Combining the advantages of solvent-based and water-based anticorrosive coatings, a waterborne composite dispersion of hydroxy acrylic resin (HAR) and modified graphene oxide (MGO) was prepared for application as an anticorrosive coating. MGO was obtained using 3-aminopropyltriethoxysilane as the coupling agent to introduce NH₂ groups onto the graphene surface. HAR with COOH, OH and epoxy groups was prepared at a high solid content of up to 80% through solution copolymerization using methacrylic acid, hydroxyethyl methacrylate, methyl methacrylate, n-butyl acrylate and styrene as monomers, tert-butyl peroxybenzoate as the initiator, and propanediol butyl ether and dimethylbenzene as solvents. The covalent bonds between NH₂ and epoxy groups would be formed after blending MGO dispersion and the neutralized HAR to improve its compatibility. The effect of dosage of MGO on the viscosity of water-dispersion of HAR (WHAR), and the hardness, adhesion, contact angle of film formed by WHAR, and the anticorrosive performance of the composite coatings were investigated in detail. Results showed that the more MGO added, the higher viscosity of WHAR-MGO. A small amount of MGO formed a barrier layer after being evenly distributed in the coatings, but excessive MGO agglomerated, thereby reducing the compatibility. Composite coatings with 0.25% MGO had the best corrosion performance in 3.0 wt% NaCl aqueous solution, and the |Z|_0.01Hz was 10–20 times higher than other coatings with or without MGO, and the I_corr was 10 times lower than coating without MGO. This work provides a good way to balance the environmental issue of organic solvent emission and corrosive properties of water-borne polyacrylate coatings.

结合溶剂型和水性防腐涂料的优点，制备了羟基丙烯酸树脂（HAR）和改性氧化石墨烯（MGO）的水性复合分散体，用作防腐涂料。使用3-氨基丙基三乙氧基硅烷作为偶联剂将NH ₂基团引入到石墨烯表面上获得MGO 。以甲基丙烯酸、甲基丙烯酸羟乙酯、甲基丙烯酸甲酯、丙烯酸正丁酯和苯乙烯为单体，过苯甲酸叔丁酯为引发剂，通过溶液共聚制备了具有COOH、OH和环氧基的高固含量高达80%的HAR ，以丙二醇丁醚和二甲苯为溶剂。NH ₂之间的共价键MGO 分散体与中和后的 HAR 混合后会形成环氧基团，以提高其相容性。详细研究了MGO用量对HAR(WHAR)水分散体粘度的影响，以及对WHAR成膜的硬度、附着力、接触角和复合涂层防腐性能的影响。结果表明，加入的 MGO 越多，WHAR-MGO 的粘度越高。少量的 MGO 均匀分布在涂层中后形成阻隔层，但过量的 MGO 会结块，从而降低相容性。含 0.25% MGO 的复合涂层在 3.0 wt% NaCl 水溶液中的腐蚀性能最好，|Z| _0.01Hz比其他含或不含 MGO 的涂层高 10-20 倍，并且 I _corr比不含 MGO 的涂层低 10 倍。这项工作为平衡水性聚丙烯酸酯涂料的有机溶剂排放和腐蚀性能的环境问题提供了一种很好的方法。