Due　to　their　high　specific　strength　and　low　density,　7075　Al　alloys　are　widely　used　in　aerospace　applications.　However,　Al　alloys　are　prone　to　corrosion　and　deterioration,　and　the　service　life　depends　on　their　corrosion　resistance.　To　investigate　the　corrosion　and　strengthening　mechanisms　of　the　7075　Al　alloy　subjected　to　cold　rolling,　x-ray　diffraction,　scanning　electron　microscopy　and　transmission　electron　microscopy　were　used　to　characterize　the　sample　microstructure.　Compared　to　the　homogenized　samples,　the　ultimate　tensile　strength　of　a　cold-rolled　sample　increased　from　235　+/-　4　MPa　to　347　+/-　3　MPa　when　the　thickness　reduction　increased　to　50%.　The　yield　strength　approached　305　+/-　0.4　MPa,　and　the　tensile　ductility　decreased　up　to　62.9%.　The　cold-rolling　process　resulted　in　a　significant　increase　in　dislocation　density　and　a　reduction　in　grain　size.　The　increased　density　of　grain　boundaries　and　the　fragmentation　of　the　precipitates　led　to　a　reduction　in　galvanic　coupling　with　the　Al　matrix,　resulting　in　the　improved　corrosion　resistance　of　the　7075　Al　alloy.　This　study　provides　a　suitable　approach　to　enhance　both　the　mechanical　properties　and　corrosion　resistance　of　Al　alloys.