Preparation and Perfromance of Rare Earth Cerium Modified Graphene Oxide/Waterborne Epoxy Resin Composite Coating
The prepared rare earth cerium modified graphene/waterborne epoxy resin composite coating was applied on the surface of Q235 steel by spraying,rolling and brushing respectively,then of which the structure and corrosion resistance in 3.5％NaCl solution were studied.The results showed that as nano particles,rare earth cerium or CeO2 was chemically deposited on the surface of graphene,while the modified graphene was uniformly distributed in epoxy resin as small lamellae.The applied composite coating on Q235 steel presents a stacked structure of graphene lamellae,while the fractured surface of the coating presents a pattern of river-like silve stripes.The formation of the composite coating applied by different methods may be described as that:the spraying method relies on the high-speed moving gas to impact the atomized coating droplets onto the surface of the substrate and quickly gather and spread them into a film,which improves the combination of the coating to the substrate while purifying the sur-face of the substrate.The roller coating method relies on the wire rod coater,and the brush coating meth-od relies on the soft brush to combine the coating with the substrate.Thus molecules in the coating are easy to stack,and mocropores may easy form on the surface.The adhesion of the coating was mea-sured to be 0-1,the hardness was 2H,and the surface roughness was～2 pm.The corrosion rate is 1.565 × 10-4-5.889 × 10-3 mm/a.It is found that the coating applied by spraying method has the best com-prehensive performance.
rare earth modificationgraphenewater based coatingdecorate method
NETL
NSTL
万方数据
维普
