采用球磨分散法制备得到三聚磷酸铝 /氧化石墨烯水性复合防腐浆料（ AlTP/GO）并与水性环氧树脂复配制得纳米复合防腐涂料（ EP-AlTP/GO）。通过场发射扫描电镜（ FE-SEM）观，测到 AlTP/GO可均匀分散到 EP树脂内部。吸水率测试结果表明，氧化石墨烯的引入提高了涂层的耐水性和屏蔽性能；附着强度测试结果表明，三聚磷酸铝可提高涂层在金属基材上的附着强度；电化学测试（Bode）和环境扫描电镜测试（ E-SEM）结果表明， AlTP/GO可有效增强水性环氧涂层对腐蚀介质的屏蔽作用，限制了腐蚀反应的扩散，在 3.5%NaCl水溶液中浸泡 40 d后其低频阻抗达到 7.02×107Ω·cm2，盐雾测试 400 h后金属表面平滑，金属腐蚀未发生明显扩散， EP-AlTP/GO人工破损处周边含氧量低至 15.66%，遏制了氧化铁的形成。
The water-based aluminum triphosphate/graphene oxide composite anticorrosion pigment was prepared by Ball-mill dispersion method, and it was applied to water-based epoxy resin to prepare EP-AlTP/GO nanocomposite coating. AlTP/GO could be evenly dispersed into EP resin which was observed by field emission scanning electron microscopy (FE-SEM). The water absorption test showed that the introduction of graphene oxide improved the water resistance and shielding performance of the coating. The adhesion strength test results showed that aluminum triphosphate improved the adhesion strength of the coating in metal substrate Electrochemical test (Bode) and environmental scanning electron microscopy test (E-SEM) showed that AlTP/GO effectively enhanced the water-based epoxy coating for the shielding effect of corrosion medium and limited the spread of the corrosion reaction. The low frequency impedance was 7.02 x 107 Ω. cm2 after immersion at 3.5 wt. % NaCl aqueous solution 40 days, the metal surface was smooth after salt spray test 400h.The EP-AlTP/GO coating showed excellent anticorrosion performance.
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