Corrosion protection of copper by polyaminophenol films

The anticorrosion behaviour of polyaminophenol (PAP) films has been investi gated in aqueous 0.5 M NaCl solution using electrochemical impedance spectr oscopy and weight loss measurements. The effect of triazole compounds on th e protection behaviour of the polymer was also examined. The polymer is obt ained by in situ electropolymerization of 2-aminophenol monomer in alkaline hydroalcoholic solution. The results show that the polymer film reduces th e corrosion of copper and that the electropolymerization in the presence of the azole compounds further increases the protective character of the coat ing. The polymer copper/solution interface is well described by an electric al equivalent circuit reflecting the behaviour typical of a porous film. (C ) 2000 Elsevier Science S.A. All rights reserved.