The results shows that the micro-hardness and film thickness of aluminum alloy 2A12 in low sulfuric acid solution are larger than these in high sulfuric acid solution.

• 结果表明：2A12合金在低硫酸浓度中进行硬质阳极氧化，氧化膜的硬度和膜层厚度较在高浓度硫酸溶液中的高；