Effect of small addition of Mn on the passivation of Zn in 0.1 M NaOH solution

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	Effect of small addition of Mn on the passivation of Zn in 0.1 M NaOH solution
	X. L. Shang; B. Zhang; E. H. Han; W. Ke
	2011
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	56 期号:3 页码:1417-1425
摘要	The passivation of pure Zn (99.995 wt%) and Zn-0.4Mn (0.4 wt% Mn) alloy in a deaerated 0.1 M NaOH solution (pH 12.9) was investigated by electrochemical measurements. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The potentiodynamic polarization and electrochemical impedance measurements show that addition of 0.4 wt% Mn can decrease the passive current density of Zn in the passive region. XPS surface analysis indicates that there is approximately 1.0-2.0 at% Mn(2+) being incorporated into the passive film on Zn-0.4Mn alloy with Mn content being higher in the outer layers. Mott-Schottky analysis shows that the incorporated Mn can decrease concentration of defects in the film. AFM observations disclose that Mn can decrease the grain size of the film. The mechanism by which Mn additions improve the passivity of Zn is that the incorporated Mn can inhibit ions transportation in the film and inhibit its growth. Meanwhile. Mn can also promote the nucleation of Zn oxides and decrease film porosity. (C) 2010 Elsevier Ltd. All rights reserved.
部门归属	[shang, xiu-ling; zhang, bo; han, en-hou; ke, wei] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;zhang, b (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;bxz011@imr.ac.cn
关键词	Zn Mn Additions Passivation Xps Afm Electrochemical Impedance Spectroscopy Corrosion-resistance Alloy Coatings Protective Ability Doped Zno Zinc Dissolution Steel Films Co
URL	查看原文
WOS记录号	WOS:000289225400057
引用统计	被引频次：17[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/321006/30643
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. L. Shang,B. Zhang,E. H. Han,et al. Effect of small addition of Mn on the passivation of Zn in 0.1 M NaOH solution[J]. Electrochimica Acta,2011,56(3):1417-1425.
APA	X. L. Shang,B. Zhang,E. H. Han,&W. Ke.(2011).Effect of small addition of Mn on the passivation of Zn in 0.1 M NaOH solution.Electrochimica Acta,56(3),1417-1425.
MLA	X. L. Shang,et al."Effect of small addition of Mn on the passivation of Zn in 0.1 M NaOH solution".Electrochimica Acta 56.3(2011):1417-1425.

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