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Journal of Chemistry
Volume 2014, Article ID 396405, 10 pages
http://dx.doi.org/10.1155/2014/396405
Research Article

Inhibition Effect of Glycerol on the Corrosion of Copper in NaCl Solutions at Different pH Values

1Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, Antigua Carretera a Progreso Km. 6, 97310 Mérida, YUC, Mexico
2Laboratorio de Electroquímica Analítica, Facultad de Química, Universidad Autónoma de Yucatán, Calle 41 No. 421 entre 26 y 28, Colonia Industrial, 97150 Mérida, YUC, Mexico

Received 11 April 2014; Revised 29 May 2014; Accepted 3 June 2014; Published 30 June 2014

Academic Editor: Ying Zhou

Copyright © 2014 Santos Lorenzo Chi-Ucán et al. 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 inhibitory effect of glycerol on copper corrosion in aerated NaCl (0.5 M) solutions at three pH values (4, 7, and 10) was evaluated. Inhibition efficiency was assessed with conventional electrochemical techniques: open circuit potential, potentiodynamic polarization, and electrochemical impedance analysis. Glycerol reduced the corrosion rate of copper in NaCl solutions. The best inhibition effect () was produced in alkaline (pH 10) chloride media. This effect can be ascribed to increased viscosity and the presence of copper-glycerol complexes.