The Study on the Deposition Efficiency of Microarc Oxidation on Aluminum Alloy

With excellent wear resistance and corrosion resistance of films, simple procedures, high production efficiency and being environmentally friendly, micro-arc oxidation has become a novel technique to produce ceramic coatings on the surfaces of light metals such as aluminum and its alloys. In order to decrease the electric power consumption during the process, we put forward a improved technique of micro-arc oxidation, and introduce its technical properties and treatment effects on the surfaces of aluminum. The experimental results show that the properties, such as phase structure, thickness, roughness and hardness of the ceramic coating prepared by improved micro-arc oxidation are similar to those prepared by traditional micro-arc oxidation. The micro-arc oxidation with higher deposition efficiency will be an important research direction in the future.