Pub Date : 2024-11-28DOI: 10.1016/j.corsci.2024.112597
Decang Zhang , Xiaoxin Zhang , Qing Zou , Jun Zhang , Hao Ren , Xian Zeng , Qingzhi Yan
Despite extensive research on dissolution corrosion, whether element dissolution is selective or non-selective remains unclear, due to limitations of past characterization technologies. Using nano-scale characterization, we investigated AFA steel exposed to LBE with 10−8 wt.% oxygen at 600°C for 1700 h, found that alloying elements dissolve non-selectively into LBE and then reprecipitate, forming penetrable corrosion zone that inherits substrate crystallographic information and comprises ferrite, river-like NiAl, and NiAl nanoparticles. The ferrite and river-like NiAl exhibit complete elemental segregation due to liquid-phase diffusion, while NiAl nanoparticles form via reaction-diffusion. This supports that coupled dissolution-reprecipitation mechanism primarily controls dissolution corrosion at 600°C.
{"title":"Nano-scale evidence for coupled interfacial dissolution-reprecipitation (CDR) controlling corrosion of alumina-forming austenitic (AFA) steel in static lead-bismuth eutectic (LBE) at 600°C","authors":"Decang Zhang , Xiaoxin Zhang , Qing Zou , Jun Zhang , Hao Ren , Xian Zeng , Qingzhi Yan","doi":"10.1016/j.corsci.2024.112597","DOIUrl":"10.1016/j.corsci.2024.112597","url":null,"abstract":"<div><div>Despite extensive research on dissolution corrosion, whether element dissolution is selective or non-selective remains unclear, due to limitations of past characterization technologies. Using nano-scale characterization, we investigated AFA steel exposed to LBE with 10<sup>−8</sup> wt.% oxygen at 600°C for 1700 h, found that alloying elements dissolve non-selectively into LBE and then reprecipitate, forming penetrable corrosion zone that inherits substrate crystallographic information and comprises ferrite, river-like NiAl, and NiAl nanoparticles. The ferrite and river-like NiAl exhibit complete elemental segregation due to liquid-phase diffusion, while NiAl nanoparticles form via reaction-diffusion. This supports that coupled dissolution-reprecipitation mechanism primarily controls dissolution corrosion at 600°C.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112597"},"PeriodicalIF":7.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-26DOI: 10.1016/j.corsci.2024.112600
Zhichao Jiao , Yifei Dong , Qikang Li , Qing Zhou , Shuai Han , Cunhong Yin , Zhiyuan Huang , Xianzong Wang , Haifeng Wang , Weimin Liu
The demand for tribocorrosion-resistant equipment has driven extensive research into advanced materials. Utilizing electrochemical measurements and density-functional theory (DFT) calculations, this study systematically elucidates nitrogen alloying's role in enhancing tribocorrosion resistance of VCoNi MPEAs in artificial seawater. The results demonstrate that increasing N enhances VCoNiN's tribocorrosion performance due to stronger nitrogen-metal bonding, which leads to a decrease in the electronic work function, and competitive adsorption between O and Cl. Specifically, N-alloying strengthens O bonding while reducing the detrimental effects of Cl adsorption. This work provides novel insights into optimizing the tribocorrosion resistance of MPEAs by clarifying the critical role of N in modifying the electronic structure.
{"title":"Enhancing tribocorrosion resistance of VCoNi alloys in artificial seawater via nitrogen alloying","authors":"Zhichao Jiao , Yifei Dong , Qikang Li , Qing Zhou , Shuai Han , Cunhong Yin , Zhiyuan Huang , Xianzong Wang , Haifeng Wang , Weimin Liu","doi":"10.1016/j.corsci.2024.112600","DOIUrl":"10.1016/j.corsci.2024.112600","url":null,"abstract":"<div><div>The demand for tribocorrosion-resistant equipment has driven extensive research into advanced materials. Utilizing electrochemical measurements and density-functional theory (DFT) calculations, this study systematically elucidates nitrogen alloying's role in enhancing tribocorrosion resistance of VCoNi MPEAs in artificial seawater. The results demonstrate that increasing N enhances VCoNiN's tribocorrosion performance due to stronger nitrogen-metal bonding, which leads to a decrease in the electronic work function, and competitive adsorption between O and Cl. Specifically, N-alloying strengthens O bonding while reducing the detrimental effects of Cl adsorption. This work provides novel insights into optimizing the tribocorrosion resistance of MPEAs by clarifying the critical role of N in modifying the electronic structure.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112600"},"PeriodicalIF":7.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-26DOI: 10.1016/j.corsci.2024.112599
Guang Yang , Zeyu Guo , Zheng Li , Lunsu Liang , Yajing Zhang , Hao Guo , Can Wang , Kai Xu , Lingxiao Li
The long-term exposure of X80 pipeline steel to hydrogen presents significant challenges. In this study, we establish a quantitative relationship between hydrogen content and the low-cycle fatigue (LCF) lifetime of X80 pipeline steel by integrating fatigue experiments, microstructure characterization, molecular dynamics simulations, and a damage plastic strain energy model. Additionally, we investigate the microscale mechanisms governing microstructure and energy evolution in pipeline steel under LCF loading. These findings contribute to a deeper understanding of the failure mechanisms and provide valuable insights for assessing the safety of hydrogen service in pipelines.
{"title":"Effect of hydrogen on low-cycle fatigue properties and the mechanism of hysteresis energy method lifetime prediction of X80 pipeline steel","authors":"Guang Yang , Zeyu Guo , Zheng Li , Lunsu Liang , Yajing Zhang , Hao Guo , Can Wang , Kai Xu , Lingxiao Li","doi":"10.1016/j.corsci.2024.112599","DOIUrl":"10.1016/j.corsci.2024.112599","url":null,"abstract":"<div><div>The long-term exposure of X80 pipeline steel to hydrogen presents significant challenges. In this study, we establish a quantitative relationship between hydrogen content and the low-cycle fatigue (LCF) lifetime of X80 pipeline steel by integrating fatigue experiments, microstructure characterization, molecular dynamics simulations, and a damage plastic strain energy model. Additionally, we investigate the microscale mechanisms governing microstructure and energy evolution in pipeline steel under LCF loading. These findings contribute to a deeper understanding of the failure mechanisms and provide valuable insights for assessing the safety of hydrogen service in pipelines.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112599"},"PeriodicalIF":7.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-26DOI: 10.1016/j.corsci.2024.112593
Jiahang Li , Enze Zhou , Fei Xie , Zhong Li , Fuhui Wang , Dake Xu
The microbially mediated metal stress corrosion cracking (SCC) mechanisms in deep-sea environments remain unclear, hindering the safe use of deep-sea equipment materials. Hydrostatic pressure facilitated microbiologically influenced corrosion resulting in the pitting depth increase. The stress concentration at the pit bottom induced anodic dissolution (AD), leading to ductile fracture. Hydrostatic pressure and iron sulfides both enhanced the hydrogen evolution reaction (HER). The sulfides produced by SRB metabolism inhibit hydrogen atom recombination, leading to a higher hydrogen permeation current and inducing hydrogen embrittlement (HE) fracture. The combined effect of AD and HE increases the SCC susceptibility of deep-sea pipeline steel.
{"title":"Accelerated stress corrosion cracking of X80 pipeline steel under the combined effects of sulfate-reducing bacteria and hydrostatic pressure","authors":"Jiahang Li , Enze Zhou , Fei Xie , Zhong Li , Fuhui Wang , Dake Xu","doi":"10.1016/j.corsci.2024.112593","DOIUrl":"10.1016/j.corsci.2024.112593","url":null,"abstract":"<div><div>The microbially mediated metal stress corrosion cracking (SCC) mechanisms in deep-sea environments remain unclear, hindering the safe use of deep-sea equipment materials. Hydrostatic pressure facilitated microbiologically influenced corrosion resulting in the pitting depth increase. The stress concentration at the pit bottom induced anodic dissolution (AD), leading to ductile fracture. Hydrostatic pressure and iron sulfides both enhanced the hydrogen evolution reaction (HER). The sulfides produced by SRB metabolism inhibit hydrogen atom recombination, leading to a higher hydrogen permeation current and inducing hydrogen embrittlement (HE) fracture. The combined effect of AD and HE increases the SCC susceptibility of deep-sea pipeline steel.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112593"},"PeriodicalIF":7.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-25DOI: 10.1016/j.corsci.2024.112596
Xiukai Chen , Bin Shi , Zhenhua Zhao , Fei Long , Hong Bian , Xiaoguo Song , Zhendong Wang , Danyang Lin , Jianhong Dai
We propose employing AuSn20 filler to improve the bonding strength and corrosion resistance of TA9/Sn-6Zr/ZrO2 joint. To assess its feasibility, the interfacial microstructure, mechanical properties, and corrosion resistance of two TA9/ZrO2 joints were investigated. The results indicate that the addition of AuSn20 filler transforms the brazing seam from brittle and lower work function β-Sn and ZrSn2 phases to ductile and higher work function AuSn2 and AuSn4 phase, significantly improving the shear strength and corrosion resistance of the TA9/ZrO2 joint. The corrosion products of TA9/ZrO2 joints are mainly SnO and SnO2, with traces of SnCl2, SnCl4, and Zr(HPO4)2.
{"title":"Improvement of biocompatible TA9/ZrO2 joint by AuSn20 filler: Interfacial microstructure, mechanical properties, and corrosion resistance","authors":"Xiukai Chen , Bin Shi , Zhenhua Zhao , Fei Long , Hong Bian , Xiaoguo Song , Zhendong Wang , Danyang Lin , Jianhong Dai","doi":"10.1016/j.corsci.2024.112596","DOIUrl":"10.1016/j.corsci.2024.112596","url":null,"abstract":"<div><div>We propose employing AuSn20 filler to improve the bonding strength and corrosion resistance of TA9/Sn-6Zr/ZrO<sub>2</sub> joint. To assess its feasibility, the interfacial microstructure, mechanical properties, and corrosion resistance of two TA9/ZrO<sub>2</sub> joints were investigated. The results indicate that the addition of AuSn20 filler transforms the brazing seam from brittle and lower work function β-Sn and ZrSn<sub>2</sub> phases to ductile and higher work function AuSn<sub>2</sub> and AuSn<sub>4</sub> phase, significantly improving the shear strength and corrosion resistance of the TA9/ZrO<sub>2</sub> joint. The corrosion products of TA9/ZrO<sub>2</sub> joints are mainly SnO and SnO<sub>2</sub>, with traces of SnCl<sub>2</sub>, SnCl<sub>4</sub>, and Zr(HPO<sub>4</sub>)<sub>2</sub>.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112596"},"PeriodicalIF":7.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-24DOI: 10.1016/j.corsci.2024.112595
Jae Yeong Jung , Hyun Jung , Yun Hee An , Soo Yeol Lee , Yakai Zhao , Kwang Boon Lau , Pei Wang , Dong-Hyun Lee
The role of solidification cell structure in hydrogen embrittlement (HE) in laser-powder bed fusion fabricated CoCrFeNi medium-entropy alloy is investigated by comparing as-built and annealed conditions. Annealing at 1100 °C dissolves the cell structure and induces partial recrystallization. This slightly reduced the strength but significantly improves HE resistance by suppressing hydrogen-assisted intergranular cracking. The results are discussed in terms of the changes in hydrogen trapping/diffusion behavior and deformation behavior upon removal of cell structure, as investigated through thermal desorption spectroscopy, Ag decoration, and digital image correlation technique.
通过比较坯料和退火条件，研究了凝固晶胞结构在激光粉末床熔融制造的 CoCrFeNi 中熵合金氢脆（HE）中的作用。1100 °C 退火会溶解晶胞结构并诱导部分再结晶。这略微降低了强度，但通过抑制氢助晶间裂纹，显著提高了抗高热性能。通过热解吸光谱、Ag 装饰和数字图像相关技术研究了消除晶胞结构后氢捕集/扩散行为和变形行为的变化，并对结果进行了讨论。
{"title":"Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments","authors":"Jae Yeong Jung , Hyun Jung , Yun Hee An , Soo Yeol Lee , Yakai Zhao , Kwang Boon Lau , Pei Wang , Dong-Hyun Lee","doi":"10.1016/j.corsci.2024.112595","DOIUrl":"10.1016/j.corsci.2024.112595","url":null,"abstract":"<div><div>The role of solidification cell structure in hydrogen embrittlement (HE) in laser-powder bed fusion fabricated CoCrFeNi medium-entropy alloy is investigated by comparing as-built and annealed conditions. Annealing at 1100 °C dissolves the cell structure and induces partial recrystallization. This slightly reduced the strength but significantly improves HE resistance by suppressing hydrogen-assisted intergranular cracking. The results are discussed in terms of the changes in hydrogen trapping/diffusion behavior and deformation behavior upon removal of cell structure, as investigated through thermal desorption spectroscopy, Ag decoration, and digital image correlation technique.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112595"},"PeriodicalIF":7.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-23DOI: 10.1016/j.corsci.2024.112594
Licheng Chen, Hefei Ji, Bin Su, Piheng Chen, Xiaolin Wang
The corrosion resistance of uranium to hydrogen has been significantly enhanced by niobium addition while its mechanism remains unknown. To better understanding the underlying effect of niobium addition, behaviours of hydrogen in α-U, dilute U-Nb alloy and concentrated U-Nb alloy have been systematically explored by ab-initio calculations and experimental observations. Our findings suggest that Nb atoms play distinct roles in the dilute and concentrated single-phase U-Nb alloys, shifting from hydrogen traps to rapid hydrogen diffusion channels. Moreover, the dominant mechanisms enhancing hydrogen corrosion resistance differ between dilute and concentrated U-Nb alloys.
{"title":"The role of Nb in enhancing the corrosion resistance of U-Nb alloy to hydrogen","authors":"Licheng Chen, Hefei Ji, Bin Su, Piheng Chen, Xiaolin Wang","doi":"10.1016/j.corsci.2024.112594","DOIUrl":"10.1016/j.corsci.2024.112594","url":null,"abstract":"<div><div>The corrosion resistance of uranium to hydrogen has been significantly enhanced by niobium addition while its mechanism remains unknown. To better understanding the underlying effect of niobium addition, behaviours of hydrogen in α-U, dilute U-Nb alloy and concentrated U-Nb alloy have been systematically explored by ab-initio calculations and experimental observations. Our findings suggest that Nb atoms play distinct roles in the dilute and concentrated single-phase U-Nb alloys, shifting from hydrogen traps to rapid hydrogen diffusion channels. Moreover, the dominant mechanisms enhancing hydrogen corrosion resistance differ between dilute and concentrated U-Nb alloys.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112594"},"PeriodicalIF":7.4,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-23DOI: 10.1016/j.corsci.2024.112583
Congzhi Cheng , Gongsai Huang , Wenhua Wu
This study investigates the corrosion behavior and morphology evolution of DH36 high-strength ship plate steel under various tensile stress levels in a neutral salt spray environment, utilizing multifractal analysis. Three groups of corrosion tests revealed that corrosion morphology evolves in three stages: initiation, pitting dominance, and uniform corrosion. The multifractal spectrum shape parameters effectively characterize the corrosion features and changes in rate and depth. Tensile stress, especially at 60 % yield strength, significantly accelerates corrosion. The study demonstrates that multifractal theory provides a comprehensive description of corrosion morphology, offering new insights into the stress-corrosion coupling in high-strength steel.
{"title":"Effect of tensile stress on the corrosion morphology and multifractal characteristics of DH36 steel in a neutral salt spray environment","authors":"Congzhi Cheng , Gongsai Huang , Wenhua Wu","doi":"10.1016/j.corsci.2024.112583","DOIUrl":"10.1016/j.corsci.2024.112583","url":null,"abstract":"<div><div>This study investigates the corrosion behavior and morphology evolution of DH36 high-strength ship plate steel under various tensile stress levels in a neutral salt spray environment, utilizing multifractal analysis. Three groups of corrosion tests revealed that corrosion morphology evolves in three stages: initiation, pitting dominance, and uniform corrosion. The multifractal spectrum shape parameters effectively characterize the corrosion features and changes in rate and depth. Tensile stress, especially at 60 % yield strength, significantly accelerates corrosion. The study demonstrates that multifractal theory provides a comprehensive description of corrosion morphology, offering new insights into the stress-corrosion coupling in high-strength steel.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112583"},"PeriodicalIF":7.4,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-22DOI: 10.1016/j.corsci.2024.112567
D.H. Li , H.X. Hu , H.D. Pan , Z.B. Wang , W.T. An , Y.G. Zheng
The corrosion of Ti75 alloy was investigated in a neutral 3.5 wt% NaCl solution with five concentrations of Cu2+. Results demonstrated that the corrosion is the least in the control solution without Cu2+. However, a further increase in the Cu2+ concentration led to a decrease in corrosion due to the changes in passive film properties including its compositions and the carrier density. Moreover, both the corrosion potential and the diffusion-limited current density increase with the increasing Cu2+ concentration. Additionally, the effects of Cu2+ on both anodic and cathodic processes, as well as its role in the passive film's development, were analyzed.
{"title":"Corrosion of Ti75 alloy in a 3.5 wt% NaCl solution containing different concentrations of Cu2+","authors":"D.H. Li , H.X. Hu , H.D. Pan , Z.B. Wang , W.T. An , Y.G. Zheng","doi":"10.1016/j.corsci.2024.112567","DOIUrl":"10.1016/j.corsci.2024.112567","url":null,"abstract":"<div><div>The corrosion of Ti75 alloy was investigated in a neutral 3.5 wt% NaCl solution with five concentrations of Cu<sup>2+</sup>. Results demonstrated that the corrosion is the least in the control solution without Cu<sup>2+</sup>. However, a further increase in the Cu<sup>2+</sup> concentration led to a decrease in corrosion due to the changes in passive film properties including its compositions and the carrier density. Moreover, both the corrosion potential and the diffusion-limited current density increase with the increasing Cu<sup>2+</sup> concentration. Additionally, the effects of Cu<sup>2+</sup> on both anodic and cathodic processes, as well as its role in the passive film's development, were analyzed.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112567"},"PeriodicalIF":7.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Micro-galvanic corrosion, driven by potential differences between strengthening phases and the matrix, is a major concern for Mg alloys in NaCl solution. Intriguingly, we find that the micro-galvanic corrosion, dominated by the nobler 18R-LPSO phase, is suppressed in Na2SO4 solution, where both the LPSO and Mg matrix are corroded simultaneously. Since the LPSO phase contains more Er/Zn atoms than matrix, higher proportion of Er3+/Zn2+ could be released in SO42--affected corrosion, eventually forming a more protective corrosion film containing Er2O3/ZnO/ZnS. These findings highlight the specific corrosion behavior of Mg alloys in Na2SO4 solution, offering valuable insights for corrosion mitigation strategies.
{"title":"Insights into corrosion behavior of Mg alloys containing long-period stacking ordered structure in chloride and sulfate media","authors":"Jinshu Xie , Zhi Zhang , Hao Dong , Jinghuai Zhang , Xu-Sheng Yang , Zijian Yu , Ruizhi Wu","doi":"10.1016/j.corsci.2024.112592","DOIUrl":"10.1016/j.corsci.2024.112592","url":null,"abstract":"<div><div>Micro-galvanic corrosion, driven by potential differences between strengthening phases and the matrix, is a major concern for Mg alloys in NaCl solution. Intriguingly, we find that the micro-galvanic corrosion, dominated by the nobler 18R-LPSO phase, is suppressed in Na<sub>2</sub>SO<sub>4</sub> solution, where both the LPSO and Mg matrix are corroded simultaneously. Since the LPSO phase contains more Er/Zn atoms than matrix, higher proportion of Er<sup>3+</sup>/Zn<sup>2+</sup> could be released in SO<sub>4</sub><sup>2-</sup>-affected corrosion, eventually forming a more protective corrosion film containing Er<sub>2</sub>O<sub>3</sub>/ZnO/ZnS. These findings highlight the specific corrosion behavior of Mg alloys in Na<sub>2</sub>SO<sub>4</sub> solution, offering valuable insights for corrosion mitigation strategies.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112592"},"PeriodicalIF":7.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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