Influence of Solution Composition on Formation of Golden Yellow Rare Earth Conversion Film on Magnesium Alloy

被引：1

作者：

于升学 ^{[1
]}

张占伟 ^{[2
]}

陈玲 ^{[3
]}

韩婧 ^{[1
]}

机构：

[1] Department of Applied Chemistry ,Yanshan University, Qinhuangdao , China

[2] Special Process Factory of Inner Mongolia North Heavy Industries Group Limited Corporation, Baotou , China,Department of Applied Chemistry ,Yanshan University, Qinhuangdao , China

[3] Special Process Factory of Inner Mongolia North Heavy Industries Group Limited Corporation, Baotou , China

来源：

Journal of Rare Earths | 2005年 / S1期

关键词：

magnesium alloy; chemical conversion film; rare earths;

D O I：

暂无

中图分类号：

TG132 [特种物理性质合金];

学科分类号：

080502 ;

摘要：

Cerium sulfate was used as main composite in solution to prepare golden yellow chemical conversion film on magnesium alloy. The influence of solution composition on the surface morphology of golden yellow rare earth conversion film on magnesium alloy was studied by means of SEM; potential-time curves in the formation process of rare earth conversion film and the anti-corrosion property of the conversion film were tested through ECT. The results show that, when there is no other component in the solution besides cerium sulfate, yellow film can be obtained on magnesium alloy, but there are some dusts on the film surface and the solution is not stable. The stability of cerium sulfate solution increases with adding hydrogen peroxide, while the film is thin and its color turn light. After adding combination additive containing Al 3+, smooth and compact golden yellow film was obtained on magnesium alloy. The polarization curves tested in 3.5% NaCl solution show that the anti-corrosion property of magnesium alloy is increased obviously by rare earth conversion film, and the film has self-repairing capability in the corrosion process.

引用

页码：255 / 258

页数：4

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