Preparation And Anticorrosion Properties Of Go-Ce-Mof Nanocomposite Coatings

Herein, a new strategy for improving epoxy coatings' anti-corrosion performance has been developed, which combined NH2-Ce-MOF with graphene oxide (GO) by hydrothermal method. First, the nanocomposite material's morphology and structure (GO-Ce-MOF) were confirmed by Fourier transform infrared, X-ray diffraction, TG, X-ray photoelectron spectroscopy, and scanning electron microscope (SEM) studies. The dispersity of the composite in the epoxy coating was evaluated by SEM and mapping analysis. Meanwhile, the anti-corrosion of as-prepared composite coatings was investigated in detail by the electrochemical impedance spectroscopy (EIS) and the Tafel polarization curve test. The results illustrated that 2.0 wt% GO-Ce-MOF/EP greatly enhanced the composite coating's anti-corrosion performance compared to other coatings. The reasons for the improvement of the anti-corrosion performance of the composite coating are attributed to the following two aspects: On the one hand, the addition of GO can provide a physical barrier to form a labyrinth effect to slow down the invasion of corrosive media into the metal substrate, on the other hand, the modification of GO can GO-Ce-MOF achieve better compatibility and dispersion in epoxy resin.