Corrosion Science最新文献_第2页

Mechanistic insight into pre-strain influenced stress corrosion cracking of advanced high-strength steels in marine environment 预应变对海洋环境中高级高强钢应力腐蚀开裂影响的机理研究

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-21 DOI: 10.1016/j.corsci.2025.113057

Yifan Zheng , Zhihui Wang , Xian Zhang , Zhicheng Su , Jing Liu , Rui Yu , Kaiming Wu

{"title":"Mechanistic insight into pre-strain influenced stress corrosion cracking of advanced high-strength steels in marine environment","authors":"Yifan Zheng , Zhihui Wang , Xian Zhang , Zhicheng Su , Jing Liu , Rui Yu , Kaiming Wu","doi":"10.1016/j.corsci.2025.113057","DOIUrl":"10.1016/j.corsci.2025.113057","url":null,"abstract":"<div><div>This study investigates the stress corrosion behavior of ultrafine bainite (UFB) and quenched-partitioning (Q&P) steels with identical compositions under pre-strain (1σ<sub>s</sub>) in marine environment. After pre-strain treatment, the TRIP effect reduced the retained austenite content in both steels. Pre-strain induced the transformation of retained austenite blocks into strain-induced martensite, increasing stress concentration. The micro-galvanic effect and high dislocation density in the multiphase structure enhanced electrochemical activity, promoting crack initiation. However, the transformation of retained austenite films into plastic lath martensite passivated crack tips，delaying crack propagation. Q&P steel with more retained austenite blocks exhibited higher stress corrosion cracking (SCC) susceptibility than that of UFB steel, due to accelerated micro-galvanic corrosion, localized stress concentration and defective rust layers. Finite element analysis further confirmed the electrochemical-mechanical coupling mechanism.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113057"},"PeriodicalIF":7.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166248","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}

引用次数: 0

Mechanisms of steam oxidation-induced degradation of chromium coating on zirconium alloys at high temperatures 锆合金表面铬涂层高温蒸汽氧化降解机理研究

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-20 DOI: 10.1016/j.corsci.2025.113055

Dongju Kim, Youho Lee

{"title":"Mechanisms of steam oxidation-induced degradation of chromium coating on zirconium alloys at high temperatures","authors":"Dongju Kim, Youho Lee","doi":"10.1016/j.corsci.2025.113055","DOIUrl":"10.1016/j.corsci.2025.113055","url":null,"abstract":"<div><div>Steam oxidation experiments combined with extensive material characterizations were conducted to investigate the comprehensive microstructural mechanisms and kinetics responsible for the degradation of chromium coatings on zirconium alloys under high-temperature steam oxidation conditions. A mechanistic framework was developed to integrate key degradation phenomena, potentially enabling quantitative prediction of coating protection loss onset and subsequent oxidation behaviors. The findings reveal a general phenomenological framework comprising four critical factors: transient Cr-coating thickness, grain boundary density, Zr diffusion along grain boundaries, and Cr₂O₃ layer reduction and oxygen ingress. Transient Cr-coating thickness, influenced by oxidation and diffusion losses, determines the Zr diffusion length and, thus, protection duration. Significant grain growth at high temperatures was observed, varying substantially with coating fabrication methods and initial microstructural conditions. Zr diffusion primarily occurred along high-angle grain boundaries, forming intergranular ZrO<sub>2</sub> phases and associated defects such as twins and dislocations. Parameters governing protection loss were established. The first transition time, marking Zr reaching the Cr/Cr₂O₃ interface, was proportional to the square of the initial coating thickness. The second transition, characterized by the loss of Cr₂O₃ layer protectiveness and a sharp increase in oxidation rate, occurs when voids formed by Cr₂O₃ reduction interconnect across a substantial portion of the oxide layer. This interconnected void structure provides direct steam access to Zr diffusion paths, significantly accelerating oxygen uptake and resulting in complete coating degradation. Post-protection oxidation kinetics were controlled by oxygen diffusion rate along ZrO<sub>2</sub> path. This framework provides a robust basis for predicting Cr-coating degradation on zirconium by steam oxidation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113055"},"PeriodicalIF":7.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137827","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}

引用次数: 0

Insight into the self-healing performance of dicalcium phosphate dihydrate coating on magnesium wires: Its damage and anti-corrosive behavior under deformation 镁丝表面二水合磷酸二钙自愈性能的研究：变形下的损伤与抗腐蚀性能

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-20 DOI: 10.1016/j.corsci.2025.113051

Yue Zhang , Tingjie Nie , Dongfang Chen , Genzhi Jiang , Wen Xu , Huan Liu , Kun Qian , Jia Ju , Chenglin Chu , Feng Xue , Yuanding Huang , Norbert Hort , Jing Bai

{"title":"Insight into the self-healing performance of dicalcium phosphate dihydrate coating on magnesium wires: Its damage and anti-corrosive behavior under deformation","authors":"Yue Zhang , Tingjie Nie , Dongfang Chen , Genzhi Jiang , Wen Xu , Huan Liu , Kun Qian , Jia Ju , Chenglin Chu , Feng Xue , Yuanding Huang , Norbert Hort , Jing Bai","doi":"10.1016/j.corsci.2025.113051","DOIUrl":"10.1016/j.corsci.2025.113051","url":null,"abstract":"<div><div>Deformation-induced coating damage during surgery and service has always been difficult for surface-treated magnesium (Mg) implants. Recently, self-healing coatings have been increasingly developed for biomedical magnesium applications, presenting a promising approach to address this issue. However, the behavior of coating damage caused by deformation and its following effects on the coating availability is ambiguous. In this work, dicalcium phosphate dihydrate (DCPD) coating was applied as a self-healing agent on the bare and micro-arc oxidation (MAO)-coated Mg-2Zn (wt%) wires with a diameter of about 300 μm. After these wires were bent to 90°, their coatings were damaged in various degrees by peeling and cracking on their concave and convex sides, respectively. Compared to coatings before deformation, the corrosion inhibition of these damaged coatings in Hanks’ balanced salt solution (HBSS) decreased significantly. The corrosion resistance of deformed MAO-coated and MAO&DCPD (M&D)-coated wires increased with prolonged immersion time at the early corrosion stage, while that of the DCPD-coated wire remained stable. The long-term immersion results showed that the M&D-coated wire had the lowest corrosion rate. DCPD could exhibit its self-healing ability on the MAO-coated Mg wire during immersion but not on the bare wire. Given the good biocompatibility of wires after DCPD treatment, this dual-layered M&D coating is more suitable for Mg implants under deformation than the MAO coating or DCPD coating alone. Additionally, the poor performance of DCPD-coated Mg wire suggests the damage and anti-corrosive behavior of coatings on Mg after deformation differ markedly from those observed in existing scratch experiments.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113051"},"PeriodicalIF":7.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107249","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}

引用次数: 0

Design of high temperature oxidation-resistant high-entropy alloys via machine learning and natural mixing process 利用机器学习和自然混合工艺设计高温抗氧化高熵合金

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-20 DOI: 10.1016/j.corsci.2025.113047

Ziqiang Dong , Chao Zhou , Qiliang Huang , Zhengkun Mou , Ming Li , Hongyu Zhou , Wenyue Zheng

{"title":"Design of high temperature oxidation-resistant high-entropy alloys via machine learning and natural mixing process","authors":"Ziqiang Dong , Chao Zhou , Qiliang Huang , Zhengkun Mou , Ming Li , Hongyu Zhou , Wenyue Zheng","doi":"10.1016/j.corsci.2025.113047","DOIUrl":"10.1016/j.corsci.2025.113047","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) have attracted significant attention for their exceptional properties, particularly their potential in high-temperature engineering applications. However, the large compositional space of HEAs presents challenges in alloy design to achieve optimal properties. In this study, we developed an integrated approach that combines machine learning (ML) and a natural mixing process to guide the design of HEAs with enhanced high-temperature stability. ML was used to assist in element selection and oxidation prediction, while the natural mixing and short-term high-temperature exposure guided the formulation of HEA compositions with superior thermal stability. Among the ML models evaluated, the Gradient Boosting Regression (GBR) model showed the highest prediction accuracy (R<sup>2</sup>= 0.94). A series of HEAs were designed using the integrated approach, and their oxidation behavior was thoroughly investigated. The designed alloy H3 (AlCrCu<sub>0.4</sub>FeNi) showed excellent oxidation resistance (k<sub>p</sub>=1.19 ×10<sup>−2</sup> mg<sup>2</sup>/cm<sup>4</sup>·h) with a high hardness (865 HV), demonstrating its potential for high-temperature applications.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113047"},"PeriodicalIF":7.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166247","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}

引用次数: 0

HiPIMS-enabled Ti-doped amorphous carbon coatings for high-performance PEMFC bipolar plates 用于高性能PEMFC双极板的hipims掺杂钛非晶碳涂层

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-20 DOI: 10.1016/j.corsci.2025.113053

Zhiqiang Che , Yi Feng , Hui Chen , Xiaopan Wu , Haoqi Wang , Wenping Yuan , Qili Jiang , Li Hou , Yixiang Ou , Feiqiang Li , Peng-an Zong

{"title":"HiPIMS-enabled Ti-doped amorphous carbon coatings for high-performance PEMFC bipolar plates","authors":"Zhiqiang Che , Yi Feng , Hui Chen , Xiaopan Wu , Haoqi Wang , Wenping Yuan , Qili Jiang , Li Hou , Yixiang Ou , Feiqiang Li , Peng-an Zong","doi":"10.1016/j.corsci.2025.113053","DOIUrl":"10.1016/j.corsci.2025.113053","url":null,"abstract":"<div><div>Amorphous carbon (<em>α</em>-C) coatings play a critical role in enhancing the electrical conductivity, corrosion resistance, and chemical stability of stainless steel bipolar plates in proton exchange membrane fuel cells (PEMFCs). However, traditional deposition methods, such as magnetron sputtering and chemical vapor deposition, suffer from limitations including suboptimal sp²/sp³ ratios, high residual stress, and insufficient mechanical durability, restricting their application. This study develops Ti-doped <em>α</em>-C coatings using a combined high power impulse magnetron sputtering (HiPIMS) and pulsed DC magnetron sputtering (PDCMS) approach to overcome these challenges. By varying Ti target power (0–1 kW), the microstructure, electrical properties, corrosion resistance, and mechanical performance of the coatings were systematically investigated. Ti doping increased the sp²/sp³ ratio and promoted low-resistivity carbide phase formation, reducing the interfacial contact resistance from 5.8 to 2.6 mΩ cm<sup>2</sup> (0.6 kW). At an optimal Ti target power of 0.6 kW, the coatings achieved excellent corrosion resistance, with a corrosion current density of 0.12 μA cm<sup>−2</sup>. Additionally, mechanical properties were significantly enhanced, with hardness reaching 13.64 GPa and elastic recovery improving to 43 %. These findings demonstrate that Ti-doped <em>α</em>-C coatings not only address the limitations of traditional <em>α</em>-C deposition techniques but also offer a cost-effective, high-performance solution for stainless steel bipolar plates, advancing the commercialization of PEMFCs.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113053"},"PeriodicalIF":7.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098419","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}

引用次数: 0

Gravity-driven corrosion effects in microbiologically influenced corrosion: Circumferential corrosion distribution of 90/ 10 Cu-Ni alloy by Desulfovibrio vulgaris 微生物影响腐蚀中的重力驱动腐蚀效应：普通脱硫弧菌对90/ 10 Cu-Ni合金的环向腐蚀分布

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-19 DOI: 10.1016/j.corsci.2025.113049

Congrui Zhu , Yanan Pu , Zihao Guo , Yue Hou , Su Hou , Fan Feng , Bo Zhang , Caichang Dong , Delin Tang , Shougang Chen

{"title":"Gravity-driven corrosion effects in microbiologically influenced corrosion: Circumferential corrosion distribution of 90/ 10 Cu-Ni alloy by Desulfovibrio vulgaris","authors":"Congrui Zhu , Yanan Pu , Zihao Guo , Yue Hou , Su Hou , Fan Feng , Bo Zhang , Caichang Dong , Delin Tang , Shougang Chen","doi":"10.1016/j.corsci.2025.113049","DOIUrl":"10.1016/j.corsci.2025.113049","url":null,"abstract":"<div><div>This work systematically examined the impact of gravity on <em>Desulfovibrio vulgaris</em> deposition, biofilm formation, and microbiologically influenced corrosion (MIC) behavior on 90/10 copper-nickel (Cu-Ni) at different clock positions (6 P, 9 P, and 12 P). Gravity exerted a significant influence on biofilm formation and the severity of MIC on 90/10 Cu-Ni alloy. The circumferential corrosion distribution on the inner surface of alloy pipeline exhibited substantial positional variation, with the most severe corrosion occurring at 6 P. Under static incubation conditions, the <em>D. vulgaris</em> sessile cell count at 6 P was 28 % higher than 12 P, and the weight loss at 6 P reached 8.6 ± 0.5 mg/cm<sup>2</sup>, which was 1.3-fold and 1.7-fold greater than that at 9 P and 12 P, respectively. The thickness of <em>D. vulgaris</em> biofilm and MIC progression followed the trend: 6 P > 9 P > 12 P. Under dynamic incubation conditions, the differences in MIC across the positions diminished due to shear stress modulating the development of the <em>D. vulgaris</em> biofilm. Stirring mitigated gravitational effects, promoting a more uniform <em>D. vulgaris</em> biofilm distribution and MIC rate.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113049"},"PeriodicalIF":7.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098531","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}

引用次数: 0

Understanding of the stress assisted cracking behavior of Ni-based alloy GH3535 in molten LiF-NaF-KF salt ni基合金GH3535在LiF-NaF-KF熔盐中的应力辅助开裂行为

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-16 DOI: 10.1016/j.corsci.2025.113038

Wenjun Liang , Xiaoli Li , Yumiao Wang , Bin Leng , Tao Wu , Litao Chang

{"title":"Understanding of the stress assisted cracking behavior of Ni-based alloy GH3535 in molten LiF-NaF-KF salt","authors":"Wenjun Liang , Xiaoli Li , Yumiao Wang , Bin Leng , Tao Wu , Litao Chang","doi":"10.1016/j.corsci.2025.113038","DOIUrl":"10.1016/j.corsci.2025.113038","url":null,"abstract":"<div><div>Environmentally assisted cracking of structural materials is an important concern to the safe operation of advanced nuclear reactors. In the present study, the responses of Ni-based alloy GH3535 to the combined effects of tensile stress and molten fluoride salt corrosion was investigated using constant load tensile testing alongside with specimens tested in Ar. The results indicated that extensive intergranular cracking occurred in specimens tested in both environments, however, specimens tested in the molten salt had a much faster displacement/creep rate than those tested in Ar. All the cracks were internally initiated within the sub-surface region of the specimens, with no cracking observed in the substrate. For specimens tested in Ar, most of the cracks were found to be beneath the surface, whereas the cracks propagated to the surface and penetrated deeper to the substrate for specimens tested in the molten salt. All the cracks were confirmed to be creep cracks, and it was found that initiation of the internal creep cracks was promoted by the deformation induced by the surface machining process. Furthermore, increased creep rates for specimens tested in molten salt was due to stress concentration at the crack tips, caused by the fracture of the interconnected, topmost recrystallized fine-grained layer.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113038"},"PeriodicalIF":7.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070334","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}

引用次数: 0

Hot corrosion behavior of 304 & P91 graded composite transition joint under molten sulfate salts 硫酸盐熔盐作用下304 & P91级配复合过渡接头的热腐蚀行为

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-16 DOI: 10.1016/j.corsci.2025.113033

Ting Sun , Shanshan Hu , Alexander I. Ikeuba , Yuying Wen , Xingru Tan , Youyuan Zhang , Haiyang Qian , Yanli Wang , Zhili Feng , Bai Cui , Xingbo Liu

{"title":"Hot corrosion behavior of 304 & P91 graded composite transition joint under molten sulfate salts","authors":"Ting Sun , Shanshan Hu , Alexander I. Ikeuba , Yuying Wen , Xingru Tan , Youyuan Zhang , Haiyang Qian , Yanli Wang , Zhili Feng , Bai Cui , Xingbo Liu","doi":"10.1016/j.corsci.2025.113033","DOIUrl":"10.1016/j.corsci.2025.113033","url":null,"abstract":"<div><div>A novel graded composite transition joint (GCTJ) between AISI 304 stainless steel and ASTM A335 P91 steel, has been demonstrated remarkablely superior creep performance compared to the conventional dissimilar metal weldment (DMW) under equivalent conditions. However, this advance is challenged by hot corrosion under salt deposition at elevated temperatures. This study investigates the hot corrosion behavior of 304&P91 GCTJ exposed to sulfate salts at 700°C. Compared to the 304 steel, corrosion attacks initiate in the P91 triangle, where the dual-phase microstructure of ferrite and tempered martensite significantly influences pitting initiation. Anodic dissolution mainly occurs within the tempered martensite due to more vulnerable sites within the tempered martensite. With prolonged exposure, corrosion propagates across both phases, and the corrosion depth within the P91 triangle is related to the exposed surface area ratio between 304 and P91. Electrochemical analysis reveals the occurrence of galvanic corrosion between the 304 and P91, with a positive linear relationship between anodic dissolution current density (I<sub>a</sub>) and the exposed surface area ratio between 304 and P91 in molten salts, further emphasizing the critical impact of this ratio on the corrosion severity in the P91 triangle. These findings underscore the importance of transition zone design optimization in mitigating localized corrosion.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113033"},"PeriodicalIF":7.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098420","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}

引用次数: 0

Corrosion behaviour of 316L stainless steel under stress in artificial seawater droplet exposure at elevated temperature and humidity 高温高湿条件下316L不锈钢在人工海水液滴中的应力腐蚀行为

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-16 DOI: 10.1016/j.corsci.2025.113039

M.C. Ozturk , L. Coghlan , M. Zimina , R. Akid , T.L. Martin , N.O. Larrosa

{"title":"Corrosion behaviour of 316L stainless steel under stress in artificial seawater droplet exposure at elevated temperature and humidity","authors":"M.C. Ozturk , L. Coghlan , M. Zimina , R. Akid , T.L. Martin , N.O. Larrosa","doi":"10.1016/j.corsci.2025.113039","DOIUrl":"10.1016/j.corsci.2025.113039","url":null,"abstract":"<div><div>Chloride-induced pitting corrosion and stress corrosion cracking could present potential damage mechanisms in high activity waste (HAW) containers made of austenitic stainless steels operating at room temperature, elevated temperature, and humidity. In this paper, atmospheric corrosion tests were conducted on cold-rolled 316 L stainless steel (SS) specimens—both sensitised and non-sensitised—subjected to varying levels of applied stress (ranging from 0 to 1.5 times the yield strength, σ<sub>y</sub>) in the presence of 0.546 mol/L artificial seawater droplets. A subset of the samples was thermally sensitised at 550°C for 150 hours. The experiments were conducted at room temperature (RT) and humidity levels, and at 50°C and 60 % relative humidity (RH), using a custom-made environmental corrosion chamber for 672 hours. Stress was applied using a 4-point bending rig, and artificial seawater droplets were delivered via a SS 304 medical syringe needle. Correlative microscopy (SEM and EBSD), optical profilometry, and dry vapor etching techniques revealed pit initiation sites and growth predominantly occurring at grain boundaries along the rolling direction. Sensitisation and increased applied stress led to a rise in both the number and size of corrosion pits, as observed in experiments conducted both at room temperature and in the corrosion chamber.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113039"},"PeriodicalIF":7.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115867","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}

引用次数: 0

Design and evaluation method of erosion-resistant and wear-resistant CoCrFeMnNi high-entropy alloy coating based on molecular dynamics simulation and machine learning 基于分子动力学模拟和机器学习的CoCrFeMnNi高熵合金耐冲磨涂层设计与评价方法

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-05-16 DOI: 10.1016/j.corsci.2025.113048

Yunhai Liu, Jiawei Xie, Lang Tang

{"title":"Design and evaluation method of erosion-resistant and wear-resistant CoCrFeMnNi high-entropy alloy coating based on molecular dynamics simulation and machine learning","authors":"Yunhai Liu, Jiawei Xie, Lang Tang","doi":"10.1016/j.corsci.2025.113048","DOIUrl":"10.1016/j.corsci.2025.113048","url":null,"abstract":"<div><div>The CoCrFeMnNi high-entropy alloy is widely regarded as one of the most promising materials for wear resistance, particularly in mitigating erosion failure in critical components of oil and gas equipment. However, its performance is significantly influenced by factors such as elemental composition and proportion. Therefore, determining the optimal parameters for preparing erosion-resistant alloys has become a significant challenge. In this study, for the first time, we establish an erosion resistance design evaluation system that integrates molecular dynamics and machine learning. This system incorporates parameters such as pressure, friction coefficient, and the number of wear atoms, and a high-performance machine learning model is trained to predict the optimal erosion-resistant coating and verify. Furthermore, to enhance the applicability of the design evaluation method, the trained machine learning model can be directly employed to guide the alloy component design under different crystal orientations and structures post-verification. The results of this study offer significant theoretical insights for the development of the optimal erosion-resistant CoCrFeMnNi high-entropy alloy for oil and gas equipment, while also substantially reducing both experimental and temporal costs.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"254 ","pages":"Article 113048"},"PeriodicalIF":7.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084137","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}

引用次数: 0