engleski

Copper Protection by a Self-Assembled Monolayer of Alkanethiol: Comparison with Benzotriazole

Self-assembled monolayers (SAMs) formed by the adsorption of alkanethiols onto copper is a simple method for producing coatings that can protect the metal against oxidation and corrosion. However, a contradiction regarding the influence of oxygen on the SAMs formation and barrier properties is still present. In this work the self-assembled monolayers of dodecanethiol were formed on the copper substrates from ethanolic solutions of dodecanethiol with and without the presence of dissolved oxygen. The protecting properties of monolayers, were studied in a sodium acetate solution with a pH of 6 using cyclic voltammetry and electrochemical impedance spectroscopy. The effect of exposing samples, prepared in the deoxygenated solutions, to air was also studied to examine the decrease in the protecting properties of the SAMs against copper corrosion. The protection efficiency of the dodecanethiol SAMs was compared with those of benzotriazole which is known as the best inhibitor for copper corrosion.

self-assembled monolayer; copper; corrosion protection; electrochemical impedance spectroscopy

nije evidentirano