镁合金阳极氧化膜的生长动力学过程

Growth Dynamics Process of Anodic Film Formed on Magnesium Alloy

阳极氧化是镁合金的重要防腐表面处理技术,但目前对镁合金阳极氧化成膜的形成机制还不十分清楚。本工作从成膜过程、微观形貌、组分、元素的传质行为、合金相对成膜的影响、物理生长模型等方面综述了镁合金阳极氧化成膜的生长动力学过程,提出了镁合金阳极氧化有待深入研究的方向。这将有利于掌握镁合金阳极氧化成膜机制,改进其阳极氧化工艺,扩大镁合金的实际应用。

Anodizing has become an important anticorrosive surface treatment technique of magnesium alloy, but the mechanism of anodic film formed on magnesium alloy is not understood fully. Several aspects were summarized up about the formation dynamics process of anodic film, including formation process, microstructure, composition, diffusion behavior of elements, the influence of alloy phase on formation of the film and the physical model. Finally, several important research problems of anodic film on Mg alloy were listed. It will benefit mastering the formation mechanism, improving the anodizing technology and enlarging the practical application.