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E-Journal of Chemistry
Volume 7, Issue 2, Pages 665-668
http://dx.doi.org/10.1155/2010/518543

Ethanolamines as Corrosion Inhibitors for Zinc in (HNO3+H2SO4) Binary Acid Mixture

R. T. Vashi, H. M. Bhajiwala, and S. A. Desai

Department of Chemistry, Navyug Science College, Surat- 395 009 (Gujarat), India

Received 2 November 2009; Accepted 25 December 2009

Copyright © 2010 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

This work deals with the study of corrosion behaviour for zinc in (HNO3+ H2SO4) binary acid mixture containing ethanolamines. Corrosion rate increases with concentration of acid and temperature. At constant acid concentration, the inhibition efficiency of ethanolamines increases with the inhibitor concentration. Value of ΔGa increases and inhibition decreases with temperature. The mode of inhibition action appears to be chemisorption.