The electrochemical reaction and electrocrystallization of tungsten in NaCl-KCl-NaF-WO3 melts were investigated at 973K by using cyclic voltammetry, chronopotentiometry and chronoamperometry techniques. The results showed that the electrochemical reaction of tungsten in the NaCl-KCl-NaF-WO3 molten system was a quasi-reversible process controlled by ion diffusion and electron transport. The tungsten ion was reduced to W(0) in two stages. The electrocrystallization process of tungsten was found to be an instantaneous hemispheroid three-dimensional nucleation process and the tungsten ion diffusion coefficient was 2.361 x 10-4cm2/s.

Electrochemical Behavior of Tungsten in (NaCl-KCl-NaF-WO3) Molten Salt. J.Li, X.Y.Zhang, Y.B.Liu, Y.G.Li, R.P.Liu: Rare Metals, 2013, 32[5], 512-7