Electrochemical Deoxidation of Titanium and Its Alloy Using Molten Magnesium Chloride

Yu ki Taninouchi; Yuki Hamanaka; Toru H. Okabe

doi:10.1007/s11663-016-0792-9

Electrochemical Deoxidation of Titanium and Its Alloy Using Molten Magnesium Chloride

Yu ki Taninouchi, Yuki Hamanaka, Toru H. Okabe

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl₂ 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 MgCl₂ is feasible and applicable not only to the refinement of primary metals, but also for upgrading machined titanium products and recycling metal scraps.

Original language	English
Pages (from-to)	3394-3404
Number of pages	11
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	47
Issue number	6
DOIs	https://doi.org/10.1007/s11663-016-0792-9
Publication status	Published - Dec 1 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/s11663-016-0792-9

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abstract = "Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl2 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 MgCl2 is feasible and applicable not only to the refinement of primary metals, but also for upgrading machined titanium products and recycling metal scraps.",

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AU - Hamanaka, Yuki

AU - Okabe, Toru H.

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N2 - Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl2 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 MgCl2 is feasible and applicable not only to the refinement of primary metals, but also for upgrading machined titanium products and recycling metal scraps.

AB - Oxygen was directly removed from pure titanium and a Ti-6Al-4V alloy by electrolysis in molten MgCl2 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 MgCl2 is feasible and applicable not only to the refinement of primary metals, but also for upgrading machined titanium products and recycling metal scraps.

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