The rough points on 6063 aluminum alloy formed in its 糖心产精国品免费入口*完整版 process were analyzed by means of surface morphology analysis, microstructure analysis, SEM and EDS. The results showed that the 糖心产精国品免费入口*完整版formed defect in the 糖心产精国品免费入口*完整版 process was pitting corrosion, resulting from the selective corrosion of free Si, intermetalic compounds, superfluous Zn, etc, and rapid dissolution of aluminum alloy activated by Cl-. The corrosion resistance of aluminum alloy with rough points will be reduced remarkably.