Title of article :
Inhibiting effects of 2-mercapto-1-methylimidazole on copper corrosion in 0.5 M sulfuric acid
Author/Authors :
Benali, O. Université de Saïda - Faculté des Sciences et de la Technologie - Département de Biologie, Algeria , Larabi, L. Université Abou Bakr Belkaïd - Faculté des Sciences - Département de Chimie, Algeria , Harek, Y. Université Abou Bakr Belkaïd - Faculté des Sciences - Département de Chimie, Algeria
Abstract :
The inhibiting efficiency of 2-mercapto-1-methylimidazole (MMI) on copper corrosionin sulfuric acid was investigated at 30 ˚C. Its effectiveness was assessed through electrochemicalimpedance spectroscopy, potentiodynamic polarization and gravimetric measurements. The resultsof study reveal that the inhibition efficiency of MMI depends on its concentration and attainsapproximately 81% at 10^-4 M. The inhibitor was adsorbed on the copper surface according theLangmuir adsorption isotherm model. The value of standard free energy of adsorption was calculatedfrom this isotherm.
Keywords :
Copper , Corrosion inhibition , Sulfuric acid , 2 , Mercapto , 1 , methylimidazole
Journal title :
Journal of Saudi Chemical Society
Journal title :
Journal of Saudi Chemical Society
