The　effect　of　stabilization　annealing　on　the　long-term　corrosion　resistance　and　microstructure　in　Er　and　Zr　contained　5083　aluminum　alloy　was　studied　using　the　nitric　acid　mass　loss　test　(NAMLT),　exfoliation　corrosion　(EC)　test,　accelerated　sensitization　annealing　(ASA)　at　175　degrees　C　and　transmission　electronic　microscopy　(TEM)　observation.　The　results　showed　that　the　alloy　in　cold　rolling　state　sensitized　severely　after　the　ASA.　The　long-term　IGC　and　EC　resistances　improved　significantly　through　stabilization　treatment　at　220　degrees　C.　The　longer　stabilization　time,　the　better　long　term　corrosion　resistance.　The　precipitation　evolution　of　the　alloy　during　the　ASA　in　cold　rolling　state　and　stabilization　state　were　analyzed　by　TEM.　The　results　showed　that　the　beta　precipitates　were　not　found　at　cold　rolling　state,　but　formed　continuously　along　grain　boundary　during　ASA　at　175　degrees　C　for　2　h.　After　12　h　stabilization　treatment　from　the　cold　rolling　sample,　beta　precipitates　were　isolated　at　the　triple　junctions　and　Al-6(Mn,Fe)　phase　boundaries.　During　the　further　ASA　at　175　degrees　C　for　2　h,　beta　phases　formed　sparsely　and　separately　at　grain　boundaries.　The　addition　of　stabilization　treatment　led　to　the　morphology　change　of　beta　phases　during　ASA,　resulting　in　the　improvement　of　long-term　IGC　resistance.　Its　mechanism　was　discussed　thermodynamically　and　kinetically.