The addition of tara and quebracho colorado tannins remarkably reduces the corrosion rate of aluminum in near‐neutral and naturally aerated NaCl solutions. The experimental results (potentiodynamic polarization curves, corrosion potential measurements, scanning electron microscopy–energy‐dispersive X‐ray spectroscopy [SEM‐EDS] analysis on exposed surfaces) show that both tannins behave as a mixed‐type corrosion inhibitor of aluminum. In the absence of tannins, the SEM‐EDS analysis of the exposed samples demonstrates the accumulation of corrosion products and the existence of chlorinated compounds adsorbed on the metal surface. In the samples immersed in both tannins solutions, a more homogenous and compact layer is formed over the aluminum surface. Furthermore, in these layers chlorine was not found, revealing a high blocking capacity of the chloride adsorption when the tannins are present. Taking into account these findings, an inhibitory mechanism of aluminum corrosion is proposed. This mechanism is interphase inhibition, which involves the adsorption and incorporation of tannin molecules during the corrosion products passive layer formation, resulting in a protective three‐dimensional structure that retards both anodic and cathodic reactions.
{"title":"Tannins as interphase corrosion inhibitors for aluminum in near‐neutral chloride solutions","authors":"C. Byrne, Oriana D'Alessandro, C. Deyá","doi":"10.1002/maco.202112765","DOIUrl":"https://doi.org/10.1002/maco.202112765","url":null,"abstract":"The addition of tara and quebracho colorado tannins remarkably reduces the corrosion rate of aluminum in near‐neutral and naturally aerated NaCl solutions. The experimental results (potentiodynamic polarization curves, corrosion potential measurements, scanning electron microscopy–energy‐dispersive X‐ray spectroscopy [SEM‐EDS] analysis on exposed surfaces) show that both tannins behave as a mixed‐type corrosion inhibitor of aluminum. In the absence of tannins, the SEM‐EDS analysis of the exposed samples demonstrates the accumulation of corrosion products and the existence of chlorinated compounds adsorbed on the metal surface. In the samples immersed in both tannins solutions, a more homogenous and compact layer is formed over the aluminum surface. Furthermore, in these layers chlorine was not found, revealing a high blocking capacity of the chloride adsorption when the tannins are present. Taking into account these findings, an inhibitory mechanism of aluminum corrosion is proposed. This mechanism is interphase inhibition, which involves the adsorption and incorporation of tannin molecules during the corrosion products passive layer formation, resulting in a protective three‐dimensional structure that retards both anodic and cathodic reactions.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"65 1","pages":"798 - 810"},"PeriodicalIF":0.0,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89834856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E‐coated galvanized steel sheets are widespread parts of the automotive industry. Hence, the undermining of the organic coating due to defects is a crucial issue. The delamination of an e‐coating is simulated for different cyclic climate conditions using the finite element method to predict the corrosion behavior over several weeks. A semiempirical mixed potential theory model is developed incorporating the time‐of‐wetness, the temperature, and the effect of corrosion products. Furthermore, the spatial orientation of the sheets is considered in the simulation. The trends of experimental delamination widths of corrosion tests are well described by the simulation.
{"title":"Enhanced predictive corrosion modeling of crevice evolution at e‐coat defects under cyclic climate conditions","authors":"Benjamin Wagner, Andreas Mittelbach, P. Geiss","doi":"10.1002/maco.202112930","DOIUrl":"https://doi.org/10.1002/maco.202112930","url":null,"abstract":"E‐coated galvanized steel sheets are widespread parts of the automotive industry. Hence, the undermining of the organic coating due to defects is a crucial issue. The delamination of an e‐coating is simulated for different cyclic climate conditions using the finite element method to predict the corrosion behavior over several weeks. A semiempirical mixed potential theory model is developed incorporating the time‐of‐wetness, the temperature, and the effect of corrosion products. Furthermore, the spatial orientation of the sheets is considered in the simulation. The trends of experimental delamination widths of corrosion tests are well described by the simulation.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"16 1","pages":"703 - 709"},"PeriodicalIF":0.0,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87839227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qing Liao, Bingsheng Li, F. Ge, Renda Wang, Hongpeng Zhang, V. Kršjak, Yanbin Sheng
Ferritic/martensitic steel was chosen as a primary candidate structural material for China Initiative Accelerator Driven System (CiADS) which started in 2015. A new kind of tempered martensitic steel, Steel of Institute of Modern Physics (SIMP), was designed to meet the requirements of the special operating environment. Structural materials suffer from liquid Pb‐Bi corrosion and liquid metal wetting at 450°C. Liquid metal wetting can seriously affect the mechanical properties of structural materials due to the decrease in surface energy and transition from martensitic laths to ferritic grains. Creep‐to‐rupture of SIMP steel was explored in stagnant liquid Pb‐Bi eutectic at 450°C. The possible reasons for creep‐to‐rupture are discussed. The results of the present study provide a new insight into challenges related to the application of SIMP steel in CiADS.
{"title":"Investigation into creep‐to‐rupture of SIMP steel in stagnant LBE at 300–450°C","authors":"Qing Liao, Bingsheng Li, F. Ge, Renda Wang, Hongpeng Zhang, V. Kršjak, Yanbin Sheng","doi":"10.1002/maco.202112887","DOIUrl":"https://doi.org/10.1002/maco.202112887","url":null,"abstract":"Ferritic/martensitic steel was chosen as a primary candidate structural material for China Initiative Accelerator Driven System (CiADS) which started in 2015. A new kind of tempered martensitic steel, Steel of Institute of Modern Physics (SIMP), was designed to meet the requirements of the special operating environment. Structural materials suffer from liquid Pb‐Bi corrosion and liquid metal wetting at 450°C. Liquid metal wetting can seriously affect the mechanical properties of structural materials due to the decrease in surface energy and transition from martensitic laths to ferritic grains. Creep‐to‐rupture of SIMP steel was explored in stagnant liquid Pb‐Bi eutectic at 450°C. The possible reasons for creep‐to‐rupture are discussed. The results of the present study provide a new insight into challenges related to the application of SIMP steel in CiADS.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"52 1","pages":"784 - 797"},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78210966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Beibei Zhang, G. Wang, Shenghua Ma, Hui Wang, J. Bai
Biomass, as a green and renewable energy source, can be procured from a broad range of sources and is low in cost. The full exploitation of biomass could reduce the dependence on and consumption of fossil fuels, and is conducive to the protection of the environment. The prevention of corrosion of metals is an issue considered problematic in many fields, including in industrial production among others. Many anticorrosion materials are expensive and are noxious to the environment. This is an important issue that anticorrosion workers cannot ignore. This study proposes the use of biochar epoxy to boost the barrier properties of the coating, which is both economical and eco‐friendly. The incorporation of biochar can reduce the porosity of the coating and complicate the path of the corrosive media towards the steel substrate. Additionally, it can also reinforce the anticorrosion performance of the coatings. First, this article introduces the effect of biochars with different ultrasonic durations on the anticorrosion performance of anticorrosion coatings. After finding the biochar with the optimal ultrasonic duration, the effects of biochar on the anticorrosion performance of the coatings at different temperatures are assessed and the changes in its anticorrosion performance following soaking are discussed. The discussion concludes that applying biochar to anticorrosion coatings provides a feasible type of coating for anticorrosion work.
{"title":"Enhancement of barrier and corrosion protection performance of epoxy coatings through adding eco‐friendly lamellar biochar","authors":"Beibei Zhang, G. Wang, Shenghua Ma, Hui Wang, J. Bai","doi":"10.1002/maco.202112697","DOIUrl":"https://doi.org/10.1002/maco.202112697","url":null,"abstract":"Biomass, as a green and renewable energy source, can be procured from a broad range of sources and is low in cost. The full exploitation of biomass could reduce the dependence on and consumption of fossil fuels, and is conducive to the protection of the environment. The prevention of corrosion of metals is an issue considered problematic in many fields, including in industrial production among others. Many anticorrosion materials are expensive and are noxious to the environment. This is an important issue that anticorrosion workers cannot ignore. This study proposes the use of biochar epoxy to boost the barrier properties of the coating, which is both economical and eco‐friendly. The incorporation of biochar can reduce the porosity of the coating and complicate the path of the corrosive media towards the steel substrate. Additionally, it can also reinforce the anticorrosion performance of the coatings. First, this article introduces the effect of biochars with different ultrasonic durations on the anticorrosion performance of anticorrosion coatings. After finding the biochar with the optimal ultrasonic duration, the effects of biochar on the anticorrosion performance of the coatings at different temperatures are assessed and the changes in its anticorrosion performance following soaking are discussed. The discussion concludes that applying biochar to anticorrosion coatings provides a feasible type of coating for anticorrosion work.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"46 1","pages":"720 - 732"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86766034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuzheng Qian, Waner Zhao, W. Zhan, Tianyue Zhang, Jingjing Pan, Yiting Liu
A novel type of Co–Ti–Mo conversion coating (CoTiMoCC) was prepared on LY12 aluminum alloy, furthermore the optimal formula and the effect of conversion time (CTI) were studied in detail. The micromorphology and phase compositions were systematically investigated by scanning electron microscopy and X‐ray photoelectron spectroscopy, and the corrosion resistance was determined by dropping test, electrochemical tests, and immersion test. Results reveal that the best formula of CoTiMoCC is Co2SO4: 2.0 g/L, H2TiF6: 1.5 ml/L, and Na2MoO4: 1.0 g/L and the corresponding optimal CTI is 16 min. Significantly, the micromorphology of CoTiMoCC under the best conversion condition is relatively smooth, continuous, and dense, and the major elements on the surface are Co, Ti, Mo, Al, O, and F. The phase compositions mainly consist of CoO, Co3O4, MoO3, Mo2O5, TiO2, and Al2O3, as well as a small quantity of AlF3·3H2O and Na3AlF6. Compared with the Al alloy matrix, CoTiMoCC acquires an order of magnitude lower Icorr and thus significantly reduces its corrosion rate, which is also confirmed by electrochemical impedance spectroscopy results. Further study of immersion test exhibits that the corrosion resistance of CoTiMoCC is approximately five times that of Al alloy matrix, and no obvious corrosion spots are generated on its surface.
{"title":"Formation and corrosion resistance of a novel Co–Ti–Mo composite chromium‐free chemical conversion coating on LY12 aluminum alloy","authors":"Xuzheng Qian, Waner Zhao, W. Zhan, Tianyue Zhang, Jingjing Pan, Yiting Liu","doi":"10.1002/maco.202112951","DOIUrl":"https://doi.org/10.1002/maco.202112951","url":null,"abstract":"A novel type of Co–Ti–Mo conversion coating (CoTiMoCC) was prepared on LY12 aluminum alloy, furthermore the optimal formula and the effect of conversion time (CTI) were studied in detail. The micromorphology and phase compositions were systematically investigated by scanning electron microscopy and X‐ray photoelectron spectroscopy, and the corrosion resistance was determined by dropping test, electrochemical tests, and immersion test. Results reveal that the best formula of CoTiMoCC is Co2SO4: 2.0 g/L, H2TiF6: 1.5 ml/L, and Na2MoO4: 1.0 g/L and the corresponding optimal CTI is 16 min. Significantly, the micromorphology of CoTiMoCC under the best conversion condition is relatively smooth, continuous, and dense, and the major elements on the surface are Co, Ti, Mo, Al, O, and F. The phase compositions mainly consist of CoO, Co3O4, MoO3, Mo2O5, TiO2, and Al2O3, as well as a small quantity of AlF3·3H2O and Na3AlF6. Compared with the Al alloy matrix, CoTiMoCC acquires an order of magnitude lower Icorr and thus significantly reduces its corrosion rate, which is also confirmed by electrochemical impedance spectroscopy results. Further study of immersion test exhibits that the corrosion resistance of CoTiMoCC is approximately five times that of Al alloy matrix, and no obvious corrosion spots are generated on its surface.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"25 1","pages":"710 - 719"},"PeriodicalIF":0.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76125394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wei Wu, Niyun Liu, Peilin Chai, Li-li Zhu, Shiyu Huang, Ying Yang, Bo Zhao, Zhiyong Liu
The corrosion behaviors of Sb‐free and Sb‐added low‐alloy structural steels were comparatively studied in a real tropical marine atmosphere. And the role of Sb addition on corrosion resistance was clarified by electrochemical measurement and rust analysis. The results showed that the addition of 0.05% Sb increased the polarization resistance, reduced the cathodic current density, and slowed down the oxygen reduction process. Meanwhile, Sb addition optimized the physical structure, promoted the transformation of phase, and improved the protection of the rust. More importantly, 0.05% Sb addition inhibited the local acidification at the bottom of the pits, thus slowing down the local corrosion process at the rust/matrix interface. Accordingly, the corrosion resistance of the Sb‐added low‐alloy steel was enhanced, causing a lower corrosion rate than that of Sb‐free steel in a tropical marine atmosphere.
{"title":"Roles of Sb addition on the corrosion resistance of the low‐alloy steel in a real tropical marine atmosphere","authors":"Wei Wu, Niyun Liu, Peilin Chai, Li-li Zhu, Shiyu Huang, Ying Yang, Bo Zhao, Zhiyong Liu","doi":"10.1002/maco.202112818","DOIUrl":"https://doi.org/10.1002/maco.202112818","url":null,"abstract":"The corrosion behaviors of Sb‐free and Sb‐added low‐alloy structural steels were comparatively studied in a real tropical marine atmosphere. And the role of Sb addition on corrosion resistance was clarified by electrochemical measurement and rust analysis. The results showed that the addition of 0.05% Sb increased the polarization resistance, reduced the cathodic current density, and slowed down the oxygen reduction process. Meanwhile, Sb addition optimized the physical structure, promoted the transformation of phase, and improved the protection of the rust. More importantly, 0.05% Sb addition inhibited the local acidification at the bottom of the pits, thus slowing down the local corrosion process at the rust/matrix interface. Accordingly, the corrosion resistance of the Sb‐added low‐alloy steel was enhanced, causing a lower corrosion rate than that of Sb‐free steel in a tropical marine atmosphere.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"161 1","pages":"733 - 746"},"PeriodicalIF":0.0,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77730069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MCrAlY coatings made by electron beam physical vapor deposition or thermal spray are often used to provide protection for superalloys against high‐temperature oxidation and corrosion. In addition to Y, other elements such as Ta, Hf, and Si have been reported to be beneficial. In this paper, NiCoCrAlX (where X = Y, Ta, Hf, and/or Si) coatings were fabricated via an electrolytic codeposition process in a sulfate‐based Ni–Co plating solution. As compared to uncoated René 80 substrates, the electro‐codeposited NiCoCrAlX coatings demonstrated superior performance during oxidation testing with a 1‐h cycle frequency at 1000°C and 1100°C. Further improved oxidation resistance was observed for the coatings with Hf and Si additions, but not with the addition of Ta. The levels of S, Y, and O in the electrodeposited NiCoCrAlY coating were measured by high‐resolution glow discharge mass spectrometry and were compared to those in thermal spray coatings.
由电子束物理气相沉积或热喷涂制成的MCrAlY涂层通常用于保护高温合金免受高温氧化和腐蚀。除Y外，其他元素如Ta、Hf和Si也被认为是有益的。在本文中，NiCoCrAlX(其中X = Y, Ta, Hf和/或Si)涂层在硫酸盐基Ni-Co镀液中通过电解共沉积工艺制备。与未涂覆的ren 80基材相比，电共沉积NiCoCrAlX涂层在1000°C和1100°C下的1 h循环频率氧化测试中表现出优越的性能。添加Hf和Si后涂层的抗氧化性能得到进一步提高，而添加Ta后涂层的抗氧化性能没有提高。采用高分辨率辉光放电质谱法测定了电沉积NiCoCrAlY涂层中S、Y和O的含量，并与热喷涂涂层进行了比较。
{"title":"Cyclic oxidation behavior of MCrAlX coatings made by electrolytic codeposition","authors":"Ying Zhang, Jason Witman, S. Dryepondt","doi":"10.1002/maco.202112843","DOIUrl":"https://doi.org/10.1002/maco.202112843","url":null,"abstract":"MCrAlY coatings made by electron beam physical vapor deposition or thermal spray are often used to provide protection for superalloys against high‐temperature oxidation and corrosion. In addition to Y, other elements such as Ta, Hf, and Si have been reported to be beneficial. In this paper, NiCoCrAlX (where X = Y, Ta, Hf, and/or Si) coatings were fabricated via an electrolytic codeposition process in a sulfate‐based Ni–Co plating solution. As compared to uncoated René 80 substrates, the electro‐codeposited NiCoCrAlX coatings demonstrated superior performance during oxidation testing with a 1‐h cycle frequency at 1000°C and 1100°C. Further improved oxidation resistance was observed for the coatings with Hf and Si additions, but not with the addition of Ta. The levels of S, Y, and O in the electrodeposited NiCoCrAlY coating were measured by high‐resolution glow discharge mass spectrometry and were compared to those in thermal spray coatings.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"20 1","pages":"747 - 757"},"PeriodicalIF":0.0,"publicationDate":"2022-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85543042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Present efforts to support the essential industrial‐scale electrolytic production of copper‐based metal powders urgently require approaches to the real‐time predicting of corrosion of copper cathodes employed in electrolytic production processes. However, current approaches are extremely limited owing to the difficulty of accurately modeling the complex cathode corrosion process. In this study, the corrosion process under different parameters was analyzed by a self‐designed continuous electrolytic corrosion experimental device, clarify the influence mechanism of current density on the corrosion of the solid–liquid–gas interface area, and addresses this issue by applying a random forest machine learning approach based on three process parameters, including the electrolyte temperature, liquid‐level fluctuation cycle period, and current density. The dataset employed in the model is obtained using a novel experimental corrosion test method based on electrode arrays. The experimental results include the corrosion rates of copper cathode plates at different positions relative to the liquid electrolyte level during the electrolysis process. The resulting stochastic model is demonstrated to obtain a high prediction accuracy of 97% for the various regions of copper cathode plates defined according to liquid electrolyte level.
{"title":"Machine learning‐based analysis and prediction of the interfacial corrosion processes of copper cathode plates during the electrolytic production of copper powders","authors":"Youzhi Zhou, Pengcheng Lin, Xin Ke, Qiang Hu, Qi Shi, Jingguo Zhang, Zhong Wang, Limin Wang","doi":"10.1002/maco.202112977","DOIUrl":"https://doi.org/10.1002/maco.202112977","url":null,"abstract":"Present efforts to support the essential industrial‐scale electrolytic production of copper‐based metal powders urgently require approaches to the real‐time predicting of corrosion of copper cathodes employed in electrolytic production processes. However, current approaches are extremely limited owing to the difficulty of accurately modeling the complex cathode corrosion process. In this study, the corrosion process under different parameters was analyzed by a self‐designed continuous electrolytic corrosion experimental device, clarify the influence mechanism of current density on the corrosion of the solid–liquid–gas interface area, and addresses this issue by applying a random forest machine learning approach based on three process parameters, including the electrolyte temperature, liquid‐level fluctuation cycle period, and current density. The dataset employed in the model is obtained using a novel experimental corrosion test method based on electrode arrays. The experimental results include the corrosion rates of copper cathode plates at different positions relative to the liquid electrolyte level during the electrolysis process. The resulting stochastic model is demonstrated to obtain a high prediction accuracy of 97% for the various regions of copper cathode plates defined according to liquid electrolyte level.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"77 1","pages":"811 - 825"},"PeriodicalIF":0.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79345430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this study is to develop polymeric thin films for corrosion protection of magnesium alloy AZ31. As polymer matrix, poly(4‐vinyl pyridine) (P4VP) is selected due to its semiconducting properties and protonic conductivity. Polyacrylic acid is tested as crosslinking layers to improve interfacial adhesion. The macroscopic corrosion properties of the multilayer coatings are investigated by means of electrochemical methods, such as linear sweep voltammetry and electrochemical impedance spectroscopy (EIS), in corrosive media simulating technical and biomedical applications. It is demonstrated that thin multilayer coatings can suppress the corrosion rates of magnesium alloys. To our best knowledge, this is the first demonstration of the use of P4VP as a conducting polymer film with protonic conductivity for corrosion protection of magnesium alloys.
{"title":"Corrosion protection properties of poly(4‐vinyl pyridine) containing multilayer polymeric coatings on magnesium alloy AZ31","authors":"Chayanika Das, Eleni Kastania, J. Witt, O. Ozcan","doi":"10.1002/maco.202112708","DOIUrl":"https://doi.org/10.1002/maco.202112708","url":null,"abstract":"The aim of this study is to develop polymeric thin films for corrosion protection of magnesium alloy AZ31. As polymer matrix, poly(4‐vinyl pyridine) (P4VP) is selected due to its semiconducting properties and protonic conductivity. Polyacrylic acid is tested as crosslinking layers to improve interfacial adhesion. The macroscopic corrosion properties of the multilayer coatings are investigated by means of electrochemical methods, such as linear sweep voltammetry and electrochemical impedance spectroscopy (EIS), in corrosive media simulating technical and biomedical applications. It is demonstrated that thin multilayer coatings can suppress the corrosion rates of magnesium alloys. To our best knowledge, this is the first demonstration of the use of P4VP as a conducting polymer film with protonic conductivity for corrosion protection of magnesium alloys.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"7 1","pages":"427 - 435"},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77708130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：