engleski

Corrosion Protection on Copper by Imidazole and its Derivatives

The objective of this work was to investigate the efficiency of imidazole and its derivatives 4-methylimidazole, 4-methyl-5-hydroxymethylimidazole, 1-phenyl-4-methylimidazole, 1-(p-tolyl)-4-methylimidazole for corrosion inhibition of copper in 0.5M hydrochloric acid. Corrosion inhibition was studied using impedance spectroscopy and potentiodynamic methods. Polarization resistances calculated from the AC impedance measurements are in good agreement with those obtained from d.c. polarization measurements. The copper samples were also analysed by scanning electron microscopy (SEM) and X-rays microanalysis. These studies have shown that 1-(p-tolyl)-4-methylimidazole has the best inhibitory efficiency.

copper; hydrochloric acid; imidazoles; inhibition; EIS; SEM

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