Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D

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	Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D
	H. P. Duan; C. W. Yan; F. H. Wang
	2007
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	52 期号:11 页码:3785-3793
摘要	Various plasma electrolytic oxidation (PEO) films were prepared on magnesium alloy AZ91D in a silicate bath with different additives such as phosphate, fluoride and borate. Effects of the additives on chemical composition and corrosion resistance of the PEO films were examined by means of scanning electron microscopy (SEM), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The results showed that the PEO films obtained in solutions with both borate and fluoride had better corrosion resistance. In order to understand the corrosion mechanism of PEO films on magnesium alloy AZ91D, electronic property of the magnesium electrode with PEO films was studied by Mott-Schottky approach in a solution containing borate and chloride. The results indicated that magnesium electrodes with and without PEO films all exhibited n-type semiconducting property. However, in comparison with the magnesium electrode treated in solutions containing phosphate or borate, the electrode treated in solutions containing both borate and fluoride (M-film) had lower donor concentration and much negative flat band potential; therefore, the M-film had lower reactivity and higher corrosion resistance. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, met res inst, state key lab corros & protect, shenyang 110016, peoples r china.;yan, cw (reprint author), chinese acad sci, met res inst, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;hpduan@imr.ac.cn
关键词	Magnesium Alloy Az91d Peo Film Additives Corrosion Resistance Semiconducting Property Electrochemical Impedance Spectroscopy Micro-arc Oxidation Borate Buffer Solution Corrosion-resistance Anodic Films Phosphate Coatings Fluoride Solutions Alkaline-solutions Passive Film Oxide-films
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WOS记录号	WOS:000245369300041
引用统计	被引频次：363[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/321006/33510
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. P. Duan,C. W. Yan,F. H. Wang. Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D[J]. Electrochimica Acta,2007,52(11):3785-3793.
APA	H. P. Duan,C. W. Yan,&F. H. Wang.(2007).Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D.Electrochimica Acta,52(11),3785-3793.
MLA	H. P. Duan,et al."Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D".Electrochimica Acta 52.11(2007):3785-3793.