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https://www.ias.ac.in/article/fulltext/boms/034/03/0563-0569

Stainless steel; IR spectroscopy; cyclic voltammetry; pitting corrosion; EIS; SEM.

Conducting polymers of polyaniline (PANi) and poly(o-phenylenediamine) (PoPD) were electropolymerized by cyclic voltammetric technique on low nickel stainless steel (LN SS) in H₂SO₄ solution containing aniline and 𝑜-phenylenediamine monomers. The coatings were characterized by Fourier transform infrared spectroscopy, UV-visible and scanning electron microscopic techniques and the results are discussed. The corrosion protective properties of PANi and PoPD coatings on LN SS in 0.5 M NaCl were evaluated using potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) techniques. The potentiodynamic polarization and electrochemical impedance spectroscopic results indicate that the PoPD coating inhibits the corrosion of LN SS in 0.5 M NaCl solution more effectively than PANi.

T Dhanabal¹ G Amirthaganesan¹ J Ravichandran¹

1. Post Graduate and Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641 020, India

Published

June 2011

Manuscript received

25 August 2010

Manuscript revised

28 October 2010