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Hydrogen outgassing considerations for an orbiting aluminum molecular shieldA molecular shield and associated hardware made of pure aluminum is shown to have an outgassing rate sufficiently low so that operations in orbit would undergo less density contributions than that present from the upper atmospheric atomic hydrogen contribution. Measurements of the atomic hydrogen outgassing from baked-out 6061 aluminum cylindrical samples 3 mm thick are demonstrated to be less than 1/100 trillion l/sec per sq cm, comparable to that of austenitic stainless steels. Calculations of the density distribution with a hemispherical molecular shield are presented, and the elimination of porosity in the aluminum shells is recommended by means of vacuum melting.
Document ID
19820043311
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Outlaw, R. A.
(NASA Langley Research Center Space Systems Div., Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Journal of Spacecraft and Rockets
Volume: 19
Subject Category
Inorganic And Physical Chemistry
Accession Number
82A26846
Distribution Limits
Public
Copyright
Other

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