Abstract
Hybrid material polypyrrole / PW 12 O 40 3 - was electrosynthesised on carbon steel electrodes in acetonitrile medium. Passivation pretreatment of carbon steel in acetonitrile/perchlorate medium was used to avoid electrodissolution of electrode during the polymerisation. These hybrid coatings were evaluated against corrosion in chloride-containing 0.05 M NaOH and solutions obtained by filtering Portland cement slurries. Cyclic voltammetry, polarisation resistance ( R p), and Fe 2+ concentrations measurements showed that the obtained coatings provide good protection against corrosion in chloride-containing media.
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