As world energy and resources of the increasing tension,call for energy conservation and weight reduction, fall energy, durability and environmental protection are becoming higher and higher, light aluminium alloy of magnesium metal has become more extensive scope of application,but the lower hardness, prone to erosion and anyway, it quickly becomes visible. Microarc oxidation (MAO) is an advanced technique of processing material by means of high energy density. MAO coatings of aluminium alloy have intensiv...