Magnesium alloys has been wildly applied in the fields of aerospace、electronic information、automobile、and home appliances due to their low density、high specific strength、high specific stiffness、good damping capacity、castability and mechanical properties. However, its relatively lower corrosion resistance behavior has severely limited its further development and application. In this paper, the effect of Mn addition on microstructure and corrosion resistance property of AZ91 alloys was investigated to find th...