采用氧化石墨烯(RGO)、改性环氧树脂、环氧固化剂、锌粉、长石粉等填料和特殊助剂按着一定比例混合制备出石墨烯锌粉涂料。采用SEM对石墨烯锌粉涂料和环氧富锌底漆的形貌进行了表征,结果表明石墨烯的加入使得涂层形成了致密性的结构。中性盐雾试验(NSS)、附着力试验和动电位极化测试表明石墨烯锌粉涂料比环氧富锌底漆具有更优异的防腐性能。当涂层干膜中w(Zn)=60%,w(石墨烯)=0.5%时,涂层的防腐性能最优。与环氧富锌底漆相比,耐中性盐雾时间从800 h提高至3 500 h,拉拔附着力从8 MPa提高至22.8 MPa,腐蚀电位从57 mV提高至140 mV。并对石墨烯锌粉涂料的防腐机理进行了简单的探讨。

Graphene zinc coating was prepared by mixing graphene,epoxy resin,epoxy curing agent,zinc-based material,feldspar powder and other fillers with special additives in a certain proportion.The SEM was used to describe rgo zinc coating's topography and epoxy zinc rich primer and the results showed that the coating formed a compact structure with the addition of graphene.Neutral salt spray(NSS),adhesion and tafel polarization show that the graphene zinc coating has better anticorrosion performance than epoxy zinc rich primer.The dry film of graphene zinc coating containing 60%Zn and 0.5%graphene(mass fraction)exhibited the best corrosion resistance.Compared with the epoxy zinc rich primer,the neutral salt spray resistance time increased from 800 hours to 3500 hours,the drawing adhension increased from 8 MPa to 22.8 MPa,and the corrosion potential increased from 57 mV to 140 mV.The anti-corrosion mechanism of graphene zinc coating was also discussed.