Abstract
Rosin poly(oxyethylene) ester 4,5-dihydroimidazole maleate Adduct (RIMA-PEG), has been applied as corrosion inhibitor for carbon steel. Experimental data for the inhibition efficiency using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) technique and theoretical quantum chemical calculations data indicated that their inhibition effect are closely related to EHOMO, ELUMO, hardness, dipole moment and charge densities. A mechanism for adsorption of RIMA-PEG molecules on carbon steel surface is suggested.