Investigation of Anti-corrosion and Adhesion Properties of Epoxy Coatings Containing Surface Modified Fe_2O_3 Nano Particles on Mild Steel

摘要

In this research, an attempt has been made to evaluate the effect of surface modified nano-Fe_2O_3 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 are dispersed uniformly in the epoxy matrix due to the surface modification process. In addition, anticorrosion and adhesion properties of coatings containing nano particles increase remarkably especially in the presence of 3%wt nano iron oxide.