Abstract: The corrosion behavior of six common used aluminum alloys ZL201A, ZL301A, ZL401A, 2A11, 3A21 and6061 were studied systematically. The corrosion resistance mechanism of the samples in simulated flue gas condensate（excluding Cl-and including Cl-） was investigated by polarization curves and laser confocal morphology. The results indicate that all aluminum alloys show excellent corrosion resistance, in which the soaking corrosion weight loss of ZL301A and 3A21is least and therefore the corrosion resistance is best. Under the condition of Cl-corrosion solution, the corrosion resistance of each sample decreases and the pit depth increases, and ZL301A, 2A11 and 3A21 alloys have excellent corrosion resistance.