The epoxy coating interfacial adhesion and corrosion protection properties enhancement through deposition of cerium oxide nanofilm modified by graphene oxide

This paper aims at improving the cathodic disbonding, corrosion protection and adhesion properties of epoxy coating through steel substrate treatment by cerium nanofilm. For this purpose, the cerium film was modified by graphene oxide nanosheets, which are covalently functionalized with silane coupling agent. The performance of this coating was studied by electrochemical impedance spectroscopy, Pull-off adhesion and cathodic delamination tests and the morphology of the modified cerium film was investigated by field-emission scanning electron microscopy. Results revealed that modifying the cerium nanofilm led to the better adhesion strength, corrosion protection performance and lower cathodic delamination rate of epoxy coating. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.