Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

Abstract

Experimental and theoretical investigation of sulfadiazine as a corrosion inhibitor for carbon steel in HCl medium

Author(s): B. El Makrini1, M. Larouj2, H. Lgaz1,2, R. Salghi1*, A. Salman3*, M. Belkhaouda1, S. Jodeh4, M. Zougagh5,6 and H. Oudda2

The inhibiting action of Sulfadiazine (SFD) on the corrosion of mild steel in 1 M hydrochloric acid was examined by different corrosion methods, such as weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The experimental results suggest that this compound is an efficient corrosion inhibitor and the inhibition efficiency increases with the increase in inhibitor concentration. Adsorption of this compound on mild steel surface obeys Langmuir’s isotherm. Correlation between quantum chemical calculations and inhibition efficiency of the investigated compound is discussed using the Density Functional Theory method (DFT).


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