Pub Date : 2025-03-11DOI: 10.1016/j.corsci.2025.112856
Mengyao Liu , Di Mei , Shijie Zhu , Carsten Blawert , Mikhail L. Zheludkevich , Shaokang Guan , Sviatlana V. Lamaka
Performance of Mg implants might deteriorate faster than expected when exposed to a combination of corrosion attack and mechanical stress. Yet, there is limited discussion on stress-promoting effects during corrosion processes of biodegradable Mg alloys. This review unravels the influence of several types of external stress (i.e. tensile, compressive, bending, cyclic and flow shear stress) on the corrosion performance and corrosion-induced mechanical behavior of Mg alloys. Specifically, the alloy processing, testing and coating properties under stress are discussed. It elucidates understanding of Mg corrosion behavior in complex environments coupled with stress, important for optimizing the performance of Mg implants.
{"title":"The external stress-assisted corrosion behavior of Mg alloys for biomedical applications","authors":"Mengyao Liu , Di Mei , Shijie Zhu , Carsten Blawert , Mikhail L. Zheludkevich , Shaokang Guan , Sviatlana V. Lamaka","doi":"10.1016/j.corsci.2025.112856","DOIUrl":"10.1016/j.corsci.2025.112856","url":null,"abstract":"<div><div>Performance of Mg implants might deteriorate faster than expected when exposed to a combination of corrosion attack and mechanical stress. Yet, there is limited discussion on stress-promoting effects during corrosion processes of biodegradable Mg alloys. This review unravels the influence of several types of external stress (i.e. tensile, compressive, bending, cyclic and flow shear stress) on the corrosion performance and corrosion-induced mechanical behavior of Mg alloys. Specifically, the alloy processing, testing and coating properties under stress are discussed. It elucidates understanding of Mg corrosion behavior in complex environments coupled with stress, important for optimizing the performance of Mg implants.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112856"},"PeriodicalIF":7.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611222","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 : 2025-03-10DOI: 10.1016/j.corsci.2025.112859
Baolong Jiang , Xiaohuan Du , Qunjia Peng , Binglu Zhang , Yongqing Chen , Zhijie Jiao , Yang He , Yue Pan , Weiting Yang , Yida Deng , Lijie Qiao
The austenitic stainless steels in nuclear reactors suffer serious corrosion issues due to the the coupling effect of irradiation damage and hydrogen. Voids have a strong capability to trap hydrogen, reducing the corrosion resistance. There is still no effective strategy to improve the resistance to irradiation and hydrogen-induced corrosion. Here, increasing the alloying elements (Cr, Mo), and decreasing (Fe, Ni, Mn) can enhance the irradiation damage resistance of austenitic stainless steel, which changed defect type from voids to stacking faults, and further reducing hydrogen capture ability, resulting in enhanced resistance of irradiation and hydrogen-induced corrosion of austenitic stainless steel.
{"title":"The impact of alloying elements on the irradiation and hydrogen-induced corrosion of the austenite in nuclear stainless steel","authors":"Baolong Jiang , Xiaohuan Du , Qunjia Peng , Binglu Zhang , Yongqing Chen , Zhijie Jiao , Yang He , Yue Pan , Weiting Yang , Yida Deng , Lijie Qiao","doi":"10.1016/j.corsci.2025.112859","DOIUrl":"10.1016/j.corsci.2025.112859","url":null,"abstract":"<div><div>The austenitic stainless steels in nuclear reactors suffer serious corrosion issues due to the the coupling effect of irradiation damage and hydrogen. Voids have a strong capability to trap hydrogen, reducing the corrosion resistance. There is still no effective strategy to improve the resistance to irradiation and hydrogen-induced corrosion. Here, increasing the alloying elements (Cr, Mo), and decreasing (Fe, Ni, Mn) can enhance the irradiation damage resistance of austenitic stainless steel, which changed defect type from voids to stacking faults, and further reducing hydrogen capture ability, resulting in enhanced resistance of irradiation and hydrogen-induced corrosion of austenitic stainless steel.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112859"},"PeriodicalIF":7.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620511","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 : 2025-03-10DOI: 10.1016/j.corsci.2025.112854
Tiange Wang, Xiaoqing Ma, Baolong Gong, Jiale Hou, Shuxian Ji, Xixun Shen, Yulin Min, Qunjie Xu, Huaijie Cao
A thin MXene/chitosan composite coating (∼11. 29 μm) is designed for protection on Al alloy bipolar plates in simulated PEMFC environments. As a result, the corrosion current density decreases to 7.046 × 10−6 A/cm2 and the wear rate reduces to 1.147 × 10−2 mm−3 N−1m−1. Interestingly, it remains stable corrosion resistance after immersion tests over 168 h. In-situ corrosion experiment and surface potential distribution obtained by scanning kelvin probe force microscopy (SKPFM) reveal that the high corrosion resistance is attributed to a strong barrier and relocation of surface potential on the coating. This work sheds insights into understanding the protective mechanisms of MXene coating.
{"title":"Relocation of surface potential induced stable corrosion resistance of thin MXene/chitosan composite coating on Al alloy bipolar plates in PEMFC environments","authors":"Tiange Wang, Xiaoqing Ma, Baolong Gong, Jiale Hou, Shuxian Ji, Xixun Shen, Yulin Min, Qunjie Xu, Huaijie Cao","doi":"10.1016/j.corsci.2025.112854","DOIUrl":"10.1016/j.corsci.2025.112854","url":null,"abstract":"<div><div>A thin MXene/chitosan composite coating (∼11. 29 μm) is designed for protection on Al alloy bipolar plates in simulated PEMFC environments. As a result, the corrosion current density decreases to 7.046 × 10<sup>−6</sup> A/cm<sup>2</sup> and the wear rate reduces to 1.147 × 10<sup>−2</sup> mm<sup>−3</sup> N<sup>−1</sup>m<sup>−1</sup>. Interestingly, it remains stable corrosion resistance after immersion tests over 168 h. In-situ corrosion experiment and surface potential distribution obtained by scanning kelvin probe force microscopy (SKPFM) reveal that the high corrosion resistance is attributed to a strong barrier and relocation of surface potential on the coating. This work sheds insights into understanding the protective mechanisms of MXene coating.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112854"},"PeriodicalIF":7.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594266","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 : 2025-03-10DOI: 10.1016/j.corsci.2025.112858
Zhenyu Yang , Liya Guo , Pengji Su , Hengchang Lu , Bianjiang Yang , Bo Lu , Hongshan Zhao , Laihui Jia , Qiang Yao , Xicheng Wei , Han Dong
The effect of rare earth elements La and Ce on the corrosion behaviour of steel rebar HRB400E with mill scale was investigated in detail using electrochemical measurements and numerous characterization techniques after salt spray testing with NaCl. The results indicated that addition of La and Ce could decrease the corrosion rates of HRB400RE by more than 50 %. At the initial stages of corrosion, corrosion products on HRB400ERE were observed only on the exterior of the mill scale, with a relatively high percentage of magnetite and hematite. On the contrary, corrosion products were present on both the exterior and interior of the mill scale on HRB400ERE. During the corrosion process, the protective index of the rust on HRB400ERE was consistently higher than that on HRB400E. The dense and protective mill scale and rust layers formed on HRB400ERE both contributed to the enhanced corrosion resistance of the RE-alloyed steel.
{"title":"Effect of La and Ce on the corrosion behaviour of steel rebar HRB400E with mill scale in chloride environments","authors":"Zhenyu Yang , Liya Guo , Pengji Su , Hengchang Lu , Bianjiang Yang , Bo Lu , Hongshan Zhao , Laihui Jia , Qiang Yao , Xicheng Wei , Han Dong","doi":"10.1016/j.corsci.2025.112858","DOIUrl":"10.1016/j.corsci.2025.112858","url":null,"abstract":"<div><div>The effect of rare earth elements La and Ce on the corrosion behaviour of steel rebar HRB400E with mill scale was investigated in detail using electrochemical measurements and numerous characterization techniques after salt spray testing with NaCl. The results indicated that addition of La and Ce could decrease the corrosion rates of HRB400RE by more than 50 %. At the initial stages of corrosion, corrosion products on HRB400ERE were observed only on the exterior of the mill scale, with a relatively high percentage of magnetite and hematite. On the contrary, corrosion products were present on both the exterior and interior of the mill scale on HRB400ERE. During the corrosion process, the protective index of the rust on HRB400ERE was consistently higher than that on HRB400E. The dense and protective mill scale and rust layers formed on HRB400ERE both contributed to the enhanced corrosion resistance of the RE-alloyed steel.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112858"},"PeriodicalIF":7.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600606","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 : 2025-03-10DOI: 10.1016/j.corsci.2025.112855
Huaqing Yi, Weizong Bao, Xuan Zhang, Binbin He, Wenjun Lu
The complex relationship between temperature, tantalum (Ta) content, and oxidation behavior in Cantor alloys reveals a novel internal oxidation mechanism. Oxidation proceeds via a distinct two-stage process, where temperature and Ta content play critical roles in determining the evolution of oxide layers. The in-situ oxidation of the Laves phase triggers elemental redistribution, resulting in the formation of CrTaO4 particles along grain boundaries and a continuous CrTaO4 layer at the oxide/matrix interface, dramatically improving oxidation resistance. Unlike conventional alloys, where Laves phase precipitation restricts oxygen and metal ion diffusion, this mechanism drives advanced protective oxide development, advancing alloy engineering.
{"title":"Unveiling the internal oxidation mechanism in Cantor alloys: Role of Laves phase and Ta variations","authors":"Huaqing Yi, Weizong Bao, Xuan Zhang, Binbin He, Wenjun Lu","doi":"10.1016/j.corsci.2025.112855","DOIUrl":"10.1016/j.corsci.2025.112855","url":null,"abstract":"<div><div>The complex relationship between temperature, tantalum (Ta) content, and oxidation behavior in Cantor alloys reveals a novel internal oxidation mechanism. Oxidation proceeds via a distinct two-stage process, where temperature and Ta content play critical roles in determining the evolution of oxide layers. The in-situ oxidation of the Laves phase triggers elemental redistribution, resulting in the formation of CrTaO<sub>4</sub> particles along grain boundaries and a continuous CrTaO<sub>4</sub> layer at the oxide/matrix interface, dramatically improving oxidation resistance. Unlike conventional alloys, where Laves phase precipitation restricts oxygen and metal ion diffusion, this mechanism drives advanced protective oxide development, advancing alloy engineering.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112855"},"PeriodicalIF":7.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600540","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 : 2025-03-09DOI: 10.1016/j.corsci.2025.112857
Yao Zhou, Weiguo Li, Zhongqian Cao, Shenggang Li, Jinxu Li
This study investigates the impact of chemical heterogeneity on the hydrogen embrittlement susceptibility of medium Mn steel through slow strain rate tensile tests. By elucidating the relationship between microstructural evolution and hydrogen distribution, it is revealed that the heterogeneous Mn distribution in austenite causes Mn-depleted cores to transform into martensite first, with released hydrogen effectively enclosed by Mn-rich austenite shells. This mechanism shifts the primary site of hydrogen-induced cracking from phase interfaces to within austenite, significantly enhancing the hydrogen embrittlement resistance of medium Mn steel.
{"title":"Enhancing hydrogen embrittlement resistance through chemical heterogeneity in austenite of medium Mn steel","authors":"Yao Zhou, Weiguo Li, Zhongqian Cao, Shenggang Li, Jinxu Li","doi":"10.1016/j.corsci.2025.112857","DOIUrl":"10.1016/j.corsci.2025.112857","url":null,"abstract":"<div><div>This study investigates the impact of chemical heterogeneity on the hydrogen embrittlement susceptibility of medium Mn steel through slow strain rate tensile tests. By elucidating the relationship between microstructural evolution and hydrogen distribution, it is revealed that the heterogeneous Mn distribution in austenite causes Mn-depleted cores to transform into martensite first, with released hydrogen effectively enclosed by Mn-rich austenite shells. This mechanism shifts the primary site of hydrogen-induced cracking from phase interfaces to within austenite, significantly enhancing the hydrogen embrittlement resistance of medium Mn steel.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112857"},"PeriodicalIF":7.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594268","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 : 2025-03-08DOI: 10.1016/j.corsci.2025.112845
Lei Guo , Kaifa Du , Mengyi Tang , Minghao Liu , Zhouyu Fang , Wenmiao Li , Di Chen , Huayi Yin , Dihua Wang
The corrosion behavior and durability of platinum-coated titanium (Pt/Ti) anodes in molten carbonate electrolysis were systematically studied across a temperature range of 450–650°C. The main cause of anode degradation was identified as rapid oxygen diffusion from the platinum coating to the titanium substrate, resulting in excessive passivation and the formation of a rutile TiO2 layer. This passivation process led to coating breakage and spallation. To mitigate these issues, a TiNx interlayer was introduced as an oxygen diffusion barrier to form a Pt/TiNx/Ti electrode. The TiNx layer significantly reduced substrate oxidation, thereby improving the anode’s corrosion resistance and extending its service life under harsh electrolysis conditions. These findings provide crucial insights into the corrosion mechanism of Pt/Ti anodes and offer a promising strategy to enhance their performance and longevity in industrial molten carbonate electrolysis applications for CO2 reduction and green metallurgy.
{"title":"TiN diffusion barrier interlayer for enhancing the durability of Pt/Ti anodes for molten carbonate electrolysis","authors":"Lei Guo , Kaifa Du , Mengyi Tang , Minghao Liu , Zhouyu Fang , Wenmiao Li , Di Chen , Huayi Yin , Dihua Wang","doi":"10.1016/j.corsci.2025.112845","DOIUrl":"10.1016/j.corsci.2025.112845","url":null,"abstract":"<div><div>The corrosion behavior and durability of platinum-coated titanium (Pt/Ti) anodes in molten carbonate electrolysis were systematically studied across a temperature range of 450–650°C. The main cause of anode degradation was identified as rapid oxygen diffusion from the platinum coating to the titanium substrate, resulting in excessive passivation and the formation of a rutile TiO<sub>2</sub> layer. This passivation process led to coating breakage and spallation. To mitigate these issues, a TiN<sub>x</sub> interlayer was introduced as an oxygen diffusion barrier to form a Pt/TiN<sub>x</sub>/Ti electrode. The TiN<sub>x</sub> layer significantly reduced substrate oxidation, thereby improving the anode’s corrosion resistance and extending its service life under harsh electrolysis conditions. These findings provide crucial insights into the corrosion mechanism of Pt/Ti anodes and offer a promising strategy to enhance their performance and longevity in industrial molten carbonate electrolysis applications for CO<sub>2</sub> reduction and green metallurgy.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112845"},"PeriodicalIF":7.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594269","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 : 2025-03-07DOI: 10.1016/j.corsci.2025.112850
Yalin Li , Yong Wang , Nan Lin , Shijun Zhao , Zhenggang Wu
In this work, we aim to mechanistically understand the effects of nitrogen incorporation on the intricate oxidation mechanisms of (HfNbTaZr)(CN) high-entropy carbonitride (HECN). Theoretical calculations reveal that introducing nitrogen enhances the inherent oxygen affinity of Nb and Ta within (HfNbTaZr)(CN). Furthermore, (HfNbTaZr)(CN) demonstrates accelerated oxidation dynamics compared to (HfNbTaZr)C, as evidenced by ab initio molecular dynamics (AIMD) simulations. Building upon the elucidated oxidation mechanism, we propose an experimentally validated nitrogen regulation strategy to bolster the oxidation tolerance, which involves reducing or eliminating nitrogen in HECNs containing Nb and Ta whereas increasing nitrogen for NbTa-free multicomponent transition metal carbides (MTMCs).
{"title":"Disentangling the oxidation mechanisms of high-entropy carbonitrides","authors":"Yalin Li , Yong Wang , Nan Lin , Shijun Zhao , Zhenggang Wu","doi":"10.1016/j.corsci.2025.112850","DOIUrl":"10.1016/j.corsci.2025.112850","url":null,"abstract":"<div><div>In this work, we aim to mechanistically understand the effects of nitrogen incorporation on the intricate oxidation mechanisms of (HfNbTaZr)(CN) high-entropy carbonitride (HECN). Theoretical calculations reveal that introducing nitrogen enhances the inherent oxygen affinity of Nb and Ta within (HfNbTaZr)(CN). Furthermore, (HfNbTaZr)(CN) demonstrates accelerated oxidation dynamics compared to (HfNbTaZr)C, as evidenced by <em>ab initio</em> molecular dynamics (AIMD) simulations. Building upon the elucidated oxidation mechanism, we propose an experimentally validated nitrogen regulation strategy to bolster the oxidation tolerance, which involves reducing or eliminating nitrogen in HECNs containing Nb and Ta whereas increasing nitrogen for NbTa-free multicomponent transition metal carbides (MTMCs).</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112850"},"PeriodicalIF":7.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577184","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 : 2025-03-07DOI: 10.1016/j.corsci.2025.112847
Chongchong Tang, Björn Schäfer, Carsten Schroer, Bronislava Gorr
The oxidation behavior and microstructural evolution of M–20Cr–20Ta (M: Ni, Fe, Co) alloys are investigated at 1000°C and 1200°C in Ar–20 vol% O2. High-temperature oxidation results in growth of bi-layered oxide scales, featuring an outer Cr₂O₃ layer and an inner Cr–Ta oxide layer. The Cr–Ta oxide layer consists of two distinct phases: CrTaO₄ and CrTa₂O₆. Significant improvements in oxidation resistance are found for Co and Fe alloys, in consequence of formation of the Cr–Ta oxides. At 1200°C, oxidation kinetics approach a cubic growth law after an initial transient stage, underscoring the exceptional protective capabilities of the Cr–Ta oxides.
{"title":"Improved oxidation behavior of M–20Cr–20Ta (M: Ni, Fe, Co) ternary alloys by formation of complex Cr–Ta-based oxides","authors":"Chongchong Tang, Björn Schäfer, Carsten Schroer, Bronislava Gorr","doi":"10.1016/j.corsci.2025.112847","DOIUrl":"10.1016/j.corsci.2025.112847","url":null,"abstract":"<div><div>The oxidation behavior and microstructural evolution of M–20Cr–20Ta (M: Ni, Fe, Co) alloys are investigated at 1000°C and 1200°C in Ar–20 vol% O<sub>2</sub>. High-temperature oxidation results in growth of bi-layered oxide scales, featuring an outer Cr₂O₃ layer and an inner Cr–Ta oxide layer. The Cr–Ta oxide layer consists of two distinct phases: CrTaO₄ and CrTa₂O₆. Significant improvements in oxidation resistance are found for Co and Fe alloys, in consequence of formation of the Cr–Ta oxides. At 1200°C, oxidation kinetics approach a cubic growth law after an initial transient stage, underscoring the exceptional protective capabilities of the Cr–Ta oxides.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112847"},"PeriodicalIF":7.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-06DOI: 10.1016/j.corsci.2025.112851
Minyi Zhang , Guanze He , Robin Scales , Kay Song , Mark Lapington , Weiyue Zhou , Zhiyuan Ding , Michael P. Short , Paul A.J. Bagot , Michael P. Moody , Felix Hofmann
Gen IV nuclear reactors promise better safety, economic benefits and a potential path to reducing carbon emissions. The liquid lead-bismuth eutectic (LBE) cooled fast reactor is a key Gen IV reactor concept. This study investigates the corrosion of T91 steel, a candidate structural material for Gen IV reactors, exposed to liquid LBE. Specifically, we focus on the dissociation of Cr carbides and the overall Cr depletion adjacent to the corrosion interface. Our results suggest a correlation between Cr depletion and phase transformation in the steel, most likely ferritization. We have analysed the corrosion-induced changes from the micro- to atomic-scale by combining complementary characterisation techniques: SEM, EDX, (HR)EBSD, DAXM, (S)TEM, EELS, and APT. Based on these investigations, we propose a potential mechanism of Cr depletion, Cr carbides dissociation, and phase transformation in T91 induced by LBE exposure. These microstructural changes may alter the mechanical properties, and are thus of direct importance to reactor designs, safety, and lifetime estimation.
{"title":"Correlated chromium carbide dissociation and phase transformation in liquid lead-bismuth eutectic corroded T91 steel","authors":"Minyi Zhang , Guanze He , Robin Scales , Kay Song , Mark Lapington , Weiyue Zhou , Zhiyuan Ding , Michael P. Short , Paul A.J. Bagot , Michael P. Moody , Felix Hofmann","doi":"10.1016/j.corsci.2025.112851","DOIUrl":"10.1016/j.corsci.2025.112851","url":null,"abstract":"<div><div>Gen IV nuclear reactors promise better safety, economic benefits and a potential path to reducing carbon emissions. The liquid lead-bismuth eutectic (LBE) cooled fast reactor is a key Gen IV reactor concept. This study investigates the corrosion of T91 steel, a candidate structural material for Gen IV reactors, exposed to liquid LBE. Specifically, we focus on the dissociation of Cr carbides and the overall Cr depletion adjacent to the corrosion interface. Our results suggest a correlation between Cr depletion and phase transformation in the steel, most likely ferritization. We have analysed the corrosion-induced changes from the micro- to atomic-scale by combining complementary characterisation techniques: SEM, EDX, (HR)EBSD, DAXM, (S)TEM, EELS, and APT. Based on these investigations, we propose a potential mechanism of Cr depletion, Cr carbides dissociation, and phase transformation in T91 induced by LBE exposure. These microstructural changes may alter the mechanical properties, and are thus of direct importance to reactor designs, safety, and lifetime estimation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112851"},"PeriodicalIF":7.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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