Abstract
Electrical conduction in anodic WO3 and Ta2O5 films prepared in aqueous electrolytes have been investigated. The oxide films which are kept in the electrolyte over prolonged periods of time under the anodization voltage give relatively smaller currents, and the current–voltage characteristics for these samples obey a log I–V1/2 type law but the slope changes at higher fields. This may be seen as a change in the conduction mechanism from bulk-limited to electrode-limited at these fields.
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