Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels

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	Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels
其他题名	Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels
	Li Huabing; Jiang Zhouhua; Yang Yan; Cao Yang; Zhang Zurui
	2009
发表期刊	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN	1674-4799
卷号	16 期号:5 页码:517-524
摘要	Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels (HNSS) were investigated by electrochemical and immersion testing methods in chloride solution, respectively. The chemical constitution and composition in the depth of passive films formed on HNSS were analyzed by X-ray photoelectron spectrum (XPS). HNSS has excellent pitting and crevice corrosion resistance compared to 316L stainless steel. With increasing the nitrogen content in steels, pitting potentials and critical pitting temperature (CPT) increase, and the maximum, average pit depths and average weight loss decrease. The CPT of HNSS is correlated with the alloying element content through the measure of alloying for resistance to corrosion (MARC). The MARC can be expressed as an equation of CPT=2.55MARC-29. XPS results show that HNSS exhibiting excellent corrosion resistance is attributed to the enrichment of nitrogen on the surface of passive films, which forms ammonium ions increasing the local pH value and facilitating repassivation, and the synergistic effects of molybdenum and nitrogen.
其他摘要	Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels (HNSS) were investigated by electrochemical and immersion testing methods in chloride solution, respectively. The chemical constitution and composition in the depth of passive films formed on HNSS were analyzed by X-ray photoelectron spectrum (XPS). HNSS has excellent pitting and crevice corrosion resistance compared to 316L stainless steel. With increasing the nitrogen content in steels, pitting potentials and critical pitting temperature (CPT) increase, and the maximum, average pit depths and average weight loss decrease. The CPT of HNSS is correlated with the alloying element content through the measure of alloying for resistance to corrosion (MARC). The MARC can be expressed as an equation of CPT=2.55MARC-29. XPS results show that HNSS exhibiting excellent corrosion resis-tance is attributed to the enrichment of nitrogen on the surface of passive films, which forms ammonium ions increasing the local pH value and facilitating repassivation, and the synergistic effects of molybdenum and nitrogen.
关键词	PASSIVE FILMS NICKEL high nitrogen austenitic stainless steel pitting corrosion crevice corrosion nitrogen critical pitting temperature synergistic effect
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Baosteel Group Corporation]
CSCD记录号	CSCD:3700074
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/153523
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Li Huabing,Jiang Zhouhua,Yang Yan,et al. Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2009,16(5):517-524.
APA	Li Huabing,Jiang Zhouhua,Yang Yan,Cao Yang,&Zhang Zurui.(2009).Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,16(5),517-524.
MLA	Li Huabing,et al."Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 16.5(2009):517-524.