The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization

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	The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization
	W. Ye ; Y. Li ; F. H. Wang
刊名	Electrochimica Acta
	2009
卷号	54 期号:4 页码:1339-1349
关键词	309 stainless steel Nano-crystalline coating Transpassive Oxide film EPMA iron-chromium alloys dissolution mechanism sulfate-solutions passive films metals ni cr molybdenum impedance stability
ISSN号	0013-4686
中文摘要	The effect of nano-crystallization on the corrosion behavior of 309 stainless steel in the transpassive region was investigated in 0.5 M Na(2)SO(4) (pH 2) solution. Three parts defined as transpassive dissolution, secondary passivity and oxygen evolution can be observed in the transpassive potential region of the anodic polarization Curves. In the whole transpassive region the nano-crystalline coating has a smaller corrosion current density than the bulk steel, which indicates the transpassive dissolution rate is decreased by nanocrystallization. In addition. there is an obvious difference in the surface micrographs of the two materials at transpassive potentials, as scanning electron microscopy (SEM) shows. The electron probe microanalysis (EPMA) reveals that nano-crystallization improves the homogeneity of Cr on the surface. Mott-Schottky plots displays that the carrier density of the oxide film in the transpassive region is decreased by nanocrystallization. Thus, the interfacial reactions are decelerated and the corrosion resistance of the stainless steel in the transpassive region has been greatly improved by nano-crystallization. (C) 2008 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000262810900026
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/32502]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Ye,Y. Li,F. H. Wang. The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization[J]. Electrochimica Acta,2009,54(4):1339-1349.
APA	W. Ye,Y. Li,&F. H. Wang.(2009).The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization.Electrochimica Acta,54(4),1339-1349.
MLA	W. Ye,et al."The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization".Electrochimica Acta 54.4(2009):1339-1349.