PANI-nano TiO2 composite coatings on a steel electrode have been successfully electrosynthesized from aniline in aqueous oxalic acid solution containing nano TiO2 using cyclic voltammetry. Formation of the PANI-TiO2 coating was found to be strongly dependent on the number of cycles. Smooth and strongly adherent PANI-TiO2 coatings were obtained during sequential scanning of the potential region between-0.5 to 1.6 V, at a scan rate of 10 mV s(-1). During the repetitive cyclic voltammetry scans the presence of TiO2 nanoparticles inhibits the polymer oxidation process. Good adhesion of composite coatings on the steel electrode, with superior electro-active characteristics in comparison with pure polyaniline, was demonstrated. PANI-TiO2 coatings were characterized by FTIR, SEM, and XPS techniques. The corrosion behaviour of coated steel was investigated by Electrochemical Impedance Spectroscopy and Tafel studies in 1% NaCl solution and it was found that the PANI-TiO2 coating was found to be more corrosion resistant than that of pure PANI coating due to compact coating formation. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.023112jes]