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Journal of Chemistry
Volume 2013, Article ID 527286, 4 pages
Research Article

Comparative Corrosion Inhibition Effect of Imidazole Compounds and of Trichodesma indicum (Linn) R. Br. on C38 Steel in 1 M HCl Medium

Department of Chemistry, Karpagam University, Coimbatore 641021, India

Received 6 June 2012; Revised 11 August 2012; Accepted 12 August 2012

Academic Editor: Lutfun Nahar

Copyright © 2013 S. Alarmal Mangai and Subban Ravi. 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.


Corrosion inhibition effect of alkaloid extract part of the plant Trichodesma indicum (Linn) R. Br. of Boraginaceae family was studied and compared with that of imidazole compounds (imidazole, benzimidazole) on C38 steel in 1 M HCl solution by weight loss method at various temperatures. The study showed that the alkaloid part of the plant extract acts as a better inhibitor in comparison to the selected organic inhibitors. The maximum inhibition efficiency of the extract of Trichodesma indicum R. Br. was found to be 94.5% at a concentration of 75 mg/L at 30°C.