TEOS is used as an organosilane to prepare SiO2-GO nanohybrids. SiO2-GO nanohybrids are used as nanofiller in epoxy coatings. Adhesion and water contact angle of epoxy coating increases by adding SiO2-GO. Epoxy coatings containing SiO2-GO nanohybrids show superior corrosion protection. Mechanism of SiO2-GO nanohybrids on properties of epoxy coatings is proposed.