FORMATION OF ANODIC OXIDE-FILMS ON TITANIUM IN THE PRESENCE OF ULTRAVIOLET RADIATIONS

The anodic growth of oxide films on titanium in aqueous electrolytes ( phosphoric acid, sodium dihydrogen phosphate and disodium hydrogen pho sphate) as well as mixed solutions of aqueous electrolyte with diethyl ene glycol in the presence of UV radiations has been studied. The resu lts indicate higher rates of growth of titanium oxide film in the pres ence of UV radiations than those obtained in the absence of radiation. The constants A and B of Guntherschulze-Betz equation. Tafel slopes a nd halfjump distances have been evaluated and their dependence on the nature of composition of electrolyte has been discussed. The breakdown voltages for titanium oxide films in contact with aqueous and mixed s olutions have also been obtained and the values are lower in the prese nce of UV radiation than those in their absence. Breakdown voltage has been found to depend on nature and composition of the electrol