Kinetics of reanodization of porous anodic oxide films on aluminium formed in pore-forming solutions of various acids

Abstract

Investigations are carried out towards reanodization of porous anodic oxide films on aluminium formed in aqueous solutions of sulphuric, oxalic and chromic acid. These films are prepared in a way to have one and the same porosity. It is found out that in case of equal porosity the slopes of the kinetic voltage-time curves recorded during reanodization are different. The effect of the anionic species incorporated from electrolyte solution into the porous template could be a probable explanation for the dissimilar rates of barrier layer growth.