Abstract
Fundamentals and recent research development of the structure and growth mechanism of anodic oxide films formed on pure aluminum and aluminum alloys such as A5052 and A6061 were described with focusing on their gas emission property in use of vacuum chambers. Highest volume gas emitted from anodized aluminum surface is water vapor followed by oxygen in the second. Notable suppression of gas emission from aluminum alloy surface can be attained by giving porous/barrier composite anodizing films based on the decrease in defects formation in the films.
