Effect of current ratio on plasma electrolytic oxide coatings on Mg-Al alloy
- Authors
- Chang, S.-Y.; Kim, Y.-L.; Song, B.-H.; Lee, J.-H.
- Issue Date
- 2007
- Publisher
- Trans Tech Publications Ltd
- Keywords
- Corrosion resistance; Current ratio; Hardness; Mg-Al; Plasma electrolytic oxidation; Thickness; Wear resistance
- Citation
- Solid State Phenomena, v.124-126, no.PART 1, pp.767 - 770
- Journal Title
- Solid State Phenomena
- Volume
- 124-126
- Number
- PART 1
- Start Page
- 767
- End Page
- 770
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/24196
- DOI
- 10.4028/3-908451-31-0.767
- ISSN
- 1012-0394
- Abstract
- Ceramic coatings were synthesized on pure Mg and binary Mg-7.1wt%Al alloy by plasma electrolytic oxidation (PEO) technique, and the effect of current ratio, C2/C1, ranging from 0.2 to 0.85 on their mechanical and electrochemical properties was investigated. As the C2/C1 ratio increased, the thickness of the coating layer increased, while surface roughness was almost unchanged. The hardness and wear resistance had a marked tendency to increase with increasing C2/C1 ratio and Mg-Al alloy showed higher hardness and wear resistance at all C2/C1 ratios compared to pure Mg. The weight loss of the pure Mg and Mg-Al alloy in 3.5%NaCl solution was reduced by coatings. However, it had no dependence on the C2/C1 ratio. The wear resistance of the coated Mg-Al alloy was better than that of the coated pure Mg.
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Collections - College of Engineering > Materials Science and Engineering Major > 1. Journal Articles
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