Transient Behaviors of Anodizing Titanium Analyzed by an Ion-Hopping Conduction Model

An interpretation of the potential−time curves for the anodic oxidation of titanium measured under a fixed current density is presented on the basis of an ion-hopping conduction model proposed by Cabrera and Mott (Cabrera, N.; Mott, N. F. Rep. Prog. Phys. 1948 − 49, 12, 163). The transient potential−time curves exhibit three continuous growth regions that correspond to the following transport modes related to the growth of the anodic oxidized titanium layers: ion diffusion in the titanium oxide layers, ion migration by the high electric field, and the dielectric breakdown in the titanium oxide layers. The analysis based on the ion-hopping conduction model extended to this study allows us to determine fundamental parameters in anodic oxidation.