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Hydrogen embrittlement in nickel-hydrogen cellsIt was long known that many strong metals can become weakened and brittle as the result of the accumulation of hydrogen within the metal. When the metal is stretched, it does not show normal ductile properties, but fractures prematurely. This problem can occur as the result of a hydrogen evolution reaction such as corrosion or electroplating, or due to hydrogen in the environment at the metal surface. High strength alloys such as steels are especially susceptible to hydrogen embrittlement. Nickel-hydrogen cells commonly use Inconel 718 alloy for the pressure container, and this also is susceptible to hydrogen embrittlement. Metals differ in their susceptibility to embrittlement. Hydrogen embrittlement in nickel-hydrogen cells is analyzed and the reasons why it may or may not occur are discussed. Although Inconel 718 can display hydrogen embrittlement, experience has not identified any problem with nickel-hydrogen cells. No hydrogen embrittlement problem is expected with the 718 alloy pressure container used in nickel-hydrogen cells.
Document ID
19890013637
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gross, Sidney
(Boeing Aerospace Co. Seattle, WA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Publication Information
Publication: NASA, Lewis Research Center, Space Electrochemical Research and Technology Conference: Abstracts
Subject Category
Energy Production And Conversion
Accession Number
89N23008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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