Different coloured finishes could be obtained on anodized aluminium by AC electrolytically colouring anodized Al in acidic solution containing Ni~(2+) and Cu~(2+) at different time intervals.

• 铝阳极氧化后,在含有Ni~(2+)和Cu~(2+)的溶液中,用交流电电解着色不同时间,可获得不同的色彩。