Characterization of celotex and thermodynamic calculations of the formation of corrosion precursors on beryllium

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The importance of safe and long-term storage of nuclear weapons components has drawn attention towards the characterization and understanding of the corrosion precursors formed on beryllium. A complete compositional and thermal characterization of celotex was carried out using energy dispersive spectroscopy, inductively coupled plasma-mass spectroscopic analysis, ion chromatography, and thermogravimetric analysis. Both fluoride and sulfate anions in addition to chloride as well as several metal ions are found to be present. The chloride present in celotex is lost at moderate temperatures 200 < T < 400 C, which may have important consequences on the formation of corrosion precursors. Equilibrium thermodynamic ... continued below

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20 p.

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Diaz-Ortiz, A.; Stolk, J.; Kim, J.; Sanchez, J.M. & Manthiram, A. April 1, 1999.

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Description

The importance of safe and long-term storage of nuclear weapons components has drawn attention towards the characterization and understanding of the corrosion precursors formed on beryllium. A complete compositional and thermal characterization of celotex was carried out using energy dispersive spectroscopy, inductively coupled plasma-mass spectroscopic analysis, ion chromatography, and thermogravimetric analysis. Both fluoride and sulfate anions in addition to chloride as well as several metal ions are found to be present. The chloride present in celotex is lost at moderate temperatures 200 < T < 400 C, which may have important consequences on the formation of corrosion precursors. Equilibrium thermodynamic calculations on the stability of beryllium oxide in chlorinated environments were performed for a model system composed by beryllium, carbon, chlorine, hydrogen and oxygen. The calculations were aimed at describing the equilibrium, long-term behavior of a beryllium surface and its interaction with chlorine in a closed environment. The authors found that (i) carbon is essential for the formation of BeCl{sub 2}, and (ii) the chlorine-to-hydrogen ratio in chlorinated solvents is an important quantity since for solvents with chlorine-to-hydrogen ratio higher than 1, BeCl{sub 2} is not formed independently of the amount of solvent.

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20 p.

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OSTI as DE99002208

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  • Other Information: PBD: Apr 1999

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  • Other: DE99002208
  • Report No.: ANRCP--1999-16
  • Grant Number: FC04-95AL85832
  • DOI: 10.2172/334202 | External Link
  • Office of Scientific & Technical Information Report Number: 334202
  • Archival Resource Key: ark:/67531/metadc675279

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  • April 1, 1999

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 19, 2015, 12:18 p.m.

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Diaz-Ortiz, A.; Stolk, J.; Kim, J.; Sanchez, J.M. & Manthiram, A. Characterization of celotex and thermodynamic calculations of the formation of corrosion precursors on beryllium, report, April 1, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc675279/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.