Localized corrosion behavior of scratches on nickel-base Alloy 690TT

IMR OpenIR

	Localized corrosion behavior of scratches on nickel-base Alloy 690TT
	F. J. Meng; E. H. Han; J. Q. Wang; Z. M. Zhang; W. Me
	2011
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	56 期号:4 页码:1781-1785
摘要	Localized corrosion of scratched Alloy 690TT was studied using scanning electrochemical microscopy (SECM) in 10 wt.% NaOH solution and atomic force microscopy (AFM) after short-time oxidation tests in high temperature high pressure water at 250 degrees C. The results show that the scratches detected by SECM displayed more extensive electrochemical activity. The scratch groove and the whole deformed region caused by scratching as anode corresponded to the peak of tip current. The oxides formed in 250 degrees C high purity pressurized water nucleated preferentially at the scratch groove and grew faster than non-scratched surface. The nano-grained scratch groove has more electrochemical reactivity than mechanical twins at scratch banks. The intense localized corrosion could contribute to crack initiation at the bottom of scratch groove. (C) 2010 Elsevier Ltd. All rights reserved.
部门归属	[meng, fanjiang; han, en-hou; wang, jianqiu; zhang, zhiming; me, wei] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;han, eh (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;ehhan@imr.ac.cn
关键词	Scratch Localized Corrosion Secm Crack Initiation Alloy 690 Scanning Electrochemical Microscopy Oxidation Cracking Water
URL	查看原文
WOS记录号	WOS:000287951600012
引用统计	被引频次：45[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/321006/30589
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. J. Meng,E. H. Han,J. Q. Wang,et al. Localized corrosion behavior of scratches on nickel-base Alloy 690TT[J]. Electrochimica Acta,2011,56(4):1781-1785.
APA	F. J. Meng,E. H. Han,J. Q. Wang,Z. M. Zhang,&W. Me.(2011).Localized corrosion behavior of scratches on nickel-base Alloy 690TT.Electrochimica Acta,56(4),1781-1785.
MLA	F. J. Meng,et al."Localized corrosion behavior of scratches on nickel-base Alloy 690TT".Electrochimica Acta 56.4(2011):1781-1785.