Fabrication and corrosion resistance of a hydrophobic micro-arc oxidation coating on AZ31 Mg alloy

被引：294
作者：
Cui, Xue-jun [1 ,2 ]
Lin, Xiu-zhou [1 ,2 ]
Liu, Chun-hai [1 ,2 ]
Yang, Rui-song [1 ,2 ]
Zheng, Xing-wen [1 ]
Gong, Min [1 ,2 ]
机构：
[1] Sichuan Univ Sci & Engn, Mat Corros & Protect Key Lab Sichuan Prov, Zigong 643000, Peoples R China
[2] Sichuan Univ Sci & Engn, Coll Mat & Chem Engn, Zigong 643000, Peoples R China
来源：
CORROSION SCIENCE | 2015年 / 90卷
关键词：
Alloy; Magnesium; Polarization; EIS; Anodic films; Oxide coatings; PLASMA ELECTROLYTIC OXIDATION; MAGNESIUM ALLOY; SUPERHYDROPHOBIC SURFACE; RECENT PROGRESS; PROTECTION; FACILE; FILM; MICROSTRUCTURE; ADDITIVES; SUBSTRATE;
D O I：
10.1016/j.corsci.2014.10.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A hydrophobic surface was fabricated through the micro-arc oxidation (MAO) and subsequent stearic acid surface modification of AZ31 Mg alloy, achieving a maximum water contact angle of 151.5 degrees after 10 h of modification. Through surface analyses and investigation into the corrosion behavior, this hydrophobicity is ascribed to a combination of the MAO coating's rough micro-pore structure and the formation of a stearic acid monolayer through bidentate bonding. The hydrophobic MAO coating effectively inhibits corrosion of the Mg alloy, especially pitting corrosion, and demonstrates that surface modification could further increase or accelerate the application of MAO treatment to Mg alloys. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：402 / 412
页数：11
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