Formation of phosphate/permanganate conversion coating on AZ31 magnesium alloy

被引：74

作者：

Lin, CS ^{[1
]}

Lee, CY

Li, WC

Chen, YS

Fang, GN

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

[2] Da Yeh Univ, Dept Mech & Automat Engn, Changhua 515, Taiwan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2006年 / 153卷 / 03期

关键词：

D O I：

10.1149/1.2164787

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The properties of conversion coating on magnesium can be closely related to its microstructure and composition. This study investigated the evolution and microstructure of phosphate/permanganate conversion coating on AZ31 magnesium alloy. Results show that increasing the solution temperature reduced the growth rate of the coating. The temperature effect lies in the different structure associated with the coating layer contacting the substrate: a porous layer mainly composed of magnesium, aluminum hydroxides/phosphate formed in the solution at 40 degrees C, while a compact magnesium oxide layer formed in the solution at 80 degrees C. The formation mechanism of phosphate/ permanganate coating was discussed in detail, with emphasis on the effect of the solution temperature. (c) 2006 The Electrochemical Society.

引用

页码：B90 / B96

页数：7

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