Masao Morishita, Momonori Murase and Koichiro Koyama
Faculty of Engineering, Himeji Institute of Technology, Himeji
The phase diagram of the LiCl-KCl-MgCl2 ternary system in low MgCl2 composition was determined by the hot thermo-couple method and the differential thermal analysis in order to find the molten salt electrolyte with a low melting temperature for deposition of magnesium on the zinc-plated steels. A ternary eutectic point, E, was found at 55 mol%LiCl-40 mol%KCl-5 mol%MgCl2 and 596 K which was 97 K lower than the melting point of zinc. Furthermore, a ternary peritecto-eutectic reaction was found at 9 mol%LiCl-63 mol%KCl-28 mol%MgCl2 and 675 K. Molten salt having the composition around the eutectic point, E, is expected to be a good candidate as the electrolytic bath for electrodeposition of magnesium on the zinc-plated steels.
(Received July 13, 1994)
phase diagram, LiCl-KCl-MgCl2, molten salt, hot thermo-couple method, electrodeposition of magnesium, zinc-plated steel
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