Determination of surface oxide compositions on Alloy 600 using Rutherford backscattering

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The surface composition of oxides formed on Alloy 600 under conditions similar to those in the primary side of PWR heat exchangers has been studied as a function of potential using Rutherford backscattering and proton inelastic scattering. Electropolished samples of Alloy 600 were exposed at several potentials to a solution of 0.18M H/sub 3/BO/sub 3/(2000 ppM B) with 0.28M LiOH (1.4 ppM Li) at 300/sup 0/C for 450 hours. The potentials relative to an internal hydrogen electrode ranged from -.09 to 750 mV. RBS analysis showed little or no oxide formation on samples exposed at 0 mV. Above 0 mV ... continued below

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Pages: 18

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Hanson, A.L.; Isaacs, H.S. & Kraner, H.W. January 1, 1984.

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Description

The surface composition of oxides formed on Alloy 600 under conditions similar to those in the primary side of PWR heat exchangers has been studied as a function of potential using Rutherford backscattering and proton inelastic scattering. Electropolished samples of Alloy 600 were exposed at several potentials to a solution of 0.18M H/sub 3/BO/sub 3/(2000 ppM B) with 0.28M LiOH (1.4 ppM Li) at 300/sup 0/C for 450 hours. The potentials relative to an internal hydrogen electrode ranged from -.09 to 750 mV. RBS analysis showed little or no oxide formation on samples exposed at 0 mV. Above 0 mV oxide layers formed whose thicknesses increased with potential. In addition the RBS showed a significantly enhanced concentration of aluminum and silicon in oxide. Both the oxygen and the sum of the aluminum and silicon content appeared to maintain a fixed surface concentration independent of the oxide thickness. Boron and lithium concentration were analyzed with proton inelastic scattering. No lithium was found in any sample. The boron concentration was found to follow the thickness of the oxide.

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Pages: 18

Notes

NTIS, PC A02/MF A01.

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  • NACE corrosion '84 international forum and exhibition, New Orleans, LA, USA, 1 Apr 1984

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  • Other: DE84002872
  • Report No.: BNL-33830
  • Report No.: CONF-840405-5
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5245117
  • Archival Resource Key: ark:/67531/metadc1068279

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1984

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 24, 2018, 11:55 a.m.

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Hanson, A.L.; Isaacs, H.S. & Kraner, H.W. Determination of surface oxide compositions on Alloy 600 using Rutherford backscattering, article, January 1, 1984; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1068279/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.