Corrosion Behavior for Sealing Polymer Materials under Simulated Condition for High-Pressure Proton Exchange Membrane Water Electrolysis

Sealing is a core factor for the safe operation of high-pressure proton exchange membrane electrolysis cells(PEMECs).To investigate the corrosion behavior of sealing polymer materials，two experimental methods were established: an accelerated high-temperature evaluation(100 ℃ acidic environment with H2 or O2 for 100 h) and a long-term high-pressure evaluation(80 ℃ acidic environment with 6－7 MPa H2 or O2 for 1 000 h)，to evaluate the corrosion behavior of five sealing polymer materials.Results showed that ethylene-propylene-diene monomer(EPDM) and fluoroelastomer(FKM) had chemical degradation and localized corrosion.In contrast，polyimide(PI)，polyetheretherketone(PEEK) and polytetrafluoroethylene(PTFE) had low corrosion rates and showed uniform corrosion characteristics.Specifically，PTFE showed excellent corrosion resistance，and its composite structure may help address corrosion and assembly issues in high-pressure PEMEC systems.

# Materials of engineering and construction. Mechanics of materials # Technology # polymer material；sealing；corrosion；proton exchange membrane water electrolysis；high-temperature and high-pressure

PENG Heng, DONG Minghui, ZHANG Maoqi, BAI Mingxian, GUO Jianwei (2026). "Corrosion Behavior for Sealing Polymer Materials under Simulated Condition for High-Pressure Proton Exchange Membrane Water Electrolysis". Cailiao Baohu. https://doi.org/10.16577/j.issn.1001-1560.2026.0015