Inhibition Effect of 3-bromo-2-phenylimidazol[1,2- a]pyridine towards C38 Steel Corrosion in 0.5M H2SO4 Solution.

The inhibition effect of 3-bromo-2-phenylimidazol[1,2- a]pyridine on the corrosion behaviour of C38 steel in 0.5M H2SO4 solution was investigated using weight loss, potentiostatic polarization and electrochemical impedance spectroscopy methods. The inhibition efficiency increased as the concentration of the inhibitors was increased. The effect of temperature on corrosion inhibition was investigated by electrochemical impedance spectroscopy method and thermodynamic parameters were calculated. Potentiodynamic polarization measurements show that the studied inhibitor acts as mixed inhibitor. The adsorption of inhibitors on C38 steel surface obeys Langmuir adsorption isotherm.