Abstract
Inhibitive performance of 2-Mercapto-1-Methyl Imidazole on corrosion behavior of mild steel in 5% HCl solution was investigated by means of weight loss, electrochemical measurements, SEM and EDX. The increase in concentration and immersion time shows a positive effect on inhibition efficiency, while temperature has a negative effect. Polarization curves reveal that MMI is a cathodic type inhibitor. Changes in impedance parameters were indicative of the formation of a protective film on the metal surface. The adsorption of MMI on mild steel surface obeys Langmuir adsorption isotherm. Some thermodynamic functions of dissolution and adsorption processes were also determined.