Corrosion Protective Methyl Substituted Polyaniline Coatings on Oxidizable Metals
Poly(o-toluidine) (POT) coatings were electrodeposited as corrosion protective coatings on low carbon steel (LCS), 304 stainless steel (SS) and copper (Cu) substrates. POT coatings on metal substrates have been carried out under cyclic voltammetric conditions in an aqueous sodium salicylate solution. The role of substrates during electrochemical polymerization also studied. Then, POT coatings were characterized by UV-visible (UV) and Fourier transforms infrared (FTIR) spectroscopic techniques. Corrosion resistance performances of these coatings were studied in NaCl solution by potentiodynamic polarization measurement and electrochemical impedance spectroscopy (EIS). The results reveal that POT coating on metals prevents corrosion, reduces the corrosion rate.