Graphene material has been used as a superior protection barrier for metal surface due to its excellent impermeability to corrosive electrolyte. However, it is not satisfactory for long-term corrosion resistance of graphene, which has a tendency to agglomerate in the resin coating. In this study, a novel anticorrosion filler was fabricated by sulfonated graphene (GS) sheets wrapping sulfonate‑barium (BS) nanoparticles. The composite material (BS@GS) exhibited a flake-like structure with numerous BS nanoparticles (particle size of 20–50 nm) on the sheet surface. The introduction of BS@GS filler in epoxy resin coating could significantly enhance corrosion resistance of carbon steel. For instance, when added only 4 wt% of BS@GS filler, the impedance modulus at 0.01 Hz of composite coating was still maintained as 1.576 × 10⁵ Ω cm² after immersion in NaCl solution for 168 h, about 2 orders of magnitude higher than pristine resin coating. It demonstrated that this work developed an effective strategy to achieve long-term anticorrosion application for the graphene material.

石墨烯材料由于其对腐蚀性电解质的优异抗渗性，已被用作金属表面的卓越保护屏障。然而，石墨烯的长期耐腐蚀性并不令人满意，石墨烯在树脂涂层中具有团聚的趋势。在这项研究中，通过包裹磺酸钡 (BS) 纳米颗粒的磺化石墨烯 (GS) 片制造了一种新型防腐填料。复合材料（BS@GS）在片材表面呈现出片状结构，具有大量BS纳米颗粒（粒径为20-50 nm）。在环氧树脂涂层中引入BS@GS填料可以显着提高碳钢的耐腐蚀性能。例如，当仅添加 4 wt% 的 BS@GS 填料时，复合涂层在 0.01 Hz 时的阻抗模量仍保持为 1.576 × 10 ⁵浸入 NaCl 溶液 168 小时后的Ω cm ²，比原始树脂涂层高约 2 个数量级。这表明这项工作开发了一种有效的策略来实现石墨烯材料的长期防腐应用。