镁合金微弧氧化过程中参数对成膜效果的影响和优化

Effect of Micro-arc Oxide Coating Parameters and Optimization Method

研究了在镁合金微弧氧化过程中电解液浓度、电流密度、氧化时间等参数对生成膜性质的影响。发现在不同的电解液浓度、电流密度条件下,电压都具有峰值平台,但峰值的大小及持续时间随条件的改变而改变。若采用分阶段提升电流密度可使得在电压-时间曲线上获得多个峰值平台,同时控制氧化时间,从而能获得更好的膜层质量。

Micro-arc oxidation method was employed to deposit oxide film on the surface of magnesium alloy samples. The effects of some factors on the properties of the ceramic coating, such as electrolyte composition, electric density and oxidation time etc. were investigated. The results show that there is a flat peak that varies with the different conditions of oxidation. It is found that a few of flat peaks can be obtained if the electric current is raised step by step and thus a better coating can be produced by combining the control of oxidation time.