▎ 摘　　要

Large CeO2 nanoflakes in diameter of 3 similar to 5 mu m 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 (i(corr)) of 2.29x10(-7) A/cm(2), and coating resistance(R-c) was 3.53x10(3) Omega cm(2). The best i(corr) was almost 53 times lower of CeO2 coating, and 48 times lower of Gr-CeO2 coating.