Inhibiting pitting corrosion in carbon steel exposed to dilute radioactive waste slurries

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Dilute caustic high-level radioactive waste slurries can induce pitting corrosion in carbon steel. Cyclic potentiodynamic polarization tests were conducted in simulated and actual waste solutions to determine minimum concentrations of sodium nitrate which inhibit pitting in ASTM A537 class 1 steel exposed to these solutions. Susceptibility to pitting was assessed through microscopic inspection of specimens and inspection of polarization scans. Long-term coupon immersion tests were conducted to verify the nitrite concentrations established by the cyclic potentiodynamic polarization tests. The minimum effective nitrite concentration is expressed as a function of the waste nitrate concentration and temperature.

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14 pages

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Zapp, P. E. & Hobbs, D. T. January 1, 1991.

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Dilute caustic high-level radioactive waste slurries can induce pitting corrosion in carbon steel. Cyclic potentiodynamic polarization tests were conducted in simulated and actual waste solutions to determine minimum concentrations of sodium nitrate which inhibit pitting in ASTM A537 class 1 steel exposed to these solutions. Susceptibility to pitting was assessed through microscopic inspection of specimens and inspection of polarization scans. Long-term coupon immersion tests were conducted to verify the nitrite concentrations established by the cyclic potentiodynamic polarization tests. The minimum effective nitrite concentration is expressed as a function of the waste nitrate concentration and temperature.

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14 pages

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OSTI; NTIS; INIS; GPO Dep.

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  • Corrosion '92 conference and exhibition, Nashville, TN (United States), 27 Apr - 1 May 1992

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  • Other: DE92015334
  • Report No.: WSRC-MS-91-519
  • Report No.: CONF-920458--9
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 5306473
  • Archival Resource Key: ark:/67531/metadc1070289

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1991

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  • Feb. 4, 2018, 10:51 a.m.

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  • Nov. 5, 2020, 3:44 p.m.

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Zapp, P. E. & Hobbs, D. T. Inhibiting pitting corrosion in carbon steel exposed to dilute radioactive waste slurries, article, January 1, 1991; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1070289/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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