ABSTRACT Poor compatibility between sealing materials and fire extinguishing agents during prolonged contact can compromise system reliability. The compatibility of C 6 F 12 O with eight non‐metallic sealing materials was evaluated under compressed conditions. The results showed that compressive stress significantly exacerbates the degradation of sealing materials. Among the eight sealing materials, both Silicone Rubber (VMQ) and Nitrile Butadiene Rubber (NBR) exhibited severe degradation after 84 days of compatibility immersion in C 6 F 12 O under compression, characterized by significant swelling and mechanical properties loss. The coupling action between compressive stress and solvent permeation promoted the initiation and propagation of microcracks, which accelerated sealing material failure. In contrast, PP and PA66 remained stable throughout the entire experimental process, indicative of optimal candidates for long‐term sealing applications. These findings can provide valuable guidance on material selection and reliability assurance for C 6 F 12 O fire suppression systems, underscoring the need to involve compressive stress in sealing compatibility assessments.
Chen et al. (Tue,) studied this question.