Corrosion Study of Two-step Deposition Coatings on Copper Foil

Abstract

To improve corrosion inhibition performance of copper foil with a novel two-step electrochemical modification processes, the surface of 35 µm copper foils was coated with graphene oxide(GO) via electrochemical method at first step, then was further coated with 3-aminopropyltrimethoxysilane(APTS) at the second step. For the first step the copper foil acted as anode, and as cathode for the second one(we labeled it as E-GO). Optimum coating parameters for the preparation of E-GO coating are 5 V and 1 min with ratio of APTS/deionized water(DI) 1.5/98.5(v/v). The physicochemical properties of modified coating were studied by X-ray diffraction(XRD), scanning electron microscopy(SEM) and hydrophilicity test. Electrochemical behavior of different samples were also investigated. The experimental results indicate that anti-corrosion performance is significantly improved with two-step modified coating. And E-GO coating shows more positive corrosion potential and the highest corrosion resistance rate than others according to the Tafel curve. It is also found that surface hydrophobicity of E-GO coating is significantly improved.

Keywords

graphene oxide / silane coupling agent / electrochemical deposition / corrosion resistance

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