Corr）均降低，同時(shí)加劇了表面點(diǎn)蝕和晶間腐蝕程度。2A97-T3合金通過(guò)進(jìn)行固溶和雙級(jí)人工時(shí)效處理的共同作用得到2A97-T6合金，此時(shí)T1相數(shù)量大大增加且分布更加均勻。因此，熱處理工藝降低了2A97鋁合金的腐蝕電位，導(dǎo)致2A97-T6合金的耐腐蝕性能略弱于2A97-T3合金。晶間θ相的解體誘導(dǎo)了2A97-T3合金的剝落腐蝕形貌，而2A97-T6合金的點(diǎn)蝕形貌是由晶內(nèi)T1相的溶解造成的。;The corrosion resistance of 2A97-T3 and 2A97-T6 Al-Cu-Li alloys was studied by the electrochemical method through potentiodynamic polarization curves. The typical third generation 2060-T8, 2099-T83, and 2024-T4 alloys were used as reference for comparison. Through the analysis of electrochemical parameters and corrosion morphology, the results reveal that the corrosion resistance of the alloys in NaCl solution of different concentrations is as follows: 2A97-T3>2A97-T6>2024-T4>2060-T8>2099-T83. With increasing the concentration of NaCl solution, the corrosion potential (ECorr) of all alloys is decreased. Moreover, the surface pitting and intergranular corrosion become severe. The T1 phase greatly increases with more uniform distribution in 2A97-T6 alloy, which is obtained from the 2A97-T3 alloy after the solid solution coupled with double-stage artificial aging treatment. Consequently, the heat treatment process reduces the corrosion potential of 2A97-T6 Al alloy, which leads to the slightly weaker corrosion resistance of 2A97-T6 Al alloy than that of 2A97-T3 alloy. The disintegration of the intergranular θ phase induces the exfoliation corrosion morphology of 2A97-T3 alloy, and the pitting morphology of 2A97-T6 alloy is caused by the dissolution of intragranular T1 phase."/>