Study on electrical removal of aluminum from Ti-Al alloys in low-temperature molten salt

Xu Peidong; Tan Min; Li Tao; Gao Aimin; Xin Zhaoyang; Liu Wei; Gu Shaopeng

doi:10.7513/j.issn.1004-7638.2023.04.012

Volume 44 Issue 4

Aug. 2023

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Xu Peidong, Tan Min, Li Tao, Gao Aimin, Xin Zhaoyang, Liu Wei, Gu Shaopeng. Study on electrical removal of aluminum from Ti-Al alloys in low-temperature molten salt[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 78-84. doi: 10.7513/j.issn.1004-7638.2023.04.012

Citation:

Xu Peidong, Tan Min, Li Tao, Gao Aimin, Xin Zhaoyang, Liu Wei, Gu Shaopeng. Study on electrical removal of aluminum from Ti-Al alloys in low-temperature molten salt[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 78-84. doi: 10.7513/j.issn.1004-7638.2023.04.012

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Study on electrical removal of aluminum from Ti-Al alloys in low-temperature molten salt

doi: 10.7513/j.issn.1004-7638.2023.04.012

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China

Received Date: 2022-12-26
Publish Date: 2023-08-30

Abstract

Abstract

In order to realize the secondary recycling and separation of Al-Ti alloys, the dealloying of Al-Ti alloys was studied with 1-butyl-3-methyl imidazolium chloride (BMIC)-aluminum chloride (AlCl₃) as the electrolyte and Ti-Al alloys as the sacrificial anode. Cyclic voltammetry, potentiodynamic polarization method, and potentiostatic polarization method were performed to analyze the dealloying behavior during electrolysis. SEM-EDS was used to characterize the micromorphology of the samples before and after electrolysis. The Al content in the Ti-Al alloy samples was quantified by ICP-AES. The results showed that the dealloying reaction of Ti-Al alloy in BMIC-AlCl₃ is quasi-reversible. The current remains stable during the long-time electrolysis, indicating that the electrolytic dealloying could be achieved continuously. The cathodic deposition layer was found to be metallic aluminum with high purity and porous structure by scanning electron microscopy. The content of Al in titanium aluminum alloy after electrolysis decreased by 10.67% compared with that before electrolysis based on the ICP-AES analysis.
- titanium aluminum alloy,
- ionic liquid,
- dealloying,
- electrochemical analysis,
- aluminum content

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References(21)

References

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