Tannic acid (TA), as a biodegradable corrosion inhibitor, was used to modify the graphene (Gr) for improving the water-dispersibility of Gr. Further, the polyaniline (PANI) was enwrapped on the vanadium pentoxide (V₂O₅) surface to increase its conductivity, thus promoting rapid formation of passivation film. Besides, the PANI enwrapped vanadium pentoxide (PV) was self-assembled with the Gr-TA through π-π interaction. Then, the waterborne epoxy coating (WEC) filled with the Gr-TA@PV hybrids were prepared, and the corrosion protection performance of the nanocomposites WEC were investigated through electrochemical and salt spray tests. The results confirmed that the outstanding corrosion protection performance of Gr-TA@PV/WEC derived from the superior barrier property of Gr nanosheets for corrosion agents and its self-healing effect. The self-healing process includes the formation of TA-Fe-TA complex and a passive Fe₂O₃/ Fe₃O₄ layer at the interface of coating/substrate.

单宁酸（TA）作为可生物降解的缓蚀剂，用于修饰石墨烯（Gr）以改善Gr的水分散性。此外，将聚苯胺（PANI）包裹在五氧化二钒（V ₂ O _5）上。）表面增加其导电性，从而促进钝化膜的快速形成。此外，PANI包裹的五氧化二钒（PV）通过π-π相互作用与Gr-TA自组装。然后，制备了填充有Gr-TA @ PV杂化物的水性环氧涂料（WEC），并通过电化学和盐雾试验研究了纳米复合材料WEC的防腐性能。结果证实，Gr-TA @ PV / WEC具有优异的防腐蚀性能，这归因于Gr纳米片材对腐蚀剂的优异阻隔性能及其自修复作用。自修复过程包括形成TA-Fe-TA络合物和被动的Fe ₂ O ₃ / Fe ₃ O _4。 涂层/基材界面处的涂层。