| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5461132 | Journal of Alloys and Compounds | 2017 | 32 Pages |
Abstract
The corrosion resistance of aluminum and its alloys requires improvement in some applications. In this work, a 20 μm thick compact alumina coating doping Fe and P is obtained on the substrate of LY12 Al alloy by combining micro-arc oxidation (MAO) and phosphating to improve the corrosion resistance. The reaction mechanism is investigated and proposed. The coating shows a relatively small surface roughness (Ra = 0.5 μm) and a high Vickers hardness (1200 HV). The corrosion resistance is evaluated by the salt spraying test and Tafel polarization and a lifetime of up to 1800 h and a passivation potential of above 10 V are observed.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shunping Ji, Yuchang Weng, Zhongzhen Wu, Zhengyong Ma, Xiubo Tian, Ricky K.Y. Fu, Hai Lin, Guosong Wu, Paul K. Chu, Feng Pan,