Electrochemical Deoxidation of Titanium and Its Alloy Using Molten Magnesium Chloride

Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl 2 at 1173 K (900 °C), where the metal being refined was the cathode and a graphite rod was used as the anode. By applying a voltage of approximately 3 V between the electrodes, commercially pure titan...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2016-12, Vol.47 (6), p.3394-3404
Main Authors: Taninouchi, Yu-ki, Hamanaka, Yuki, Okabe, Toru H.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Deoxidizing
Electrodes
Feasibility studies
Magnesium composites
Materials Science
Metallic Materials
Metallurgy
Nanotechnology
Oxygen
Process metallurgy
Structural Materials
Surfaces and Interfaces
Thin Films
Titanium
Titanium alloys
Titanium base alloys
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Summary:Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl 2 at 1173 K (900 °C), where the metal being refined was the cathode and a graphite rod was used as the anode. By applying a voltage of approximately 3 V between the electrodes, commercially pure titanium, containing 1200 mass ppm oxygen, and the Ti-6Al-4V alloy, containing 1400 mass ppm oxygen, were deoxidized to 500 mass ppm or less. Under certain conditions, extra-low-oxygen titanium (as low as 80 mass ppm oxygen) was obtained using this electrochemical technique. The results obtained in this study indicate that the electrochemical deoxidation of titanium in molten MgCl 2 is feasible and applicable not only to the refinement of primary metals, but also for upgrading machined titanium products and recycling metal scraps.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-016-0792-9