Improved Interfacial Interactions by Core-Shell CoFeO@SiO Composites to Enhance the Ability of Corrosion Resistance and Electromagnetic Wave Absorption.

With the rapid development of science and technology, stealth and anti-corrosion activities in oceans have attracted widespread attention. This study successfully prepares CoFeO@SiO with a core-shell structure. This core-shell structure endows the CoFeO@SiO with good impedance matching and interfacial polarization. Thus, the CoFeO@SiO exhibits an excellent electromagnetic wave absorption performance with a minimum reflection loss of -45.16 dB. Moreover, the CoFeO@SiO exhibits an excellent dispersion ability in epoxy. The corrosion resistance of the CoFeO@SiO/epoxy is enhanced. After 60 days of immersion, the low-frequency impedance modulus of the CoFeO@SiO/epoxy is still >10 Ω cm. The CoFeO@SiO realize the dual functions of stealth and anti-corrosion, which provide ideas for developing marine stealth applications.