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Co-deposition of Al-Cr-Ni alloys using constant potential and potential pulse techniques in AlCl3-NaCl-KCl molten salt
Title: | Co-deposition of Al-Cr-Ni alloys using constant potential and potential pulse techniques in AlCl3-NaCl-KCl molten salt |
Authors: | Ueda, Mikito Browse this author →KAKEN DB | Kigawa, Hirokuni Browse this author | Ohtsuka, Toshiaki Browse this author →KAKEN DB |
Keywords: | Molten salt | Co-deposition | Aluminum alloy | Electroplating | Pulse electrolysis |
Issue Date: | 1-Feb-2007 |
Publisher: | Elsevier |
Journal Title: | Electrochimica Acta |
Volume: | 52 |
Issue: | 7 |
Start Page: | 2515 |
End Page: | 2519 |
Publisher DOI: | 10.1016/j.electacta.2006.09.001 |
Abstract: | To improve the oxidation resistance of TiAl intermetallic compound under high temperature condition, cathodic co-deposition of Al-Cr and Al-Ni alloy was carried out by constant potential control or potential pulse control in AlCl3-NaCl-KCl molten salt containing CrCl2 and/ or NiCl2 at 423 K. Cathodic reduction of Ni and Cr starts at potential of 0.8 and 0.15 V vs. Al/Al3+ in the molten salt, respectively. The co-deposition of Al, Cr, and Ni occurred at potentials more negative than -0.1 V to form a mixture of intermetallic compounds of Cr2Al, Ni3Al, and Al3Ni. Concentration of Cr in the deposit was enhanced to 43 at% at –0.1V; however, concentration of Ni in the deposit was 6 at% at the same potential. The concentration of Ni further decreased with more negative potential to 1 at% at -0.4 V. The potential pulse technique enhanced the Ni concentration in the deposit to about 30 at%, due to anodic dissolution of Al content from the deposit at the higher side of potential on the potential pulse electrolysis. |
Relation: | http://www.sciencedirect.com/science/journal/00134686 |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/20439 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 上田 幹人
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