Abstract

Magnetic microwave absorbing (MA) materials applied under acidic conditions are prone to corrosion, leading to a gradual decrease in their MA performance. For this reason, it is meaningful to project an absorbing material with outstanding corrosion resistance. In this work, a core-shell anti-corrosion absorbing composite material, FeCo@TiO2@PPy-M16, was prepared by synergistic combination of FeCo alloy as the core material, conductive polymer PPy, semiconductor TiO2, and corrosion inhibitor M16. The results show that the composite material effectuates an effective absorption bandwidth (EAB) of 10.21 GHz at a thickness of 2.63 mm, demonstrating excellent MA performance. TiO2 and PPy also significantly improved corrosion resistance of FeCo, after soaking the composite coating in 3.5 wt% NaCl solution for 40 days, its low-frequency impedance modulus is 4.6 x 107 Omega cm2, the corrosion current density is 1.12 x 10- 8 A cm- 2, and the protection efficiency is 98.1 %, showing excellent corrosion resistance. It also indicates that M16 enhances corrosion resistance without affecting the MA performance. This work brings advanced inspiration for the research of excellent MA and anti-corrosion materials in practical applications.

Keywords Plus:GRAPHENE OXIDE NANOSHEETSCOMPOSITES

Published in JOURNAL OF COLLOID AND INTERFACE SCIENCE,Volume686;10.1016/j.jcis.2025.02.009,MAY 15 2025