Films by anodic oxidation of mercaptoanilines at Cu electrodes

The anodic oxidation of mercaptoanilina at different metal anodes proves that coherent coatings may be formed in situ on copper only, using the meta isomer. These coatings probably form through the oxidation of an intermediate Cu-3mercaptoaniline complex, which leaves high copper content in the polymer deposit: however, such materials impart outstanding corrosion protection to the substrate. It is suggested that, after easy dimerization of the monomer to disulfide, C-S coupling reactions play a basic role in the constitution of the polymeric network