Adding organic-inorganic composite materials is a common way to improve the anti-corrosion performance of organic coatings. In this study, tannic acid as a bridge was first modified with the mica iron oxide, and then reacted with the carboxyl group on the surface of graphene oxide. Mica iron oxide @ tannic acid @ graphene oxide (α-Fe₂O₃@TA@GO) composite materials were prepared and characterized by infrared spectroscopy, x-ray diffractometer, x-ray photoelectron spectrometer, and scanning electron microscope. The modified products showed good dispersion stability in water, and the sedimentation time was increased from 3 h to 24 h. Composite materials were doped in waterborne epoxy modified acrylic to manufactured coatings. The electrochemical workstation was used to evaluate the corrosion performance of coatings. It was found that the corrosion resistance of the paint film could be greatly improved by adding composite materials characterized by Potentiodynamic polarization curves and EIS analysis. The optimal corrosion resistance can be obtained by adding 5wt% α-Fe₂O₃@TA@GO fillers. The corrosion current density (i_corr) was 1.459 μA/cm² and the charged transfer resistance (R_ct) was up to 14350 Ω cm², which was shown good potential as anti-corrosive fillers in coatings.

添加有机-无机复合材料是提高有机涂料防腐性能的常用方法。在这项研究中，单宁酸作为桥首先被云母氧化铁修饰，然后与氧化石墨烯表面的羧基反应。氧化物云母铁@鞣酸@石墨烯氧化物（的α-Fe ₂ ö ₃制备了复合材料，并通过红外光谱，X射线衍射仪，X射线光电子能谱仪和扫描电子显微镜对其进行了表征。改性产物在水中具有良好的分散稳定性，沉降时间从3 h增加到24 h。将复合材料掺入水性环氧改性丙烯酸中，制成人造涂料。电化学工作站用于评估涂层的腐蚀性能。发现通过添加具有电位动力学极化曲线和EIS分析特征的复合材料可以大大提高漆膜的耐腐蚀性。最佳的耐腐蚀性可通过加入5wt％的的α-Fe而获得₂ ö ₃ @ TA @ GO填料。腐蚀电流密度（i_corr）为1.459μA/ cm ²，带电传输电阻（R _ct）高达14350Ωcm ²，显示出在涂料中作为防腐填料的良好潜力。