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Alternating-Polarity Arc WeldingBrief reversing polarity of welding current greatly improves quality of welds. NASA technical memorandum recounts progress in art of variable-polarity plasma-arc (VPPA) welding, with emphasis on welding of aluminum-alloy tanks. VPPA welders offer important advantages over conventional single-polarity gas/tungsten arc welders.
Document ID
19870000367
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Schwinghamer, R. J.
(NASA Marshall Space Flight Center, Huntsville, Ala.)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 7
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-27147
Accession Number
87B10367
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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