Electrochemical studies of zirconium and hafnium in alkali chloride and alkali fluoride-chloride molten salts

@article{GuangSen1990ElectrochemicalSO,
  title={Electrochemical studies of zirconium and hafnium in alkali chloride and alkali fluoride-chloride molten salts},
  author={C. Guang-Sen and M. Okido and T. Oki},
  journal={Journal of Applied Electrochemistry},
  year={1990},
  volume={20},
  pages={77-84}
}
The electrochemical reduction of zirconium and hafnium in alkali chloride or fluoride-chloride molten salts on platinum electrodes has been investigated by means of linear and cyclic voltammetry. It has been found that fluoride ions greatly influenced the reduction of zirconium and hafnium in fluoride-chloride melts. It has been proposed that the mechanism for reduction of zirconium and hafnium in baths containing a low concentration of fluoride compounds is different from the mechanism in… Expand
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References

SHOWING 1-10 OF 10 REFERENCES
Electrorefining of Zirconium Metal in Alkali Chloride and Alkali Fluoride Fused Electrolytes
The electrorefining of zirconium metal in alkali halide melts has been investigated. Variables affecting the electrodeposition process such as the composition of the electrolyte, the current density,Expand
Cathodic processes at electrolysis of chloride and chloride-fluoride melts of zirconium
Abstract Electrochemical reduction of zirconium from the NaClKClZrCl 4 molten mixture proceeds reversibly in two consequent steps: With addition of sodium fluoride into the NaClKClZrCl 4 melt andExpand
Electrochemical reduction of ZrCl4 in molten NaCl, CsCl and KCl-LiCl and chemical reactions coupled to the electrodeposition of zirconium
Cyclic voltammetry is used to study the reduction of ZrCl4 in molten NaCl, KCl-LiCl or CsCl and the nature of the various electrochemical processes. The chemical reactions between Zr metal and theExpand
Electrochemical studies of titanium ions (Ti4+) in equimolar KClNaCl molten salts with 1 wt% K2TiF6
Abstract The electrochemical reduction of Ti4+ ions in equimolar KClNaCl melts containing less K2TiF6 (1wt%) on a Pt electrode, was studied at 973 K by means of linear sweep voltammetry, stationaryExpand
Electrochemical studies of the reaction between titanium metal and titanium ions in the KCl-NaCl molten salt system at 973 K
AbstractThe reaction between titanium metal and titanium ions in the KCl−NaCl molten salt system was investigated by means of electrochemical and physical methods at 973 K in an inert gas atmosphereExpand
Equilibrium decomposition pressures of the compounds Cs2ZrCl6 and Cs2HfCl6 and X-ray identification of Na2HfCl6, K2HfCl6, and Cs2HfCl6
The chemical equilibria representing the reactionsandwere investigated by direct vapour pressure measurements and thermodynamic data such as free energies and enthalpies of reaction have beenExpand
Equilibrium decomposition pressures of the compounds K2ZrCl6 and K2HfCl6
The chemical equilibria representing the reactionsandwere investigated by direct vapour pressure measurements. The thermodynamic data for these reactions, such as free energies and enthalpies ofExpand
Some thermodynamic properties of the solutions of ZrCl4 and HfCl4 in CsCl melts
The binary equilibrium phase diagrams of the systems CsCl—Cs2ZrCl6, CsCl—Cs2HfCl6, and CsCl—KF were established by cryoscopy. A portion of the ternary CsCl—KF—ZrCl4 has also beenExpand
Theory of Stationary Electrode Polarography. Single Scan and Cyclic Methods Applied to Reversible, Irreversible, and Kinetic Systems.
was developed for solving the integral equations obtained from the boundary value problems, and extensive data were calculated which permit construction of stationary electrode polarograms fromExpand
Etude des mecanismes d'electrodes lors de l'electrolyse de melanges fondus NaClZrF4
Resume Apres un bref tour d'horizon mettant en evidence les differentes methodes possibles pour effectuer une telle etude, l'auteur expose la methode qu'il a mise au point. Il s'agit d'un procedeExpand