The microstructure of micro-airc oxidization coatings on MBS magnesium alloy under different working voltages (102 -200V) was studied by SEM-EDS and XRD. The corrosion resistance of these magnesium alloy micro-arc oxidation coatings was investigated by electrochemistry test. The results show that the working voltage affects the microstructure and composition of oxidation coating, which directly affects the corrosion resistance of magnesium alloy. The oxidation coating was composed of (-MgF2, MgO, Mg2 SiO4 a...