Constant voltage anodizing of Mg-Al alloys in KOH-Al(OH)3 solutions

被引：86

作者：

Khaselev, O ^{[1
]}

Yahalom, J ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Mat Engn, IL-32000 Haifa, Israel

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1998年 / 145卷 / 01期

关键词：

D O I：

10.1149/1.1838234

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

Constant voltage anodizing of binary Mg Al alloys containing 2, 5, 8, and 12% of aluminum was studied. Anodizing was conducted in a bath containing 3 M KOH + 0.6 M KF + 0.21 M Na3PO4 with additions of 0.013, 0.064, 0.13, and 0.4 M of Al(OH)(3). A thin amorphous film was formed during the first stage of anodizing. Prolonged anodizing caused local breakdown and crystallization of the initially formed anodic films. The chemical composition of the newly formed crystalline film was determined. The elements in the film were mainly magnesium, aluminum, and oxygen. Aluminum penetrated into the film both from the electrolyte and from the Mg Al alloy substrate. The phase composition of the anodic films was found to be a mixture of MgO and MgAl2O4.

引用

页码：190 / 193

页数：4