Whether or not sulfuric acid concentration is high or low, sulfuric acid solution, bath temperature and current density affect the micro-hardness and film thickness of aluminum alloy 2A12.

• 无论是硫酸溶液浓度高低，硫酸溶液浓度、槽液温度、氧化电流密度等均影响2A12铝合金硬质阳极氧化膜的硬度和膜层厚度。