A novel core-shell silica@graphene straticulate structured antistatic anticorrosion composite coating

A novel antistatic anticorrosion composite coating was designed. The conductive core-shell straticulate structured silica@graphene and antimony doped tin oxide (ATO) were introduced in the waterborne epoxy coating to significantly decrease electrical resistivity. Reduced graphene oxide (RGO)-encapsulated functionalized silica hybrids (f-SiO 2 @RGO) were fabricated from sodium borohydride reduction of electrostatically assembled f-SiO 2 @GO hybrids with the help of silane coupling agent. The morphologies, the corrosion resistance and the antistatic properties were investigated. In the ATO + f-SiO 2 @RGO/epoxy coating, the f-SiO 2 @RGO sheets were evenly dispersed in coating, forming unique core-shell straticulate structure that effectively prevented the penetration of electrolyte, and constructed a conductive network at the coating-tinplate. The results showed that the antistatic and the anticorrosive performances of ATO + f-SiO 2 @RGO/epoxy coating were significantly enhanced as compared with the addition of 5% other fillers in coating, which includes the same amount of ATO. This superior core-shell f-SiO 2 @RGO straticulate structure and ATO particles, with their prominent conductivity , can make full use of the enhancement effect of different components and thus endow waterborne epoxy coatings with outstanding corrosion resistance and antistatic properties overall.