Anchoring calcium carbonate on graphene oxide reinforced with anticorrosive properties of composite epoxy coatings

Calcium carbonate nanoparticles (nano-CaCO3) anchored graphene oxide (GO) sheet nanohybrids (GO-CaCO3) are fabricated, and their structure can be measured by scanning electron microscope, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Fourier-transform infrared spectroscopy analysis. Afterwards, composite epoxy coatings, filled with GO and GO-CaCO3 nanohybrids, are prepared via a curing process. The dispersion and anticorrosive properties of composite epoxy coatings are investigated. The results reveal that GO-CaCO3 nanohybrids achieve a homogeneous dispersion as well as reinforce corrosion resistance of epoxy coatings. Furthermore, the anticorrosive mechanisms are tentatively proposed for the GO-CaCO3/epoxy coatings. Copyright (c) 2016 John Wiley & Sons, Ltd.