Electrochemical and computational studies for corrosion and corrosion inhibition of iron in acid media by using some organic corrosion inhibitors

Abstract

Inhibition effect of new Pyridine-pyrimidine heterocyclic derivatives, pyridine-2,6-diamine (Pyr-1) ,pyrimidin-2-amine (Pyr-2), 6-amino-3,4- dihydropyrimidine-2(1H)-thione (Pyr-3) , 4-oxo-6-phenyl-2-thioxo- 1,2,3,4-tetrahydropyrimidine-5-carbonitrile (Pyr-4) ,4-amino-6-(2- hydroxyphenyl)-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile (Pyr-5) ,6-(4-chlorophenyl)-4-oxo-2-thioxo-1,2,3,4-tetrahydropyrimidine- 5-carbonitrile(Pyr-6) ,ethyl(R)-2-mercapto-4-methyl-6-phenyl-1,6- dihydropyrimidine-5-carboxylate (Pyr-7),ethyl(R)-6-(3-hydroxyphenyl)- 2-mercapto-4-methyl-1,6-dihydropyrimidine-5-carboxylate (Pyr- 8),ethyl(R)-6-(4-chlorophenyl)-2-mercapto-4-methyl-1,6-