Abstract This work introduced an in-situ polymerization method to synthesize nanoscale additive for waterborne epoxy (WEP) coatings. The polypyrrole functionalized graphene oxide (GO-PPy) was synthesized via in-situ process to grow polypyrrole (PPy) film on graphene oxide (GO) surface. The structures and morphologies of the synthesized nanocomposites were characterized by FI-TR, XRD, Raman and FESEM techniques. Incorporation of two mass ratios of GO-PPy nanocomposite into the WEP coating had an obvious improvement in corrosion protection performance of the coating. Among the nanocomposite coatings, GP0.05% coating showed the best impermeable and corrosion protection performance compared to other coatings. Electrochemical impedance measurement (EIS) results showed that GP0.05% coating significantly exhibited the impermeable properties and corrosion protection performance. The protective mechanism of GO-PPy nanocomposites was attributed to passivation effect of conductive PPy and impermeable property of graphene oxide sheets. This work might provide a new candidate coating for metal protection through a facile, environmentally friendly method.

中文翻译：

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原位合成聚吡咯官能化氧化石墨烯的环氧树脂涂层可提高防腐性能

摘要 本工作介绍了一种原位聚合方法来合成用于水性环氧 (WEP) 涂料的纳米级添加剂。通过原位工艺合成聚吡咯官能化氧化石墨烯（GO-PPy），在氧化石墨烯（GO）表面上生长聚吡咯（PPy）薄膜。通过FI-TR、XRD、拉曼和FESEM技术对合成的纳米复合材料的结构和形貌进行了表征。将两种质量比的 GO-PPy 纳米复合材料掺入 WEP 涂层中，涂层的防腐性能得到明显改善。在纳米复合涂层中，与其他涂层相比，GP0.05%涂层表现出最好的防渗和防腐性能。电化学阻抗测量（EIS）结果表明GP0. 05%涂层显着表现出不渗透性能和防腐性能。GO-PPy 纳米复合材料的保护机制归因于导电 PPy 的钝化作用和氧化石墨烯片的不渗透性。这项工作可能通过一种简便、环保的方法为金属保护提供一种新的候选涂层。