抄録
Densities and distributions of various elements in the crosssection of aluminum anodic oxide films were measured by electron probe micro-analyzer (EPMA).
The relation between the structure and coloring of the films was investigated with respect to the results of the above measurements.
The following conclusions were reached
1) It was found that aluminum was oxidized by oxygen by the measurements of densities and distributions of aluminum and oxygen in the films. However, these elements were not directly concerned with the coloring of the films.
2) Silicon and iron contained at radom in aluminum materials also existed in random distribution in the films.
Dark gray coloring of the films on 43 S-aluminum material prepared from sulfuric acid solution was considered to be derived from silicon in the material.
However, a thorough relation was not found between density and distribution of iron and coloring of the films in this experiment.
3) Main elements which had been contained in the electrolyte were found to be distributed in the films. These elements included were titanium, chromium, phosphorus, and sulfur. They did not adhere to the film surfaces, but would be present in the interior of the films.
The distribution of these films depended on the sort of films. The coloring of films would directly or indirectly be concerned with these elements.
