ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Conducting polyaniline/multi-wall carbon nanotubes composite paints on low carbon steel for corrosion protection: electrochemical investigations

Pravin P. Deshpande, Sanket S. Vathare, Shashikant T. Vagge, Elena Tomšík, and Jaroslav Stejskal

Department of Metallurgy and Materials Science, College of Engineering, Shivajinagar, 411005, Pune, India

E-mail: pravinpd@hotmail.com

Abstract: The coaxial coating of multi-wall carbon nanotubes (MWCNT) with poly(aniline) (PANI) was synthesised and a paint was prepared containing conducting PANI-MWCNT composite. The corrosion protection performance was assessed by open circuit potential measurements, potentiodynamic polarisation, and electrochemical impedance spectroscopy. The corrosion rate of low-carbon steel coated with 1.5 mass % of PANI-MWCNT-based paint in 3.5 mass % sodium chloride solution was found to be 0.037 mm y⁻¹, about 5.2 times lower than that of unpainted low-carbon steel and 3.6 times lower than that of epoxy painted steel.

Keywords: corrosion – polyaniline – conducting polymer – carbon nanotubes

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0273-9

Chemical Papers 67 (8) 1072–1078 (2013)