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Electrochemical and Gravimetric Studies of the Corrosion Inhibition of Mild Steel in HCl Medium by Cephalexin Drug
Current Issue
Volume 1, 2014
Issue 1 (April)
Pages: 1-6   |   Vol. 1, No. 1, April 2014   |   Follow on         
Paper in PDF Downloads: 52   Since Aug. 28, 2015 Views: 2495   Since Aug. 28, 2015
Authors
[1]
I. A. Akpan , Department of Chemistry, University of Uyo, Uyo, Akwa Ibom State, Nigeria.
[2]
N. O. Offiong , Department of Chemistry, University of Uyo, Uyo, Akwa Ibom State, Nigeria.
Abstract
The inhibition effect of cephalexin drug on the corrosion of mild steel in hydrochloric acid medium was investigated by electrochemical and gravimetric techniques at room temperature. The results obtained show that the drug significantly increased the polarization resistance of mild steel by reducing corrosion current densities. The inhibition efficiency increased with corresponding increase in the concentrations of the test drug. The drug inhibitor followed Langmuir’s adsorption isotherm. The gravimetric measurements aided in the classical prediction of a first order kinetics for the corrosion inhibition process.
Keywords
Linear Polarization Resistance, Gravimetric Technique, Corrosion Inhibition, Cephalexin, Mild Steel, HCl
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