摘要：This research studied the mechanism of the corrosion resistance enhancement of artificially aged 7075 aluminium alloy using advanced Cs-corrected scanning transmission electron microscopy(STEM).The corrosion behaviors of artificially aged 7075 aluminium alloys in a 3.5 wt.%NaCl solution were investigated by impedance spectra,equivalent circuit analyses,polarization measurements and immersion *** results show that a longer aging treatment leads to better corrosion resistance,which can be attributed to the following microstructural features,as revealed by *** Cu segregation at grain boundaries under over-aged conditions helps retard intergranular *** Mg(Zn,Cu)_(2) precipitates formed on the surfaces of Al_(18)Mg_(3)(Cr,Mn)_(2) dispersoids effectively insulate the dispersoids as cathodes in corrosion,from the Al *** study demonstrates a potential strategy to design corrosion-resistant alloys achieved by proper alloying and subsequent aging.