期刊
CORROSION SCIENCE
卷 90, 期 -, 页码 402-412出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.10.041
关键词
Alloy; Magnesium; Polarization; EIS; Anodic films; Oxide coatings
资金
- Talent Introduction Funds of the Sichuan University of Science and Engineering [2014RC18]
- Opening Project of the Material Corrosion and Protection Key Laboratory of Sichuan Province [2013CL01]
- key project of the Sichuan Education Department [12ZA261]
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.
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