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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Antifungal drugs as corrosion inhibitors for aluminium in 0.1 M HCl
Corrosion Science, Volume 51, No. 8, Year 2009
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Description
The inhibitive capabilities of Clotrimazole (CTM) and Fluconazole (FLC), two antifungal drugs, on the electrochemical corrosion of aluminium in 0.1 M HCl solution has been studied using weight loss measurements at 30 and 50 °C. The results indicate that both compound act as inhibitors in the acidic corrodent. At constant acid concentration, the inhibition efficiency (%I) increased with increase in the concentration of the inhibitors. Increase in temperature increased the corrosion rate in the absence and presence of the inhibitors but decreased the inhibition efficiency. CTM and FLC adsorbed on the surface of aluminium according to the Langmuir adsorption isotherm model at all the concentrations and temperatures studied. Phenomenon of physical adsorption is proposed from the activation parameter obtained. Thermodynamic parameters reveal that the adsorption process is spontaneous. The reactivity of these compounds was analyzed through theoretical calculations based on AM1 semi-empirical method to explain the different efficiencies of these compounds as corrosion inhibitors. CTM was found to be a better inhibitor than FLC. © 2009 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Obot, Ime Bassey
Nigeria, Uyo
University of Uyo
Obi-Egbedi, Nelson Okpako
Nigeria, Ibadan
University of Ibadan
Umoren, Saviour Alphonsus
Nigeria, Uyo
University of Uyo
Statistics
Citations: 318
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1016/j.corsci.2009.05.017
ISSN:
0010938X