Influence of cerium on passivity behavior of wrought AZ91 alloy

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	Influence of cerium on passivity behavior of wrought AZ91 alloy
	H. N. Wang; Y. Li; F. H. Wang
	2008
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	54 期号:2 页码:706-713
摘要	in this paper, more focus had been put on the passivity behavior of wrought AZ91 alloy with 1.5 mass% Ce. The passive current density of wrought AZ91 alloy increased with addition of Ce and the passive film became unstable. Structures and compositions of the passive films formed on wrought AZ91 alloy without and with Ce in 0.01 M NaOH aqueous solution were analyzed by potentiostatic polarization, potentiostatic-galvanostatic (P-G) transient technique and X-ray photoelectron spectroscopy (XPS). The results showed that Ce only accumulated in the inner layer of passive film in the form of CeO(2). Further analysis revealed that there were two main effects of Ce on the passive process of wrought AZ91 alloy: first, the existence of CeO(2) in inner layer of passive film made mass transport through the passive film follow tangent hyperbolic (T) impedance instead of Warburg impedance (W): second, donor concentration (N(d)) of the passive film increased by a factor 10 when 1.5 mass% Ce existed in wrought AZ91 alloy, which led to the higher passivity current density. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属	[wang, henan; li, ying; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;li, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110016, peoples r china;liying@imr.ac.cn
关键词	Passivity Wrought Az91 Alloy Cerium Impedance Donor Concentration (n(d)) Corrosion Behavior Magnesium Alloy Microstructure Chloride Phase Films
URL	查看原文
WOS记录号	WOS:000263282400084
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33128
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. N. Wang,Y. Li,F. H. Wang. Influence of cerium on passivity behavior of wrought AZ91 alloy[J]. Electrochimica Acta,2008,54(2):706-713.
APA	H. N. Wang,Y. Li,&F. H. Wang.(2008).Influence of cerium on passivity behavior of wrought AZ91 alloy.Electrochimica Acta,54(2),706-713.
MLA	H. N. Wang,et al."Influence of cerium on passivity behavior of wrought AZ91 alloy".Electrochimica Acta 54.2(2008):706-713.