Influence of phytic acid concentration on performance of phytic acid conversion coatings on the AZ91D magnesium alloy

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	Influence of phytic acid concentration on performance of phytic acid conversion coatings on the AZ91D magnesium alloy
	X. F. Cui; Y. Li; Q. F. Li; G. Jin; M. H. Ding; F. H. Wang
	2008
发表期刊	Materials Chemistry and Physics
ISSN	0254-0584
卷号	111 期号:2-3 页码:503-507
摘要	In this study, the phytic acid conversion coating, a new environmentally friendly chemical protective coating for magnesium alloys, was prepared. The influences of phytic acid concentration on the formation process, microstructure, chemical state and corrosion resistance of the conversion coatings on AZ91 D magnesium alloy were investigated by means of weight gain measurement, field-emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, potentiodynamic polarization method and electrochemical impedance spectroscopy (EIS), respectively. And the depth profile of all elements in the optimal conversion coatings was analyzed by auger electron spectroscopy (AES). The results show that the growth, microstructure, chemical state and corrosion resistance of the conversion coatings are all obviously affected by the phytic acid concentration. The concentration of 5gl(-1) corresponds to the maximum weight gain. The main elements of the coating are Mg, Al, O, P, and C, which are distributed gradually in depth. The functional groups of conversion coatings formed in higher concentration phytic acid solution are closer to the constituent of phytic acid than those formed in lower concentration phytic acid solution. The coatings formed in 1-5 gl(-1) are integrated and uniform. However, those formed in 20-50 gl(-1) have some micro-cracks on the (x phase. The coating formed in 5 gl(-1) has the best corrosion resistance, whose open circuit current density decreases about six orders than that of the untreated sample, although the coatings deposited in 1-20 gl(-1) can all improve the corrosion resistance of AZ91 D. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
部门归属	[cui, xiufang; li, qingfen; jin, guo; ding, minghui; wang, fuhui] harbin engn univ, sch mat sci & chem engn, harbin 150001, peoples r china. [cui, xiufang; li, ying; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;cui, xf (reprint author), harbin engn univ, sch mat sci & chem engn, 145 nantong st, harbin 150001, peoples r china;cuixf97721@yahoo.com.cn
关键词	Concentration Magnesium Alloys Phytic Acid Conversion Coatings Corrosion-resistance Chromatography Behavior Copper Mg
URL	查看原文
WOS记录号	WOS:000258964300058
引用统计	被引频次：121[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/321006/32702
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. F. Cui,Y. Li,Q. F. Li,et al. Influence of phytic acid concentration on performance of phytic acid conversion coatings on the AZ91D magnesium alloy[J]. Materials Chemistry and Physics,2008,111(2-3):503-507.
APA	X. F. Cui,Y. Li,Q. F. Li,G. Jin,M. H. Ding,&F. H. Wang.(2008).Influence of phytic acid concentration on performance of phytic acid conversion coatings on the AZ91D magnesium alloy.Materials Chemistry and Physics,111(2-3),503-507.
MLA	X. F. Cui,et al."Influence of phytic acid concentration on performance of phytic acid conversion coatings on the AZ91D magnesium alloy".Materials Chemistry and Physics 111.2-3(2008):503-507.