Study on the anodic film formation process of AZ91D magnesium alloy

被引：94
|
作者：
Zhang, L. J.
Fan, J. J.
Zhang, Z. [1 ]
Cao, F. H.
Zhang, J. Q.
Cao, C. N.
机构：
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Dept Chem Engn, Hangzhou 310027, Peoples R China
[3] Chinese Acad Sci, State Key Lab Corros & Protect Met, Inst Met Res, Shenyang 110016, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2007年 / 52卷 / 17期
基金：
中国国家自然科学基金;
关键词：
AZ91D magnesium; anodic film; nucleation and growth; EIS; current-time transients;
D O I：
10.1016/j.electacta.2006.12.083
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The formation of anodic film of AZ91D magnesium alloy has been investigated by means of electrochemical impedance spectroscopy (EIS), cyclic voltammetry, anodic polarization curve, current-time transients and SEM technique. The results show that, under our experimental conditions, the formation of AZ91D anodic film follows the mechanism of 3D nucleation with diffusion controlled growth. With the increase of applied anodizing potential, the nucleation type of anodic film changes from progressive to instantaneous. The results also show that the initially formed anodized film is threadlike and porous, and high potential is essential for the formation of good anodic film with excellent properties. (c) 2007 Published by Elsevier Ltd.
引用
收藏
页码：5325 / 5333
页数：9
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