Electrochemical Testing of Gas Tungsten Arc Welded and Reduced Pressure Electron Beam Welded Alloy 22

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Alloy 22 (N06022) is the material selected for the fabrication of the outer shell of the nuclear waste containers for the Yucca Mountain high-level nuclear waste repository site. A key technical issue in the waste package program has been the integrity of the container weld joints. The currently selected welding process for fabricating and sealing the containers is the traditional gas tungsten arc welding (GTAW) or TIG method. An appealing faster alternative technique is reduced pressure electron beam (RPEB) welding. It was of interest to compare the corrosion properties of specimens prepared using both types of welding techniques. Standard electrochemical ... continued below

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Day, S D; Wong, F G; Gordon, S R; Wong, L L & Rebak, R B February 5, 2006.

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Description

Alloy 22 (N06022) is the material selected for the fabrication of the outer shell of the nuclear waste containers for the Yucca Mountain high-level nuclear waste repository site. A key technical issue in the waste package program has been the integrity of the container weld joints. The currently selected welding process for fabricating and sealing the containers is the traditional gas tungsten arc welding (GTAW) or TIG method. An appealing faster alternative technique is reduced pressure electron beam (RPEB) welding. It was of interest to compare the corrosion properties of specimens prepared using both types of welding techniques. Standard electrochemical tests were carried on GTAW and RPEB welds as well as on base metal (non-welded) to determine their relative corrosion behavior in simulated concentrated water (SCW) at 90 C (alkaline), 1 M HCl at 60 C (acidic) and 1 M NaCl at 90 C (neutral) solutions. Results show that for all practical purposes, the three tested materials had the same electrochemical behavior in the three tested electrolytes.

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PDF-file: 13 pages; size: 1 Mbytes

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  • Presented at: 2006 ASME Pressure Vessels and Piping Conference, Vancouver, Canada, Jul 23 - Jul 27, 2006

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  • Report No.: UCRL-PROC-218715
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 894774
  • Archival Resource Key: ark:/67531/metadc888448

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 5, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 23, 2016, 5:47 p.m.

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Day, S D; Wong, F G; Gordon, S R; Wong, L L & Rebak, R B. Electrochemical Testing of Gas Tungsten Arc Welded and Reduced Pressure Electron Beam Welded Alloy 22, article, February 5, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc888448/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.