Formation of Ti-Si composite oxide films on Mg-Al-Zn alloy by electrophoretic deposition and anodization

被引：17
作者：
Fukuda, H
Matsumoto, Y
机构：
[1] Kyushu Nogeden Co Ltd, Proc Engn Grp, Ueki, Kumamoto 8610115, Japan
[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan
来源：
ELECTROCHIMICA ACTA | 2005年 / 50卷 / 27期
关键词：
magnesium alloy; corrosion resistance; Ti-Si composite oxide films; chromium-free solution; fluorine-free solution;
D O I：
10.1016/j.electacta.2005.03.010
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
TiO2 or SiO2 nanoparticles, dispersed in an acetone solvent containing iodine were deposited on Mg-Al-Zn alloy by electrophoretic deposition (EPD). Subsequently, the composite oxide films were formed on the substrate by anodization in KOH-Na2SiO3 aqueous solutions containing TiO2 or SiO2 nanoparticles. The films formed by EPD were improved binding with the substrate by anodization under high voltages with sparking, and then the anodic films consisted of Si-Mg or Ti-Si-Mg composite oxides. The film thicknesses of TiO2 and SiO2 on the alloy increased with anodization time. In polarization tests, the films anodized under high voltages with sparking in the alkaline solutions had high corrosion resistance. Thus, the composite oxide films formed in the present method were successful in providing corrosion resistance to Mg alloy. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5329 / 5333
页数：5
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