Abstract
An experimental study was performed to understand the effect of anodic oxide film on fatigue behaviour of wrought magnesium alloys in laboratory air and demineralized water. Two different films, Mg-Hard and Mg-Light, were evaluated. In laboratory air, the fatigue strength of the anodized specimens with Mg-Hard was nearly the same as that of the bare specimens, while the anodized specimens with Mg-Light exhibited higher fatigue strength than the bare specimens. In demineralized water, the fatigue strengths of both anodized specimens were the same as those of the bare specimens, indicating no improvement of corrosion fatigue strength by the anodic oxide films. This was because pores and crackings preexisted within the films acted as penetration path of the solution, thus similar corrosion fatigue process to the bare specimens took place underneath the films.
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