Abstract Large CeO2 nanoflakes in diameter of 3∼5 μm were used as barriers in waterborne acrylic coating to improve the anticorrosion. Meanwhile, graphene (Gr) was adopted to modify the CeO2 nanoflakes which were linked by bifunctional ligand p-aminobenzoic acid (PABA), forming a more efficient barrier Gr-P-CeO2. The electrochemical test indicated that the acrylic coating using Gr-P-CeO2 as barrier improved the anticorrosion performance obviously when compared with the coatings using pure Gr, pure CeO2 nanoflake, and the Gr-CeO2 without PABA linking. The composite coating with Gr(3%)-P-CeO2 had a corrosion current (icorr) of 2.29 × 10−7 A/cm2, and coating resistance(Rc) was 3.53 × 103 Ωcm2. The best icorr was almost 53 times lower of CeO2 coating, and 48 times lower of Gr-CeO2 coating.

中文翻译：

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由石墨烯改性的大型 CeO2 纳米薄片作为水性丙烯酸涂料中的屏障和改善的防腐性能

摘要 在水性丙烯酸涂料中使用直径为3~5 μm的大CeO2纳米薄片作为阻隔层以提高防腐性能。同时，采用石墨烯（Gr）修饰由双功能配体对氨基苯甲酸（PABA）连接的CeO2纳米薄片，形成更有效的屏障Gr-P-CeO2。电化学测试表明，与使用纯Gr、纯CeO2纳米薄片和没有PABA连接的Gr-CeO2涂层相比，以Gr-P-CeO2为屏障的丙烯酸涂层的防腐性能明显提高。Gr(3%)-P-CeO2 复合涂层的腐蚀电流 (icorr) 为 2.29 × 10−7 A/cm2，涂层电阻 (Rc) 为 3.53 × 103 Ωcm2。最佳 icorr 几乎比 CeO2 涂层低 53 倍，比 Gr-CeO2 涂层低 48 倍。