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International Journal of Corrosion
Volume 2011 (2011), Article ID 761418, 12 pages
http://dx.doi.org/10.1155/2011/761418
Research Article

Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions

Institute of Chemistry, UJK Kielce, Swietokrzyska Street15G, 25406 Kielce, Poland

Received 19 November 2010; Accepted 1 February 2011

Academic Editor: Flavio Deflorian

Copyright © 2011 M. Scendo and J. Uznanska. 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 influence of the concentration of 1-Butyl-4-methylpyridinium tetrafluoroborate (4MBPBF4) as ionic liquid (IL) on the corrosion of copper in 0.5 M P O 4 3 solutions of pH 2 and 4 was studied. The research involved electrochemical polarization method, and scanning electron microscopy (SEM) technique. The results obtained showed that the inhibition efficiency of corrosion of copper increases with an increase in the concentration of 4MBPBF4 but decreases with increasing temperature. The thermodynamic functions of corrosion analysis and adsorptive behavior of 4MBPBF4 were carried out. During the test, the adsorption of the inhibitor on the copper surface in the phosphate solutions was found to obey the Langmuir adsorption isotherm and had a physical mechanism.