KINETICS OF GROWTH OF ANODIC OXIDE-FILMS ON TITANIUM

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