Effects of a small addition of Mn on the corrosion behaviour of Zn in a mixed solution

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	Effects of a small addition of Mn on the corrosion behaviour of Zn in a mixed solution
	B. Zhang; H. B. Zhou; E. H. Han; W. Ke
	2009
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	54 期号:26 页码:6598-6608
摘要	The effects of a small addition of Mn (0.4 wt%) on the corrosion behaviour of pure Zn (99.995 wt%) in a mixed solution (0.1 M NaCl + 0.1 M Na(2)SO(4) + 0.01 M NaHCO(3), pH 8.4) were investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and X-ray photoelectron spectroscopy (XPS). The electrochemical impedances of both Zn and Zn-0.4Mn have been successfully fitted with a suitable EIS equivalent circuit model. Fitted impedance results revealed that 0.4wt% Mn improved both the pore resistance and charge transfer resistance of Zn in the mixed solution. As a result, both anodic and cathodic reaction rates were reduced. X-ray photoelectron spectroscopy (XPS) analysis showed that the corrosion films formed in the mixed solution consisted of zinc oxide (ZnO), zinc hydroxide (Zn(OH)(2)) and zinc hydrozincite (Zn(5)(CO(3))(2)(OH)(6)). The role of small addition of Min is that it promotes the precipitation of hydrozincite in the pores of corrosion film. An "alleviation of local acidification" mechanism is proposed to explain the investigated results. (C) 2009 Elsevier Ltd. All rights reserved.
部门归属	[zhang, bo; zhou, hai-bo; han, en-hou; ke, wei] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;zhang, b (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;bxz011@imr.ac.cn
关键词	Zn Mn Addition Corrosion Eis Xps Electrochemical Impedance Spectroscopy Sodium-chloride Solution Alloy Coatings Electrodeposited Zn Protective Ability Alkaline-solutions Doped Zno Zinc Resistance Steel
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WOS记录号	WOS:000270646600068
引用统计	被引频次：41[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/321006/32524
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Zhang,H. B. Zhou,E. H. Han,et al. Effects of a small addition of Mn on the corrosion behaviour of Zn in a mixed solution[J]. Electrochimica Acta,2009,54(26):6598-6608.
APA	B. Zhang,H. B. Zhou,E. H. Han,&W. Ke.(2009).Effects of a small addition of Mn on the corrosion behaviour of Zn in a mixed solution.Electrochimica Acta,54(26),6598-6608.
MLA	B. Zhang,et al."Effects of a small addition of Mn on the corrosion behaviour of Zn in a mixed solution".Electrochimica Acta 54.26(2009):6598-6608.