Table of Contents Author Guidelines Submit a Manuscript
International Journal of Corrosion
Volume 2014, Article ID 679192, 7 pages
http://dx.doi.org/10.1155/2014/679192
Research Article

Evaluation of Corrosion Inhibition of Mild Steel in 1 M Hydrochloric Acid Solution by Mollugo cerviana

1P.G & Research Department of Chemistry, Auxilium College, Vellore 632 006, India
2P.G & Research Department of Chemistry, St. Joseph’s College, Trichy 620 002, India
3School of Planning, Architecture and Civil Engineering, Queen’s University Belfast, Belfast BT7 1NN, UK
4Department of Chemistry, Jeppiaar Engineering College, Chennai 600119, India

Received 28 January 2014; Revised 19 June 2014; Accepted 8 July 2014; Published 21 July 2014

Academic Editor: Sebastian Feliu

Copyright © 2014 P. Arockiasamy 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

The inhibiting effect of methanolic extract of Mollugo cerviana plant on the corrosion of mild steel in 1 M HCl solution has been investigated by different techniques like potentiodynamic polarization, electrochemical impedance spectroscopy, and weight loss methods for five different concentrations of plant extract ranging from 25 to 1000 mg/L. The results indicated that the corrosion inhibition efficiency increased on increasing plant extract concentration till 500 mg/L and decreased on further increasing concentration. The extract was a mixed type inhibitor with the optimum inhibition concentration of 500 mg/L in potentiodynamic polarization. The adsorption of the plant extract on the mild steel surface was found to obey Langmuir adsorption isotherm. Surface analysis was also carried out to find out the surface morphology of the mild steel in the presence and in the absence of the inhibitor to find out its efficiency. The obtained results showed that the Mollugo cerviana extract acts as a good inhibitor for the corrosion of mild steel in 1 M HCl solution.