The Effectiveness of Oxygen in Preventing Embrittlement in Air Bag Inflators Containing Gaseous Hydrogen 2006-01-1188
This study examines the effectiveness of gaseous oxygen at preventing embrittlement in steel associated with exposure to gaseous hydrogen under static loading conditions. Notched C-ring samples machined from 4340 steel and heat treated to HRC 51-53 were used to test the neutrality of an oxygen-hydrogen gas mixture similar to that which may be used as a generant in an air bag inflator. The 29 percent oxygen to hydrogen gas ratio of the gas mixture was found to be sufficient to protect the steel from hydrogen embrittlement under static loading conditions. This would indicate that any steel with a hardness of HRC 51 or lower would be safe to use in gas-based air bag inflators containing a oxygen to hydrogen gas ratio of 29 percent or higher.
Citation: Basner, T. and Woods, C., "The Effectiveness of Oxygen in Preventing Embrittlement in Air Bag Inflators Containing Gaseous Hydrogen," SAE Technical Paper 2006-01-1188, 2006, https://doi.org/10.4271/2006-01-1188. Download Citation
Author(s):
Timothy G. Basner, Charles M. Woods
Affiliated:
Delphi Corporation, Global Manufacturing Solutions
Pages: 5
Event:
SAE 2006 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Air Bags and Occupant Restraints-SP-1994, SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems-V115-6
Related Topics:
Airbag systems
Heat treatment
Hydrogen fuel
Gases
Oxygen
Steel
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
