Fastener joint and associated method for avoiding corrosion of dissimilar material fastener joints

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11808297
APP PUB NO 20220243749A1
SERIAL NO

17162147

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A fastener for use in joining dissimilar materials manufactured by the process of producing the fastener with an external surface that forms an electrically insulating oxide layer when subjected to oxidation and, after manufacture and prior to use, subjecting the fastener to a pre-oxidation process to grow the desired oxide layer in situ on the external surface of the fastener. The present invention also provides a dissimilar material joint in which the pre-oxidized fastener is used to mechanically join dissimilar materials with the oxide layer electrically insulating the fastener from at least one of the dissimilar materials. The fastener may be a rivet used in friction self-piercing riveting (F-SPR). The fastener may be fabricated from an alloy capable of forming Al2O3 or Cr2O3 by thermal oxidation. The fastener may be pre-coated with Al or Cr that functions as a seed layer to form Al2O3 or Cr2O3.

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Patent Owner(s)

Patent OwnerAddress
UT-BATTELLE LLCONE BETHEL VALLEY ROAD 5002 MS-6265 OAK RIDGE TN 37831

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brady, Michael P Oak Ridge, US 29 213
Feng, Zhili Oak Ridge, US 27 131
Jun, Ji Heon Oak Ridge, US 3 1
Lim, Yong Chae Oak Ridge, US 5 1

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