The inhibitive effects of AC-treated mixed self-assembled monolayers on copper corrosion

The inhibitive effects of alternating current-treated (AC-treated) mixed self-assembled monolayer (SAM(HL/DT)) with 2-(Pyridin-2-yliminomethyl)-phenol (HL) and dodecanethiol (DT) on copper corrosion have been studied by using the scanning electrochemical microscope (SECM) combined with Tafel and electrochemical impedance spectroscopy (EIS) methods When the AC-treated potential is applied in the cathodic region, the inhibition efficiency increases, and the pitting dynamic processes are inhibited. All the results reveal that the AC-treated effects are related to both the formation of complex compounds and the reduction of the oxide film on the surface of copper. (C) 2017 Elsevier Ltd. All rights reserved.