Corrosion studies of titanium in borated water for TPX

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Corrosion testing was performed to demonstrate the compatibility of the titanium vacuum vessel with borated water. Borated water is proposed to fill the annulus of the double wall vacuum vessel to provide effective radiation shielding. Borating the water with 110 grams of boric acid per liter is sufficient to reduce the nuclear heating in the Toroidal Field Coil set and limit the activation of components external to the vacuum vessel. Constant extension rate tensile (CERT) and electrochemical potentiodynamic tests were performed. Results of the CERT tests confirm that stress corrosion cracking is not significant for Ti-6Al4V or Ti-3AI-2.5V. Welded and ... continued below

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5 p.

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Wilson, D.F.; Pawel, S.J.; DeVan, J.H.; Cole, M.J. & Nelson, B.E. December 31, 1995.

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Description

Corrosion testing was performed to demonstrate the compatibility of the titanium vacuum vessel with borated water. Borated water is proposed to fill the annulus of the double wall vacuum vessel to provide effective radiation shielding. Borating the water with 110 grams of boric acid per liter is sufficient to reduce the nuclear heating in the Toroidal Field Coil set and limit the activation of components external to the vacuum vessel. Constant extension rate tensile (CERT) and electrochemical potentiodynamic tests were performed. Results of the CERT tests confirm that stress corrosion cracking is not significant for Ti-6Al4V or Ti-3AI-2.5V. Welded and unwelded specimens were tested in air and in borated water at 150{degree}C. Strength, elongation, and time to failure were nearly identical for all test conditions, and all the samples exhibited ductile failure. Potentiodynamic tests on Ti-6A1-4V and Ti in borated water as a function of temperature showed low corrosion rates over a wide passive potential range. Further, this passivity appeared stable to anodic potentials substantially greater than those expected from MHD effects.

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5 p.

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INIS; OSTI as DE96005552

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  • 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 1-5 Oct 1995

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  • Other: DE96005552
  • Report No.: CONF-950905--32
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 205160
  • Archival Resource Key: ark:/67531/metadc672294

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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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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 21, 2016, 7:08 p.m.

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Wilson, D.F.; Pawel, S.J.; DeVan, J.H.; Cole, M.J. & Nelson, B.E. Corrosion studies of titanium in borated water for TPX, article, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc672294/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.