3005铝合金常温快速硬质阳极氧化工艺研究

Study on rapid hard anodization process of 3005 aluminum alloy at room temperature

研究了3005铝合金在以磺基水杨酸为主盐的复合电解液中的常温快速硬质阳极氧化。结果表明,当电解液组成为磺基水杨酸40～50g/L,添加剂A25～40g/L,添加剂B10～25g/L,浓硫酸2～4mL/L时,控制电流密度2.5～5.0A/dm2和溶液温度10～25°C,可在3005铝合金表面形成一层黑色的硬质阳极氧化膜,膜层具有优异的物理化学性能和良好的表面装饰性能。

The room-temperature rapid hard anodization for 3005 aluminum was studied in a mixed electrolyte based on sulfosalicylic acid. The results showed that a black hard anodizing film can be formed on 3005 aluminum alloy surface from a bath containing sulfosalicylic acid 40-50 g/L, additive A 25-40 g/L, additive B 10-25 g/L and concentrated sulfuric acid 2-4 mL/L at 10-25℃ and current density 2.5-5.0 A/dm^2. The anodizing film has good physicochemical and decorative properties.