Abstract: Modified nano-Al₂O₃/epoxy resin composite anti-corrosion coatings were prepared by adding different amounts of modified nano-Al₂O₃ particles into epoxy resin. The effects of nano-Al₂O₃ on the properties of the coating were investigated from the aspects of surface morphology, hardness and wear resistance by scanning electron microscopy, micro Vickers hardness test, Fourier transform infrared spectroscopy and friction and wear test. The results show that adding 5% (mass fraction) nano-Al₂O₃ particles into the epoxy resin could increase the hardness of the coating from 13.4 HV to 19.5 HV, and the wear resistance of the coating improved evidently.