Components of the Cold Sealed Films on Aluminium Anodired in Sulphuric Acid

The micro Components formed anodic films on Al were studied by ultrathin section technology, TEM, SEM etc. The results show that after 4 min of cold sealing, Ni(as a sealing agent) can be found near the outer layer, surface layer and the deep place of the anodic films. Its relative content increases to 9.244%. The content of Tin (as a coloring agent) can reach to 20.42% in the deep places of the films, while the content of S in the same place decreases from about 5% to 3%. After 100 min of cold sealing, the films on Al are still amorphous substance.