Although the microarc oxidation (MAO) technique can significantly improve the properties of metals, the numerous variables involved in the preparation of microarc oxidation coatings lead to inconsistent performance. In this study, MAO coatings were prepared using single and dual current methods with different current parameters. The effect of these methods on the coating properties was investigated. The results show that the coatings prepared by the reduced current method in dual current mode have excellent wear and corrosion resistance. The article explains the mechanism of action of this method in detail, which provides new ideas and methods to improve the performance of MAO coatings in a simple and effective way.

Changkai Wang ^a, Honghua Hu ^b, Shan Du ^c, Bo Cheng ^a, Yanyan Pan ^a and Hailin Lu ^{a, *}. Influence of the Dual-Current Method on the Properties and Growth Mechanisms of Micro-Arc Oxidation Coatings [J]. Materials Chemistry and Physics (Accepted, Impact Factor: 4.3, CAS III).

Fig. 1 Schematic diagram of the discharge and reaction during the growth of MAO coatings

Fig. 2 Surface morphology of the coating