Electrosynthesis of poly(aniline-co-o-phenylenediamine) film on steel and its corrosion protection performance

Poly(aniline-co-o-phenylenediamine) (Ani-co-oPD) has been electrosynthesized on steel surface by cyclic voltammetry technique from an aqueous oxalic acid electrolyte. The copolymer film was characterized by FTIR, UV, TGA, and SEM techniques. The corrosion protection performance of poly(Ani-co-oPD) film on steel was found out by impedance and Tafel polarization methods in 1% NaCl. The copolymer film was found to be highly corrosion resistant and a suitable mechanism for corrosion protection is suggested.