| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7990643 | Journal of Alloys and Compounds | 2018 | 11 Pages |
Abstract
The presence of second phase Mg2Ca has remarkable impacts on the formation and degradation of MAO coating. Microstructure, formation and degradation behaviors of substrate and MAO coating were performed. Results revealed that pitting and filiform corrosion occurred on bare Mg-1Li-1Ca alloy. MAO coating significantly improved the corrosion resistance of alloy. The roles of Mg2Ca on the formation and degradation mechanisms of MAO coating were discussed. Micro-arc oxidation for the Mg-Li-Ca alloy initiated at α-Mg phase with depleted Ca content. The growth rate of coating on α-Mg phase is faster than that of GBs/Mg2Ca. The MAO coating began to degrade from intermetallic compound Mg2Ca, then it underwent the attack from the solution and stress concentration caused by corrosion products.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zi-You Ding, Lan-Yue Cui, Xiao-Bo Chen, Rong-Chang Zeng, Shao-Kang Guan, Shuo-Qi Li, Fen Zhang, Yu-Hong Zou, Qing-Yun Liu,