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ISRN Corrosion
Volume 2012 (2012), Article ID 932403, 8 pages
http://dx.doi.org/10.5402/2012/932403
Research Article

Acid Corrosion Inhibition of Steel by Lamotrigine

1Department of Chemistry, School of Chemical Sciences, Kuvempu University, Karnataka 577 451, India
2Department of Chemistry, Srinivas School of Engineering, Mukka, Mangalore 575 021, India

Received 27 August 2012; Accepted 13 September 2012

Academic Editors: G. Bereket, C. Gu, C.-H. Hsu, I. Obot, and E. Stupnisek-Lisac

Copyright © 2012 B. S. Shylesha et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Corrosion inhibition effect of lamotrigine on steel in 1.0 M HCl and 0.5 M H2SO4 was studied by techniques like weight loss, polarisation, and electrochemical impedance spectroscopy. Results indicated that lamotrigine is more competent in HCl than in H2SO4 and is justified by scanning electron micrographs. Protection efficiency increased with the concentration of inhibitor and decreased with temperature. Adsorption study revealed the comprehensive adsorption of lamotrigine molecules on steel surface.