Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution by 2-Hydropyrimidine-2-Thione Derivative

The corrosion inhibition potential and efficacy of 2-hydropyrimidine-2-thione derivative on mildsteel in 0.5 M sulfuric acid solution was investigated using electrochemical polarization and FTIRspectroscopic techniques. In addition, docking studies were carried out as theoretical investigationof adsorption inhibitor on iron surface. The results of polarization studies indicate the exceptionallystrong efficiency of this compound as an inhibitor in H2SO4 solution. The electrochemical studies toelucidate the mechanism indicated adsorption obeying the Langmuir isotherm to be the main modeof action. The FTIR results indicated the presence of inhibitor molecules to formation protectivelayer on the surface of mild steel. Theoretical findings show that the most stable states ofcompound/iron system are via the molecular sites containing S atoms, ester groups and aromaticrings.