Abstract The high silicon cast aluminum alloy with copper content was hard anodized by DC overlapped pulse power supply.The effects of pulse amplitude on film properties were primarily investigated.

• 以直流叠加脉冲电源对含铜的高硅铸造铝合金进行硬质阳极氧化，研究了电源脉冲幅度对膜层性能的影响。