The formation of core–shell structure is one of the standard methods to improve the corrosion resistance of carbonyl iron powders (CIPs). In this manuscript, epoxy resin (EP) was coated on the surface of flaky carbonyl iron particles (FCIPs) by a simple one-step polymerization method to form the FCIP@EP composite particles, and they were used to obtained microwave response to accurately simulate, predict and optimize the microwave absorption performance of composites. After being coated by epoxy resin, the composite exhibits a higher percolation threshold; the absorbing performance is more stable in an acidic environment. The optimal loading of FCIP@EP in the matrix can be obtained by data-driven optimization, and the model calculation results are in good agreement with the actual measured ones. At 23 vol%, the composite's effective absorption bandwidth (EAB, RL < −10 dB) can reach a maximum of 7.63 GHz at 1.5 mm thickness, and the EAB covers all X-band and all Ku-band at 1.9 mm and 1.4 mm, respectively. The whole optimization process provides a guiding basis for the modified corrosion-resistant absorbers in design applications.

核壳结构的形成是提高羰基铁粉（CIPs）耐腐蚀性能的标准方法之一。在这份手稿中，环氧树脂（EP）通过简单的一步聚合方法涂覆在片状羰基铁颗粒（FCIPs）表面形成FCIP@EP复合颗粒，并利用它们获得微波响应以准确模拟，预测和优化复合材料的微波吸收性能。经环氧树脂包覆后，复合材料表现出更高的渗透阈值；在酸性环境中吸收性能更稳定。FCIP@EP在矩阵中的最佳负载量可以通过数据驱动优化获得，模型计算结果与实测结果吻合较好。在 23 vol% 时，复合材料' s 有效吸收带宽 (EAB, RL < -10 dB) 在 1.5 mm 厚度下可达到最大 7.63 GHz，EAB 分别覆盖 1.9 mm 和 1.4 mm 的所有 X 波段和所有 Ku 波段。整个优化过程为改性耐腐蚀吸收器的设计应用提供了指导依据。