In this research an attempt has been made to evaluate the effect of surface modified nano-Fe2O3 particles on the anticorrosion and adhesion properties of epoxy coatings. Nano particles are treated by 3-aminopropyltriethoxysilane (APTES). Epoxy coatings loaded by various amounts of nano pigments are implemented on mild steel substrates. FTIR technique is used to assess the formation of chemical bonds on particles’ surfaces. Dispersion of nano pigments in epoxy matrix is studied by UV-visible FESEM and EDS techniques. Anticorrosion and adhesion properties of nano composites are evaluated by EIS and Pull-off. Results showed that grafting of aminosilanes is successfully accomplished on nano particles surfaces. Nano iron oxide particles were dispersed uniformly in the epoxy matrix due to the surface modification process. In addition anticorrosion and adhesion properties of coatings containing nano particles increased remarkably especially in the presence of 3%wt nano iron oxide.