2-mercapto-1-methylimidazole as corrosion inhibitor of copper in aerated 3% NaCl solution

The effect of the addition of 2-mercapto-1-methylimidazole (McMIm) on the c opper corrosion behaviour in aerated 3% sodium chloride solution was studie d by electrochemical polarization, impedance spectra, cyclic voltammetry me thods and TR spectra. The inhibition efficiencies obtained from cathodic Ta fel plots and polarization resistance methods were in good agreement. McMIm additive was found to be an excellent inhibitor of Cn corrosion. Polarizat ion measurements showed that the investigated molecule acts as a mixed-type inhibitor.