Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system

IMR OpenIR

	Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system
其他题名	Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system
	Li Huabing; Jiang Zhouhua; Feng Hao; Zhu Hongchun; Sun Binhan; Li Zhen
	2013
发表期刊	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN	1674-4799
卷号	20 期号:9 页码:850-860
摘要	The effect of chloride ion concentration, pH value, and grain size on the pitting corrosion resistance of a new ferritic stainless steel with 15wt% Cr was investigated using the anodic polarization method. The semiconducting properties of passive films with different chloride ion concentrations were performed using capacitance measurement and Mott-Schottky analysis methods. The aging precipitation and intergranular corrosion behavior were evaluated at 400-900A degrees C. It is found that the pitting potential decreases when the grain size increases. With the increase in chloride ion concentration, the doping density and the flat-bland potential increase but the thickness of the space charge layer decreases. The pitting corrosion resistance increases rapidly with the decrease in pH value. Precipitants is identified as Nb(C,N) and NbC, rather than Cr-carbide. The intergranular corrosion is attributed to the synergistic effects of Nb(C,N) and NbC precipitates and Cr segregation adjacent to the precipitates.
其他摘要	The effect of chloride ion concentration, pH value, and grain size on the pitting corrosion resistance of a new ferritic stainless steel with 15wt% Cr was investigated using the anodic polarization method. The semiconducting properties of passive films with different chloride ion concentrations were performed using capacitance measurement and Mott-Schottky analysis methods. The aging precipitation and intergranular corrosion behavior were evaluated at 400–900°C. It is found that the pitting potential decreases when the grain size increases. With the increase in chloride ion concentration, the doping density and the flat-bland potential increase but the thickness of the space charge layer decreases. The pitting corrosion resistance increases rapidly with the decrease in pH value. Precipitants is identified as Nb(C,N) and NbC, rather than Cr-carbide. The intergranular corrosion is attributed to the synergistic effects of Nb(C,N) and NbC precipitates and Cr segregation adjacent to the precipitates.
关键词	SEMICONDUCTING PROPERTIES PASSIVE FILM CHLORIDE ferritic stainless steel corrosion resistance pitting chlorides intergranular corrosion grain size
收录类别	CSCD
语种	英语
资助项目	[Program for Liaoning Innovative Research Team in University] ; [Fundamental Research Funds for the Central Universities] ; [General Scientific Research Project of the Department of Education of Liaoning Province, China]
CSCD记录号	CSCD:4932755
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/152451
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,Feng Hao,et al. Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2013,20(9):850-860.
APA	Li Huabing,Jiang Zhouhua,Feng Hao,Zhu Hongchun,Sun Binhan,&Li Zhen.(2013).Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,20(9),850-860.
MLA	Li Huabing,et al."Corrosion behavior of ferritic stainless steel with 15wt% chromium for the automobile exhaust system".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 20.9(2013):850-860.