Effects of electric parameters on properties of anodic coatings formed on magnesium alloys

被引：98
作者：
Zhanga, R. F. [1 ,2 ]
Shan, D. Y. [1 ]
Chen, R. S. [1 ]
Han, E. H. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Environm Corros Ctr, Shenyang 110016, Peoples R China
[2] Jiangxi Sci & Technol Normal Univ, Jiangxi Key Lab Surface Engn, Nanchang 330013, Jiangxi, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 107卷 / 2-3期
关键词：
magnesium alloy; micro-arc oxidation; property; electric parameters;
D O I：
10.1016/j.matchemphys.2007.07.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of electric parameters including frequency, duty cycle, current density and final voltage on properties of anodic coatings formed on AZ91HP magnesium alloys were systematically investigated using the orthogonal experiment of four factors with three levels. The effect order of factors on the corrosion resistance of anodized Mg alloys was ranked as final voltage > frequency > duty cycle > current density, while the sequence on the coating thickness was final voltage > current density > duty cycle > frequency. The porosity of anodic coatings was increased with an increase of final voltage, but decreased with an improvement of frequency. The electric parameters applied affected the corrosion resistance mainly by influencing the coating thickness and surface morphology. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：356 / 363
页数：8
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