The growth process of micro-arc oxidation film on magnesium alloys and the influencing factors were discussed.It was indicated that the processbelongs to the submonolayer growth,the film is growing and forming by the end of a cyclic process “film forming breakdown melting sintering reforming……”.The film formed in the early stage is more compact than in the later stage.The loose layer is formed mainly in the later growth stage.The relations between the film-forming voltage,current,electrolyte system and film...