Characterization of the chemical conversion films that form on Mg-Al alloy in colloidal silica solution

被引：18
作者：
Kim, SJ
Zhou, Y
Ichino, R
Okido, M
Tanikawa, S
机构：
[1] Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Nakanihon Die Casting Co Ltd, Kakamihara 5040957, Japan
来源：
METALS AND MATERIALS INTERNATIONAL | 2003年 / 9卷 / 02期
基金：
日本学术振兴会;
关键词：
chemical conversion treatment; Mg-Al alloy; colloidal silica coating; corrosion resistance;
D O I：
10.1007/BF03027279
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chemical conversion treatment of Mg-Al alloy (AZ91) using colloidal silica as an alternative to chromate conversion was investigated as a function of solution pH, temperature, solution conditions, and treatment time. The solution used for the colloidal silica coating consisted of colloidal silica, titanium sulfate, and cobalt ions to maintain good anti-corrosion and adhesion properties. Adding CoSO4 to the colloidal silica solution enhanced the adhesion force between the silica film and magnesium substrate. The optimum conditions for the chemical conversion treatment solution were pH 2, 90-sec treatment, and 25 degreesC.
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页码：207 / 213
页数：7
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