Dual-oxides confined carbonyl iron enabling superior electromagnetic wave absorption and anticorrosion performance

With the increasing requirements of electromagnetic wave (EMW) absorption, developing EMW absorbers with high-efficiency anti-corrosion performance which can be effectively applied in extreme corrosive environments is imperative and constitutes a hot issue in the current research. Herein, based on the composition modulation of ZrO 2 and SiO 2 layer, the dual-oxides confined carbonyl iron (CI@ZrO 2 /SiO 2 ) composite displays a minimum reflection loss ( RL min ) of −48.58 ​ [email protected]  ​mm and an effective absorption bandwidth (EAB) of 7.62 ​ [email protected]  ​mm. Besides, the CI@ZrO 2 /SiO 2 displays superior corrosion resistance with corrosion current density ( i corr ) of 8.62 ​× ​10 −7 A/cm 2 and polarization resistance ( R p ) of 3.64×10 5  ​Ω. This work proposes a strategy to optimize the broadband EMW absorption properties as well as the mass production toward the corrosion resistance applications.