Effects of Na2SiO3 on anodization of Mg-Al-Zn alloy in 3 M KOH solution

被引：86

作者：

Fukuda, H

Matsumoto, Y

机构：

[1] Kyushu Nogeden Co Ltd, Kumamoto 8610115, Japan

[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan

来源：

CORROSION SCIENCE | 2004年 / 46卷 / 09期

关键词：

magnesium alloy; anodic films; chromium-free solution; fluorine-free solution;

D O I：

10.1016/j.corsci.2004.02.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The anodic behavior of Mg-Al-Zn alloy (AZ91D) under low potential electrolysis in 3 M KOH solutions was studied with and without addition of 0.5-5 M Na2SiO3. Anodic films incorporating silicon were formed during electrolysis, and the films formed under constant potential electrolysis at 4 V in 3 M KOH solution with Na2SiO3 were uniform and thicker than the films formed without Na2SiO3. A few at% of silicon was present as Mg2SiO4 in the films, although the main compound was Mg(OH)(2). The corrosion resistance of the films formed in solutions with Na2SiO3 increased in an anodic polarization test in 0.1 M KCl solution. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2135 / 2142

页数：8

共 11 条

[1]

EMELY EF, 1966, PRINCIPLE MAGNESIUM

[2]

EVONGLIDE HA, 1951, MET FINISH, V49, P56

[3]

FUKUDA H, 2001, ABSTRACTS FRONTIERS, P186

[4]

*JEOL CO LTD, 1991, HDB XRAY PHOT SPECTR