engleski

Protective properties of an inhibitor layer formed on copper in neutral chloride solution

The objective of this work was to investigate the efficiency of 1-phenyl-4-methylimidazole for corrosion inhibition of copper in 3% NaCl solution. Formation of a thick layer on the copper surface was observed in the presence of this compound. Protective properties of this layer were characterized by means of cyclic voltammetry and through AFM and SEM/EDX measurements. Voltammetric measurements were performed in stirred and quiescent solutions as well as at the different immersion times. Results obtained by voltammetric measurements showed that the protective properties of this layer were enhanced by stirring and with the increase of the immersion time. Time dependence of protective layer formation was characterized by AFM measurements. According to SEM/EDX measurements it was concluded that this protecting layer has complex structure consisting of the inhibitor and corrosion products.

AFM ; copper corrosion ; corrosion inhibitor ; cyclic voltammetry ; imidazole ; SEM/EDX

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