Kinetics of growth of anodic oxide films on titanium

Abstract

Steady state kinetic data for the formation of anodic oxide films on titanium in mixed solution of aqueous electrolyte (disodium hydrogen phosphate) with diethylene glycol at different current density sets and at different temperatures have been obtained. Various parameters of anodic oxidation have been evaluated using Dewald's theory. The entrance barrier energy has been found less than the corresponding diffusion barrier energy and this suggests that the rate-controlling step in the kinetics of growth of anodic film is the ionic movement across the film and not at the metal/oxide interface.