Conversion coating treatment for AZ31 magnesium alloys by a phytic acid bath

被引：0
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作者：
Liang, C.H. [1 ]
Zheng, R.F. [2 ]
Huang, N.B. [1 ]
Xu, L.S. [3 ]
机构：
[1] Department of Materials Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China
[2] School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
[3] Sunrise Power Co. Ltd., Dalian 116085, China
来源：
Journal of Applied Electrochemistry | 2009年 / 39卷 / 10期
关键词：
A phytic acid chemical conversion bath was applied to a sample of AZ31 magnesium alloy in this study; a transparent conversion coating formed subsequently on the sample surface. The test results of this coating with a scanning electron microscope (SEM) showed that there exist compact coatings on the surface of treated magnesium alloy. With the analyses of electronic probe microscopy (EPMA) and IR spectrum; a further study of this coating indicated that the coating was mainly composed of phytate and oxide or hydroxid. Furthermore; The electrochemical tests showed that the phytic acid bath conversion treatment enhanced the corrosion resistance of AZ31 magnesium alloys. The optimal pH of the phytic acid bath was 9.00-10.00. © 2009 Springer Science+Business Media B.V;
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页码：1857 / 1862
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