Polyaniline (PANI) coating was electropolymerized on Pb alloy surface using cyclic
voltammetry technique in a sulfuric acid solution containing aniline monomers. The
corrosion performance of PANI coatings in 1M H2SO4 solutions was investigated by an
electrochemical method such as potentiodynamic polarization technique. The influence of
parameters such as cycle number, aniline concentration as well as scan rate on the
anticorrosion properties of PANI film was investigated. The polyaniline coating exhibited a
strong decrease of corrosion current in the acidic medium compared to the bare substrate and
corrosion potential increased from −0.543 V vs SCE for uncoated alloy to 0.425 V for
polyaniline coated lead alloy electrode. The results indicated that Polyaniline coating
effectively protected Pb alloy from corrosion in acidic solutions, suggesting its potential as a
coating material for corrosion protection of lead alloy in aqueous corrosive environments. |
