<p>Heat storage materials are considered promising to improve the catalytic ignition of non-toxic monopropellant thrusters when applied to the preheating structure of thrusters. In this work, the concept of utilizing metal-based phase-change materials as heat bed materials for thrusters was proposed. The compatibility of heat storage materials (Pb and Bi) with the encapsulation material (oxide dispersion strengthened steel) was studied at 1200&#xa0;°C, and the test duration was up to 30 minutes. Results showed that the dissolution corrosion behavior in the ND plane and RD plane of ODS steel was identified. The uniform corrosion rate in the ND plane was roughly equivalent to that in the RD plane, and the corrosion rate in Bi was approximately 6 to 7 times that of Pb. Severe pitting in the form of a tortuous single channel was identified in the RD plane. A sizable Cr depletion zone was found in the dissolved ODS steel, but no discernible change was found in the microstructure of the Cr depletion zone compared with that of the matrix region. In addition, α-Fe ligaments enriched with W were observed after the dissolution of ODS steel in Bi, and fine Fe₂W ligaments were connected at the top of α-Fe ligaments. The composition, structure, and phase progression of the ligaments were discussed from bottom to top.</p>