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International Journal of Electrochemistry
Volume 2011 (2011), Article ID 157576, 8 pages
http://dx.doi.org/10.4061/2011/157576
Research Article

Inhibition Effect of Miconazole Nitrate on the Corrosion of Mild Steel in Hydrochloric Acid Medium

1Department of Chemistry, Mangalore University, Mangalagangotri, Karnataka 574199, India
2Department of Chemistry, Shree Devi Institute of Technology, Karnataka 575003, India

Received 17 November 2010; Revised 30 April 2011; Accepted 10 May 2011

Academic Editor: Gerd-Uwe Flechsig

Copyright © 2011 J. Ishwara Bhat and Vijaya D. P. Alva. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion inhibition of mild steel by miconazole nitrate, an antifungal drug has been investigated using potentiodynamic polarization, electrochemical impedance spectroscopy technique, and weight loss methods. The experimental results suggested miconazole nitrate is a good corrosion inhibitor for mild steel in 1 M hydrochloric acid medium. The inhibition efficiency increased with increase in inhibitor concentration. The thermodynamic parameters were determined and discussed. The inhibition was assumed to occur via adsorption of the inhibitor molecule on the surface of mild steel following Langmuir adsorption isotherm.