Mechanical　properties　and　corrosion　resistance　of　erbium　-containing　high　magnesium　aluminum　alloy　sheet　were　studied　under　different　stabilization　annealing　process,　and　the　stabilization　annealing　process　was　optimized　to　obtain　the　stabilization　process　window　of　erbium　-containing　high　magnesium　aluminum　alloy　sheet.　The　results　show　that　the　corrosion　resistance　of　the　hot　extruded　erbium-containing　high　magnesium　aluminum　alloy　annealed　at　260-270　°C　reaches　the　insensitive　zone　with　the　extension　of　the　stabilization　annealing　time.　After　sensitization　treatment,　the　corrosion　resistance　of　the　alloy　deteriorates　to　the　insensitive　zone　and　its　corrosion　resistance　is　improved.　Combined　with　the　observation　and　analysis　of　the　corrosion　depth　after　sensitization,　the　results　show　that　the　alloy　has　good　corrosion　resistance　and　mechanical　properties　under　the　optimized　process　of　annealing　at　260　°C　for　16-24　h.　The　microstructure　of　the　optimized　alloy　is　analyzed　by　means　of　transmission　electron　microscope　(TEM).　No　evidence　of　p　phase　precipitation　continuously　at　grain　boundary　is　observed,　which　proved　that　the　alloy　can　offer　good　corrosion　resistance.　©　2022　Chinese　Mechanical　Engineering　Society　of　Heat　Treatment.　All　rights　reserved.