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

Journal of Applied Chemical Research

مقاله 2، دوره 12، شماره 4، دی 2018، صفحه 21-30   

نوع مقاله: Research Paper

نویسندگان

Laya Nejati Moghadam¹؛ Effat Jamalizadeh^{* 2}؛ Zahra Hassani³؛ Amir Hossein Jafari⁴

¹Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran Young Researchers and Elite Club, Kerman Branch, Islamic Azad University, Kerman, Iran

²Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran

³Department of New Materials, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran

⁴Department of Materials Science and Metallurgy, Shahid Bahonar University of Kerman, Kerman, Iran

چکیده

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

کلیدواژه‌ها

Corrosion Inhibitor؛ Sulfuric Acid؛ 2-Hydropyrimidine-2-Thione Derivative؛ Potentiostatic polarization؛ Docking Technique