By combining anodizing with micro-arc oxidation, which requires no pretreatment, and electro-phoresis coating with static protective properties, a high-performance, multi-functional ceramic organic composite film is prepared on the surface of magnesium alloys. The performance of the composite film is notably superior to that of single micro-arc oxidation or traditional coating processes.

The micro-arc electro泳 composite treatment technology boasts advantages such as simple process, environmental protection, zero emissions, high efficiency, excellent comprehensive performance of the film layer, and strong adaptability to materials, making it an industry-recognized environmentally friendly surface treatment technology for magnesium alloys.

Micro-arc electro泳 composite treated magnesium alloy cross-sectional micrograph shows a smooth, fine, dense, and glossy organic film surface without flow marks, pores, or burrs; the interface between the micro-arc oxidation ceramic layer and the organic layer provides a porous structure for the organic layer, with the organic film embedded in the ceramic layer's micropores, and the ceramic layer and electro泳 film layer exhibit mechanical interlocking strength.

The mechanical bonding between the micro-arc electro泳 coatings ensures adhesion levels of ≤1 for the composite layer. Additionally, the uniformly dense organic coating seals the micro-arc oxidation ceramic layer, significantly enhancing the corrosion resistance of the magnesium alloy, achieving over 2000 hours in salt spray tests.