RESEARCH OF AN DIC OXIDFILM

GROWTH OF ANODIC OXID FILM AND CONSUMPTION OF AL. ANODE. (PART. I)

Abstract

In this paper, we report the growth of anodic oxid film and consumption of Al anode in anodizing process, and discuss on the practical meaning of the temperature of electrolytic liquid, and the density of current.
The result of experimsnt is as follows.
(1) We anodize Al sheet in sulphurie acid solution at 20-70°C liquid temperature. The weight of anodic oxid film increases at lower temperature of sulphuric acid solution, but decreases at higher temperature than 40°C. At lower temperature, Al anode is scarcely consumpted but oxid film grows steadily. At higher temperature, the consumption of Al anode is great and the growth of oxide film is negligiblc small.
(2) We measured the oxid film weight and consumption of anode in process of oxid film growing. The result shows that the ratio S/F quickly saturate after electrolysis starting.
(3) In anodizing process, it is economocal in power consumption to increase the current density.