Time dependence of growth and crystallization of anodic titanium oxide films in potentiostatic mode

摘要

The influence of anodizing time on formation and crystallization of potentiostatically formed titanium oxide films is studied both at "low" (10 V) and "high" (30 V) applied potentials. It is revealed that prolonging the anodizing time is beneficial for the growth and crystallization of titania anodic films, especially at low applied voltages. The titanium anodization process follows two distinct stages. In the film formation stage, the film thickness and crystallinity increase fast. While in the film aging stage, the thickness and crystallinity of titanium oxide films only slightly change with anodizing time due to the enhancement of film dissolution rate.