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Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel
Hu, Shuai1,2; Han, En-Hou1; Liu, Xianbin1
Corresponding AuthorHan, En-Hou(ehhan@imr.ac.cn)
2021-08-15
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume189Pages:7
AbstractThe composition distribution around grain boundaries of low-chromium ferritic stainless steels was investigated by the techniques of three-dimensional atom probe and focused ion beam. It was found that Cr atoms segregated largely (up to as much as 22.4 at.%) at grain boundaries with co-segregation of other solute atoms in the absence of Cr-carbides precipitation. The co-segregation induced the formation of a Cr-depleted zone (down to only 9.3 at.%) leading to intergranular corrosion. Based on the new mechanism, a novel concept of reducing or even preventing the grain boundary segregation to prevent intergranular corrosion at the level of dynamics/thermodynamics was proposed.
KeywordFerritic stainless steel Intergranular corrosion Co-segregation Cr-depletion Prevention
Funding OrganizationKey Research Program of Frontier Sciences, Chinese Academy of Sciences
DOI10.1016/j.corsci.2021.109588
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDY-SSW-JSC012]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000677547100003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159774
Collection中国科学院金属研究所
Corresponding AuthorHan, En-Hou
Affiliation1.Chinese Acad Sci, Inst Met Res, Natl Engn Res Ctr Corros Control, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 110016, Peoples R China
Recommended Citation
GB/T 7714
Hu, Shuai,Han, En-Hou,Liu, Xianbin. Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel[J]. CORROSION SCIENCE,2021,189:7.
APA Hu, Shuai,Han, En-Hou,&Liu, Xianbin.(2021).Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel.CORROSION SCIENCE,189,7.
MLA Hu, Shuai,et al."Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel".CORROSION SCIENCE 189(2021):7.
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