Enhancing the corrosion resistance of epoxy coatings
The main goal of a research project was to enhance the corrosion inhibiting performance of graphene oxide (GO) nanofillers in epoxy coatings via modifying the surface of the GO sheets with silane coupling-agents.
The scientists have employed 3-aminopropyl triethoxysilane (APTES) and 3-glysidyloxypropyl trimethoxysilane (GPTMS) as silane agents with amine and epoxy end-groups, respectively, to investigate the effect of silane type on the properties of nanocomposite coatings.
Functionalised GO improves corrosion resistance
The results reveal that silane functionalisation of GO significantly improves the adhesion of coatings on metal substrate and increases the water contact angle on epoxy coatings. Although all prepared nanocomposites show superior barrier properties via tortuousing the diffusion path of corrosive species in epoxy matrix, electrochemical analysis exhibit that incorporation of APTES-GO with amine end-groups more efficiently enhances the corrosion resistance of epoxy coating. The investigation offers new aspects for selecting the kind of silane agent for modifying GO sheets and developing epoxy coatings with high corrosion protection efficiency.
The study is published in: Progress in Organic Coatings, Volume 111, October 2017, Pages 47-56
Education tips
If you want to learn more on epoxy-coatings or anticorrosive coatings the European Coatings Seminars in Amsterdam is the place to be. Both conferences will give you a basic understanding on their topic and bring you in contact with well known experts from the field. The epoxy coating seminar will take place on October 10, the anticorrosive coatings seminar at October 11.
