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E-Journal of Chemistry
Volume 5 (2008), Issue 4, Pages 774-781
http://dx.doi.org/10.1155/2008/913981

Enhancement of the Inhibitor Efficiency of Atropine Methochloride in Corrosion Control of Mild Steel in Sulphuric Acid

Abida Begum,1 Harikrishna S.,2 Irfanulla Khan,3 and Veena K.4

1Department of chemistry, P.E.S School of Engineering, Bangalore, India
2Shirdi Sai Engg. College, Bangalore, India
3Mohammed Ishaque Khan College, Bangalore, India
4Maharanis Science College, Bangalore, India

Received 28 November 2007; Revised 29 January 2008; Accepted 20 March 2008

Copyright © 2008 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

The inhibition efficiency and synergistic behaviour of 10-4 M Atropine methochloride was carried out using mass loss and polarisation methods in the presence of (i) metal ions, Ni2+ and Cu2+ between 10-2 M to 10-6 M concentrations, (ii) different concentrations of metal ions and 10-3 M I-, 10-3 M Cl- and 10-3 M Br- solutions and (iii) different metal ions, 10-3M I- and at three different temperatures. The analysis reveals that the inhibition efficiency of Atropine methochloride was maximum at 10-2 M in 5 hours of immersion period. Halides decreased the corrosion rate of mild steel in Sulphuric acid. The decrease is maximum with 10-3 M I-. As the temperature increased from 298K to 308K, the inhibition efficiency gradually decreased. The inhibitor was found to be effective up to 303K