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 phosphate) as well as mixed solutions of aqueous electrolyte with diethylene glycol in the presence of UV radiations has been studied. The results indicate higher rates of growth of titanium oxide film in the presence of UV radiations than those obtained in the absence of radiation. The constants A and B of Guntherschulze-Betz equation. Tafel slopes and 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 solutions have also been obtained and the values are lower in the presence of UV radiation than those in their absence. Breakdown voltage has been found to depend on nature and composition of the electrol