Recent advances in micro-arc oxidation of die cast magnesium alloy AZ91 are presented.Its affecting factors of properties of micro-arc oxidation coating of die cast magnesium alloy AZ91 oxidized in different constituents of electrolyte including phosphate electrolyte
silicate solutions
aluminate system
and composite electrolyte are mainly discussed.Finally
the ideas about the research of micro-arc oxidation of die cast magnesium alloy AZ91 are summarized.