Synthesis and Inhibition Efficiency of 2-(2-trichloromethyl-4,5-dihydro-imidazol-1-yl)-Ethylamine

A novel imidazoline compound,2-(2-trichloromethyl-4,5-dihydro-imidazol-1-yl)-ethylamine (CIM) was synthesized in laboratory.The structure of CIM was identified by 1H-NMR and FTIR.Weight-loss method,potentiodynamic polarization,electrochemical impedance spectroscopy (EIS) techniques and scanning electron microscopy (SEM) were used to investigate the corrosion behavior of mild steel in 0.5 mol/L HCl solution with or without CIM.The results showed that the inhibition efficiency of CIM increased with increasing inhibitor concentration and kept effective at high temperatures.The imidazoline compound is a mixed-type inhibitor whose adsorption behavior onto mild steel surface can be well expressed by Langmuir isotherm equation.