ano-Al_2O_3 modified with 3-(glycidoxy propyl) trimethoxy silane(GPTMS) was dispersed in polyaniline/waterborne epoxy resin(PANI/EP) to get a homogeneous mixture.The new corrosion resistance coatings were achieved by mixing nano-Al_2O_3 based composites with PANI/EP and the hardener.The corrosion resistance and mechanical properties of the coatings were evaluated by electrochemical impedance spectroscopy,potentiondynamic polarization curve and so on.It is observed that nano-Al_2O_3 based polyaniline/epoxy c...