Fuel Cell Elastomeric Materials Oxygen Compatibility Testing: Effect of 450 and 6200 kPa Oxygen

JM Waller; SD Hornung; HD Beeson

doi:10.1520/STP12066S

SYMPOSIA PAPER Published: 01 January 1997

STP12066S

Fuel Cell Elastomeric Materials Oxygen Compatibility Testing: Effect of 450 and 6200 kPa Oxygen

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The oxygen compatibility of five O-ring formulations used in the Space Shuttle oxygen/hydrogen (O₂/H₂) fuel cell was evaluated following exposure to 450 and 6200 kPa (65 and 900 psi) oxygen at 121 °C (250 °F) for 48 h. The elastomers tested were Neoprene compound C873-70, and four fluoroelastomers: Aflas® 7182D, Kalrez® 1045, Fluorel® 2180, and compound V884-75. Post-aging changes in mass, dimension, tensile strength, elongation at break, durometer hardness, and compression set were determined for each elastomer. Aging results were compared to ignition and combustion data, namely the autogenous ignition temperature (AIT) and heat of combustion (ΔH_c). Finally, the possibility of heterogeneous oxidation is discussed.

Author Information

Waller, JM

AlliedSignal Technical Services Corp. Team, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

Hornung, SD

AlliedSignal Technical Services Corp. Team, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

Beeson, HD

NASA Laboratories Office, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

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Developed by Committee: G04

Pages: 385–402

DOI: 10.1520/STP12066S

ISBN-EB: 978-0-8031-5372-1

ISBN-13: 978-0-8031-2401-1

Fuel Cell Elastomeric Materials Oxygen Compatibility Testing: Effect of 450 and 6200 kPa Oxygen

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