Research Development of Anti-corrosion Surface Treatment for Magnesium Alloys

As one of the lightest engineering materials, magnesium alloy has been named the 21 century green structural metallic material and has extensive application prospect for its characteristics, such as high strength, specific rigidity, high damping ability, better casting property and so on. But the industry application of magnesium alloy is severely limited for its low corrosion resistance, so the preventive disposing on magnesium alloy's surface is very important. They were discussed in detail the current methods of anti-corrosion surface treatment for magnesium alloys in this paper, including chemical conversion, anodic oxidation, micro-arc oxidation, metallic coating, organic coating, PVD, ion implantation, laser surface modification. In the end, it was prospected the development trend of surface treatment for magnesium alloys in future, based on these methods.