Khaled Abdelazim, K. F. Khaled, nashwa abdelshafy
Mar 28, 2021
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Influential Citations
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Citations
Journal
The Egyptian Journal of Chemistry
Abstract
The effect of three pyrimidine derivatives namely, 6-amino-3,4-dihydropryimidin-2(1H)-thione (Pyr-3) , ethyl (R)-2mercapto-4-methyl-6-phenyl-1,6-dihydropyrimidine-5-carboxylate (Pyr-7) and ethyl (R)-6-(4-chlorophenyl)-2-mercapto-4methyl-1,6dihydropyrimidine-5-carboxylate (Pyr-9) on the corrosion of iron in 1.0 M HCl in absence and presence of various concentrations ranging from 10 to 10 M has been studied. Both electrochemical (potentiodynamic, electrochemical impedance spectroscopy and electrochemical frequency modulation) and computational studies (quantum chemical calculations and molecular dynamic simulations) have been used in this study. Electrochemical investigations show the effectiveness of the studied pyrimidine derivatives as corrosion inhibitors. The best inhibition efficiency reached 96% for Pyr9 at 10 M. The studied pyrimidine derivatives were of mixed type inhibitor. Equivalent circuit for the studied system was determined. The studied pyrimidine derivatives follow Langumir adsorption isotherm. Computational study confirms the experimental investigation.