Research on the Preparation and Anticorrosion Properties of EP/CeO2-GO Nanocomposite Coating

Abstract

Due to its special two-dimensional lamellar structure, graphene possesses an excellent shielding effect, hydrophobic characteristics and large specific surface area, which can effectively isolate the internal structure from the external corrosive media. However, lamellar graphene is easy to stack and agglomerate, which limits its anti-corrosion performance. In this paper, cerium oxide-graphene oxide (CeO2-GO) nanocomposites were prepared by a hydrothermal synthesis method. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) were applied for microstructure examination, showing that a large number of nanoscale granular cerium oxide grew on the lamellar graphene oxide surface, which improved the dispersion performance of graphene inside the matrix. The anti-corrosion properties of the coating were analyzed and illustrated by open circuit potential (OCP), frequency response analysis, Tafel curve and Mott–Schottky curve. The results indicated that the CeO2-GO (4:1) nanocomposite not only eliminated the agglomeration of graphene to some extent, but also prepared the graphene epoxy coating with good dispersion, which further promoted its anti-corrosion performance. The paper proposed a feasible solution for GO dispersion in cement-based materials and lays a solid theoretical foundation for the engineering application of cerium oxide-graphene oxide modified anticorrosive coating.

Preparation of Nanofibers of Poly (methyl methacrylate) Composited with Few-Layer-Graphene for Anticorrosion Layer

“…When the carbon black was increased, ane increased corrosion current was observed due to the excess of carbon black inside the polymer. This behavior can be seen in other composite materials such as polyaniline/clinoptilolite nanocomposite, cerium oxidegraphene oxide, and multiwall carbon nanotubes-reinforced epoxy [30][31][32]. Electrochemical impedance spectroscopy is a technique that had been widely used to investigate the mechanisms of electrochemical applications [4].…”

Research on the Anticorrosion Properties of CeO2-GO/EP Nanocomposite Coating in Simulated Sea Water

“…The sample was ultrasonically cleaned in alcohol to remove the debris caused by the grinding and polishing procedure. CeO 2 -GO(4:1) nanocomposites were prepared by a hydrothermal synthesis method [ 21 ]. Then, 4 g epoxy was measured, and a certain amount of CeO 2 -GO(4:1) (0.5 wt% of the epoxy mass) was added to the epoxy after a 30 min ultrasonic dispersion process.…”

“…Cerium oxide (CeO 2 ) can be used as a nano-sheet layered material [ 19 , 20 ]. The study [ 21 ] has shown that when the mass ratio of CeO 2 to GO is 4:1, the anti-corrosion effect of epoxy(EP) coating with CeO 2 -GO nanocomposites is very significant. CeO 2 is evenly distributed on the GO surface, which improves the agglomeration of GO.…”

Preparation and anticorrosion properties of GO‐Ce‐MOF nanocomposite coatings

“…Therefore, many efforts have been made to reduce its sheets aggregation by introduction of nanoparticles to the sheets so as to improve its dispersion in polymer. Liu et al 42 synthesized the cerium oxide‐GO composite material by hydrothermal method to greatly enhance the corrosion resistance of the composite coating to improve the accumulation and agglomeration of GO in epoxy resin.…”