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

Abstract

The corrosion inhibition potential and efficacy of 2-hydropyrimidine-2-thione derivative on mild<br />steel in 0.5 M sulfuric acid solution was investigated using electrochemical polarization and FTIR<br />spectroscopic techniques. In addition, docking studies were carried out as theoretical investigation<br />of adsorption inhibitor on iron surface. The results of polarization studies indicate the exceptionally<br />strong efficiency of this compound as an inhibitor in H2SO4 solution. The electrochemical studies to<br />elucidate the mechanism indicated adsorption obeying the Langmuir isotherm to be the main mode<br />of action. The FTIR results indicated the presence of inhibitor molecules to formation protective<br />layer on the surface of mild steel. Theoretical findings show that the most stable states of<br />compound/iron system are via the molecular sites containing S atoms, ester groups and aromatic<br />rings.