Electrochemical behaviour of high nitrogen bearing stainless steel in acidic chloride solution: Effects of oxygen, acid concentration and surface roughness

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	Electrochemical behaviour of high nitrogen bearing stainless steel in acidic chloride solution: Effects of oxygen, acid concentration and surface roughness
	Y. X. Qiao; Y. G. Zheng; P. C. Okafor; W. Ke
	2009
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	54 期号:8 页码:2298-2304
摘要	The effects of oxygen, H(2)SO(4) concentration and surface roughness on the electrochemical behaviour of high nitrogen bearing stainless steel (HNS) in acidified 0.5 M NaCl solution were investigated using potentiodynamic polarization method. The results revealed three corrosion potentials indicating an unstable system. The number of the potentials was influenced by H(2)SO(4) concentration. Three potentials existed above 0.011 M H(2)SO(4), two between 0.011 and 0.0065 M H(2)SO(4) and one below 0.0065 M H(2)SO(4). Oxygen increased the number of corrosion potential at 0.005 M H(2)SO(4) + 0.5 M NaCl solution while surface roughness had no noticeable influence on the number of potentials but increased the values of the corrosion potentials and passivation current densities with increase in the surface roughness. The corrosion mechanism has been discussed using the ideal polarization curve models. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属	[qiao, y. x.; zheng, y. g.; ke, w.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [okafor, p. c.] univ calabar, dept pure & appl chem, calabar, nigeria.;zheng, yg (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;ygzheng@imr.ac.cn
关键词	Corrosion Stainless Steel Corrosion Potentials Acid Oxygen Surface Roughness Pitting Corrosion Passive Films Reduction Chromium Dissolution Electrodes Hydrogen Iron
URL	查看原文
WOS记录号	WOS:000264303100024
引用统计	被引频次：88[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/321006/32240
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. X. Qiao,Y. G. Zheng,P. C. Okafor,et al. Electrochemical behaviour of high nitrogen bearing stainless steel in acidic chloride solution: Effects of oxygen, acid concentration and surface roughness[J]. Electrochimica Acta,2009,54(8):2298-2304.
APA	Y. X. Qiao,Y. G. Zheng,P. C. Okafor,&W. Ke.(2009).Electrochemical behaviour of high nitrogen bearing stainless steel in acidic chloride solution: Effects of oxygen, acid concentration and surface roughness.Electrochimica Acta,54(8),2298-2304.
MLA	Y. X. Qiao,et al."Electrochemical behaviour of high nitrogen bearing stainless steel in acidic chloride solution: Effects of oxygen, acid concentration and surface roughness".Electrochimica Acta 54.8(2009):2298-2304.