A chrome-free conversion coating for magnesium-lithium alloy by a phosphate-permanganate solution

被引：114
|
作者：
Zhang, Hua [1 ]
Yao, Guangchun [1 ]
Wang, Shulan [2 ]
Liu, Yihan [1 ]
Luo, Hongjie [1 ]
机构：
[1] NE Univ, Sch Met & Mat, Shenyang 110004, Peoples R China
[2] NE Univ, Sch Sci, Shenyang 110004, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 09期
关键词：
magnesium-lithium alloys; chrome-free conversion coating; corrosion resistance; phosphate-permanganate;
D O I：
10.1016/j.surfcoat.2007.07.094
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A chrome-free conversion coating on magnesium-lithium alloy was obtained from a phosphate-permanganate solution. The morphology, the composition and the corrosion resistance of this coating were examined. The thin and non-penetrating cracked morphology with some deposits existed on the phosphate-permanganate conversion coating. The main elements of the conversion coating were Mg, O, K, P and Mn. The results of the electrochemical measurements and the immersion tests demonstrated that the corrosion resistance of the magnesium-lithium alloy has been improved by the phosphate-permanganate conversion treatment. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：1825 / 1830
页数：6
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