• The thermal stability was significantly enhanced for the hybrid-coated Cip particles. • Magnetic saturation of the 2-MI and 2-MI/EPR-coated Cip was around 98 emu/g and 90 emu/g. • The corrosion rate (CR) for Cip@2-MI/EPR was decreased by 68.5% in comparison to Cip. Materials that exhibit magnetic microwave absorption (MA) are vulnerable to corrosion when liable to adverse environmental circumstances, including foggy, salty environments & high temperatures and humidity, leading to a performance drop in the material. Therefore, it is essential to develop composite coatings that maintain the material's stability while enhancing its absorption performance and anti-corrosion properties. In this study, carbonyl iron (CI) particles were encapsulated using 2-methylimidazole (2-MI) and Ly556-epoxy resin (EPR) via an in situ polymerization technique. The resultant powder composite properties, including magnetic stability, thermal stability, electromagnetic performance, and corrosion resistance, were evaluated. The Cip@2-MI/EPR sample, with -2.06 mm thickness, exhibits better electromagnetic (EM) absorption, with RL min of -63.16 ± 1.7 decibel (dB) at -13.17 GHz. Test results of the electrochemical experiments indicate that the corrosion potential (E corr ) shifted positively to -0.4669 V, while the corrosion current density (I corr ) lowered by a factor of ten. The thermogravimetric analysis (TGA) results indicate that a hybrid coating on the material's surface significantly enhances its thermal stability.
Arunkumar et al. (Fri,) studied this question.