Effect mechanism of the Fe3O4 nanoparticles on mechanical properties and anticorrosion performances of epoxy coatings

The hydrophobic magnetic Fe3O4 nanoparticles (OMNPs), which were synthesized via the co-precipitation method and following modification with oleic acid, appeared excellent hydrophobic and lipophilic properties after being characterized both in water and in epoxy resin. Furthermore, the mechanical and anticorrosion properties of the OMNPS modified epoxy coatings were characterized by tensile stress test, indentation hardness test, adhesion strength test, and Electrochemical Impedance Spectroscopy (EIS) technique. The results showed that both mechanical properties and the corrosion resistance of the epoxy coating could be significantly affected by the surface modification and the addition amount of OMNPs, which provided a possible approach to enhance the anticorrosion ability of epoxy organic coatings.