Table of Contents Author Guidelines Submit a Manuscript
E-Journal of Chemistry
Volume 8, Issue 1, Pages 85-90
http://dx.doi.org/10.1155/2011/340639

Corrosion Inhibition of Aluminium in Acid Media By Citrullus Colocynthis Extract

Rajkiran Chauhan,1 Urvija Garg,1 and R. K. Tak2

1Department of Chemistry Government College, Ajmer (Rajasthan), India
2Department of Chemistry Faculty of Science, Government College, Ajmer (Rajasthan), India

Received 27 April 2010; Accepted 17 June 2010

Copyright © 2011 Hindawi Publishing Corporation. 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

Inhibition of corrosion of aluminium in acid solution by methanol extract of Citrullus colocynthis plant has been studied using mass loss and thermometric measurements. It has been found that the plant extract act as a good corrosion inhibitor for aluminium in all concentrations of sulphuric and hydrochloric acid solution. The inhibition action depends on the concentration of acid and inhibitor. Results for mass loss and thermometric measurement indicate that inhibition efficiency increase with increasing inhibitor concentration. The inhibition action of the plant extract is discussed in view of Langmuir adsorption isotherm. It has been observed that the adsorption of the extract on aluminium surface is a spontaneous process. The plant extract provides a good protection to aluminium against corrosion.