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E-Journal of Chemistry
Volume 8, Issue 3, Pages 1250-1257
http://dx.doi.org/10.1155/2011/128682

Adsorption and Inhibitive Properties of Triazolo- pyrimidine Derivatives in Acid Corrosion of Mild Steel

K. Parameswari,1 S. Chitra,1 S. Kavitha,1 J. Rajpriya,1 and A. Selvaraj2

1PSGR Krishnammal College for Women, Coimbatore, Tamilnadu, India
2CBM College, Coimbatore, Tamilnadu, India

Received 16 September 2010; Revised 19 November 2010; Accepted 15 December 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

Inhibitive and adsorption properties of synthesized triazolo- pryimidine derivatives (P1, P2 & P3 ) for the corrosion of mild steel was investigated using weight loss and electrochemical methods. Inhibition efficiency increased as the concentration of the inhibitor increased but decreased with increase in temperature. The triazolopyrimidines were found to act as adsorption inhibitors for the corrosion of mild steel. The adsorption mechanism of the triazolopyrimidine was found to be physisorption, spontaneous and exothermic. Also the adsorption followed Langmuir adsorption isotherm. polarisation studies showed that the inhibitors behave as cathodic type.