Surface modification of ACM522 magnesium alloy by plasma electrolytic oxidation in phosphate electrolyte

被引：75
|
作者：
Yagi, Shunsuke [1 ]
Sengoku, Akihiro [2 ]
Kubota, Kohei [3 ]
Matsubara, Eiichiro [2 ]
机构：
[1] Osaka Prefecture Univ, Nanosci & Nanotechnol Res Ctr, Osaka 5998570, Japan
[2] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan
[3] Alconix Diecast Suzhou Co Ltd, Suzhou 215164, Jiangsu, Peoples R China
来源：
CORROSION SCIENCE | 2012年 / 57卷
基金：
日本学术振兴会;
关键词：
Magnesium; Alloy; EIS; Polarization; Anodic films; IMPEDANCE PLANE DISPLAYS; CORROSION BEHAVIOR; STABILITY CONDITIONS; STEADY-STATE; PEO COATINGS; ANODIC FILMS; SILICATE; SPECTROSCOPY;
D O I：
10.1016/j.corsci.2011.12.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Plasma electrolytic oxidation (PEO) on a newly designed ACM522 magnesium die-casting alloy has been conducted in an aqueous phosphate solution and the morphology and corrosion resistance of the PEO films were investigated in detail. By covering the whole surface of the substrate with the PEO film, the corrosion resistance was significantly improved: the modified surface endured a salt spray test for 168 h. It was also clarified that traces of local breakdown caused by excessive PEO can be a cause of pitting corrosion, resulting in significant decline in corrosion resistance with PEO time. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：74 / 80
页数：7
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