Unused Clopidogrel Drug as Eco-Friendly Corrosion Inhibitor
for Carbon Steel in Aqueous Media1
A. S. Foudaa, *, W. M. Mahmouda, and K. M. A. Elawayebb
aDepartment of Chemistry, Faculty of Science, Mansoura University, Mansoura-35516, Egypt
bDepartment of Pharmaceutical Technology, Faculty of Medical Technology, Misurata University, Lybia
Correspondence to: *e-mail: asfouda@hotmail.com
1The article is published in the original.
Received 30 December, 2015
Abstract—Effect of Clopidogrel drug on the corrosion of carbon steel in 2 M HCl solution has been investigated by various corrosion monitoring techniques. Results obtained reveal that this drug is very good inhibitor. Polarization studies clearly reveal the type of the inhibitor. Changes in impedance parameters (Rct and Cdl) are indicative of adsorption of the drug on the C-steel surface leading to the formation of a protective film. The adsorption of the drug on the C-steel surface follows Temkin adsorption isotherm. The morphology of inhibited carbon steel surface was analyzed and characterized by Fourier transform–infrared (FT-IR) and (UV/vis) spectroscopy. The mechanism of protection process was discussed in terms of the adsorption of Clopidogrel on the metal surface.
DOI: 10.1134/S2070205117010063