properties of maize husk enhances the corrosion resistance of the composite due to its ability to form a protective oxide film and chemically resistant inclusions on the surface of the material.

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Łosiewicz, Bożena, Magdalena Popczyk, Tomasz Goryczka, Józef Lelątko, Agnieszka Smołka, and Piotr Kowalski. "Structure and Resistance to Electrochemical Corrosion of NiTi Alloy." Solid State Phenomena 203-204 (June 2013): 335–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.203-204.335.

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The NiTi alloy (50.6 at.% Ni) passivated for 30 min at 130°C by autoclaving has been studied towards corrosion resistance in aqueous solutions of 3% NaCl, 0.1 M H2SO4, 1 M H2SO4 and HBSS. Structure and thickness of the passive layer (TiO2, rutile) were examined by X-ray reflectivity method and high resolution electron microscopy. Corrosion behavior of this oxide layer was investigated by open circuit potential method and polarization curves. It was found that the corrosion resistance of the passivated NiTi alloy is strongly dependent on the type of corrosive environment. The higher corrosion resistance of the tested samples was revealed in sulfate solutions as compared to chloride ones. The highest resistance to electrochemical corrosion of the NiTi alloy was observed in 0.1 M H2SO4 solution. Susceptibility to pitting corrosion of the tested samples was observed which increased with the concentration rise of chlorine anions in solution. Electrochemical tests for 316L stainless steel carried out under the same experimental conditions revealed a weaker corrosion resistance in all solutions as compared to the highly corrosion resistant NiTi alloy.

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Yang, Chao, Pinghu Chen, Wenxing Wu, Liyuan Sheng, Yufeng Zheng, and Paul K. Chu. "A Review of Corrosion-Resistant PEO Coating on Mg Alloy." Coatings 14, no. 4 (April 9, 2024): 451. http://dx.doi.org/10.3390/coatings14040451.

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The corrosion problem of Mg alloy limits its application in many engineering fields. Plasma electrolytic oxidation (PEO) is an economical and eco-friendly technology that can create a dense oxide layer on Mg alloy, offering a solution to the corrosion issue. This research summarizes the use of PEO technology in developing corrosion-resistant coatings for Mg alloys and examines the growth mode and corrosion process of PEO coatings. It is concluded that current efforts to enhance the corrosion resistance of PEO coatings on Mg alloys can be categorized into two approaches: improving the internal structure of the coating and enhancing the phase composition. This includes optimizing coating thickness, roughness, and density; repairing micropores and cracks; and introducing corrosion-resistant compounds by doping. Micropores and cracks are identified as vulnerable points for corrosion, and sealing is an effective strategy to address this. By modifying the phase composition of the coating, corrosion occurrence can be minimized, significantly boosting the corrosion resistance of Mg alloys. Finally, future challenges and potential advancements in corrosion-resistant PEO coatings for Mg alloys are discussed.

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Dong, Fuyuan, Mingxu Zhang, Fan Peng, and Jianglong Zhang. "Preparation and Mechanical Properties of High Silicon Molybdenum Cast Iron Materials: Based on Deep Learning Model." Computational Intelligence and Neuroscience 2022 (September 26, 2022): 1–12. http://dx.doi.org/10.1155/2022/4825356.

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In the production and life of machines, wear is the main form of material failure. Many workpieces and equipment will produce friction and wear during use, causing energy and material consumption, resulting in huge economic losses. In the process of using engineering equipment, in order to improve the service life of the workpiece and improve the wear-resistant material, the research of the material itself must be closely linked with the wear mechanism. Among the antiwear materials, the application of high-chromium cast iron is the most common. The reason is that high-chromium cast iron has a series of advantages in performance, manufacturing technology, and price. However, high-chromium cast iron itself has high C content and high brittleness, resulting in defects in toughness and poor corrosion resistance. When working in harsh environments such as mechanical extrusion, high-strength wear, and chemical corrosion, cracking and deformation are prone to occur, corrosion and peeling, and another damage failure. High chromium cast iron must have a relatively stable structure, good strength and toughness, excellent wear resistance, and corrosion resistance. In this study, the static corrosion performance of high-chromium cast iron was tested to study the effects of Mo and V elements addition and content changes on corrosion resistance and vanadium, molybdenum, and subcritical treatment processes on the microstructure and properties of high-chromium cast iron, in order to obtain better performance. Lower cost high chromium cast iron castings. As a wear-resistant part, high-chromium cast iron castings are widely used in wear and can cope with harsh working environments, but their excellent hardness conditions bring certain defects in toughness and at the same time lack good corrosion resistance, in mechanical extrusion., high-strength wear, chemical corrosion, and other harsh environments are prone to damage and failure. Therefore, high-chromium cast iron should have dual properties, not only high hardness but also suitable for mud, sand, chemicals, and other media corrosion and wear resistance.

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Journal articles on the topic 'Corrosion resistant materials'

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