Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel

doi:10.1016/j.corsci.2021.109588

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	Atomic-scale evidence for the intergranular corrosion mechanism induced by co-segregation of low-chromium ferritic stainless steel
	Hu, Shuai 1,2; Han, En-Hou 1; Liu, Xianbin 1
刊名	CORROSION SCIENCE
	2021-08-15
卷号	189 页码:7
关键词	Ferritic stainless steel Intergranular corrosion Co-segregation Cr-depletion Prevention
ISSN号	0010-938X
DOI	10.1016/j.corsci.2021.109588
通讯作者	Han, En-Hou(ehhan@imr.ac.cn)
英文摘要	The 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.
资助项目	Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDY-SSW-JSC012]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000677547100003
资助机构	Key Research Program of Frontier Sciences, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159773]
专题	金属研究所_中国科学院金属研究所
通讯作者	Han, En-Hou
作者单位	1.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
推荐引用方式 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.