Table of Contents
ISRN Corrosion
Volume 2013 (2013), Article ID 370802, 7 pages
http://dx.doi.org/10.1155/2013/370802
Research Article

Cuminum cyminum Extracts as Eco-Friendly Corrosion Inhibitor for Mild Steel in Seawater

1PG and Research Department, GTN Arts College, Dindigul 624005, Tamil Nadu, India
2Department of Chemistry, RVS School of Engineering and Technology, Dindigul 624005, Tamil Nadu, India

Received 8 October 2012; Accepted 30 October 2012

Academic Editors: C. Gervasi, I. Obot, and Q. Qu

Copyright © 2013 V. Sribharathy and Susai Rajendran. 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 inhibitive effect of Jeera (Cuminum cyminum) plant extracts on the corrosion of mild steel in an aqueous solution of seawater was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The stability of the inhibition efficiency of Jeera extracts was examined by weight-loss method. Potentiodynamic polarization curves indicated that the Jeera extract behaves as an anodic type inhibitor. EIS measurements showed that the dissolution process occurs under activation control. The corrosion rates of steel and the inhibition efficiencies of the extract obtained from impedance and polarization measurements were in good agreement. Inhibition was found to increase with an increasing concentration of the plant extract. The results obtained show that the Jeera extract could serve as an effective inhibitor for the corrosion of mild steel in seawater.