期刊
APPLIED SURFACE SCIENCE
卷 256, 期 22, 页码 6667-6672出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.04.067
关键词
Mg alloy; Plasma electrolytic oxidation; Corrosion; Surface roughness
类别
资金
- Korea Science and Engineering Foundation [2009-0079807]
- Center for Advanced Materials Processing of the 21st Century Frontier RD Program
The influence of the surface roughness of Mg alloys on the electrical properties and corrosion resistance of oxide layers obtained by plasma electrolytic oxidation (PEO) were studied. The leakage current in the insulating oxide layer was enhanced by increasing the surface roughness, which is a favorable characteristic for the material when applied to hand-held electronic devices. The variation of corrosion resistance with surface roughness was also investigated. The corrosion resistance was degraded by the increasing surface roughness, which was confirmed with DC polarization and impedance spectroscopy. Pitting corrosion on the passive oxide layer was also analyzed with a salt spray test, which showed that the number of pits was not affected by the surface roughness when the spray time reached 96 h. (C) 2010 Elsevier B.V. All rights reserved.
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