Electrodeposition of Al-Mn alloy on AZ31B magnesium alloy in molten salts

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	Electrodeposition of Al-Mn alloy on AZ31B magnesium alloy in molten salts
	J. F. Zhang; C. W. Yan; F. H. Wang
	2009
发表期刊	Applied Surface Science
ISSN	0169-4332
卷号	255 期号:9 页码:4926-4932
摘要	The Al-Mn alloy coatings were electrodeposited on AZ31B Mg alloy in AlCl(3)-NaCl-KCl-MnCl(2) molten salts at 170 degrees C aiming to improve the corrosion resistance. However, in order to prevent AZ31B Mg alloy from corrosion during electrodeposition in molten salts and to ensure excellent adhesion of coatings to the substrate, AZ31B Mg alloy should be pre-plated with a thin zinc layer as intermediate layer. Then the microstructure, composition and phase constituents of the coatings were investigated by scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDX), and X-ray diffraction (XRD). It was indicated that, by adjusting the MnCl(2) content in the molten salts from 0.5 wt% to 2 wt%, the Mn content in the alloy coating was increased and the phase constituents were changed from f.c.c Al-Mn solid solution to amorphous phase. The corrosion resistance of the coatings was evaluated by potentiodynamic polarization measurements in 3.5% NaCl solution. It was confirmed that the Al-Mn alloy coatings exhibited good corrosion resistance with a chear passive region and significantly reduced corrosion current density at anodic potentiodynamic polarization. The corrosion resistance of the alloy coatings was also related with the microstructure and Mn content of the coatings. (C) 2009 Elsevier B. V. All rights reserved.
部门归属	[zhang, jifu; yan, chuanwei; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;yan, cw (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;cwyan@imr.ac.cn
关键词	Magnesium Alloy Electrodeposition Al-mn Alloy Zn Intermediate Layer Corrosion Resistance Sodium Chloride Bath Corrosion-resistance Aluminum Improvement Deposition Powder Melts
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WOS记录号	WOS:000263542700042
引用统计	被引频次：47[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/321006/32550
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. F. Zhang,C. W. Yan,F. H. Wang. Electrodeposition of Al-Mn alloy on AZ31B magnesium alloy in molten salts[J]. Applied Surface Science,2009,255(9):4926-4932.
APA	J. F. Zhang,C. W. Yan,&F. H. Wang.(2009).Electrodeposition of Al-Mn alloy on AZ31B magnesium alloy in molten salts.Applied Surface Science,255(9),4926-4932.
MLA	J. F. Zhang,et al."Electrodeposition of Al-Mn alloy on AZ31B magnesium alloy in molten salts".Applied Surface Science 255.9(2009):4926-4932.