The　influence　of　aging　treatment　on　the　intergranular　corrosion　and　exfoliation　corrosion　susceptibility　of　the　high　Zn　content　super-high　strength　Al　alloy　was　studied　using　optical　microscopy　(OM),　scanning　electron　microscopy　(SEM)　and　transmission　election　microscopy　(TEM).　The　results　show　that　the　two-stage　over-aging　treatment　and　retrogression　and　re-aging　treatment　can　improve　the　corrosion　resistance　of　the　super-high　strength　Al　alloy,　which　are　in　accord　with　the　results　of　polarization　tests　in　3.5%NaCl　(mass　fraction)　solution.　TEM　observation　shows　that　the　size　and　morphology　of　precipitates　at　grain　boundaries　are　the　key　factors　responsible　to　the　corrosion　behavior　of　the　alloy.　After　the　two-stage　over-aging　treatment　and　retrogression　and　re-aging　treatment,　the　precipitates　at　grain　boundaries　are　coarse　and　discontinuous,　which　decreases　the　corrosion　susceptibility　of　the　alloy.　Moreover,　there　are　three　stages　of　the　corrosion　development　of　the　super-high　strength　Al　alloy　studied　in　Cl--containing　media　as　pitting,　intergranular　corrosion　and　exfoliation　corrosion.