The electrochemical synthesis of polyaniline (PANI) on mild steel, aluminum
and copper from the sodium benzoate solutions has been investigated. It has
been shown that thin, highly adherent, polyaniline films on the investigated
metals could be obtained by anodic oxidation with current densities in the
range of 0.5 and 1.5 mA cm-2. The corrosion behavior of mild steel, aluminum
and copper with polyaniline coating in 0.5 mol dm3 NaCl (pH 3) solutions,
has been investigated by polarization technique. The corrosion current
densities, porosity and protection efficiency was determined. It has been
shown that polyaniline coating provided corrosion protection of all
mentioned metals.