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Use of Molten Salt Fluxes and Cathodic Protection for Preventing the Oxidation of Titanium at Elevated Temperatures

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Abstract

The current study demonstrates that it is possible to protect both solid and liquid titanium and titanium alloys from attack from air by cathodically polarizing the titanium component using an electro-active high-temperature molten salt flux and a moderate polarization potential. The electrolytic cell used comprises a cathode of either solid titanium or liquid titanium alloy, an electrolyte based on molten calcium chloride or fluoride salt, and an anode consisting of an inert oxygen-evolving material such as iridium metal. The new approach renders possible the processing of titanium at elevated temperatures in the presence of oxygen-containing atmospheres.

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Acknowledgment

The authors are grateful to the Office of Naval Research ONR for financial support through Grant Number N62909-10-1-7089, ACO N6297, ONRG LTR 7089.

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Authors and Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK

    Carsten Schwandt (Senior Research Fellow, Distinguished Visiting Fellow, National Chair Professor) & Derek J. Fray (Professor Emeritus and Director of Research)

  2. Department of Materials Science and Metallurgy, University of Nizwa, Nizwa, Sultanate of Oman

    Carsten Schwandt (Senior Research Fellow, Distinguished Visiting Fellow, National Chair Professor)

Authors
  1. Carsten Schwandt
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  2. Derek J. Fray
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Correspondence to Carsten Schwandt.

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Manuscript submitted January 28, 2014.

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Schwandt, C., Fray, D.J. Use of Molten Salt Fluxes and Cathodic Protection for Preventing the Oxidation of Titanium at Elevated Temperatures. Metall Mater Trans B 45, 2145–2152 (2014). https://doi.org/10.1007/s11663-014-0134-8

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