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Electrochemical Kinetics of the Reaction of Titanium Metal With Titanium Subchlorides in Molten Sodium Chloride.
MacDonald-DJ; Raddatz-AE; Henrie-TA; Kleespies-EK
NTIS: PB 241 879 :16 pages
Rates of electrooxidation and electrodeposition of titanium metal in a bath of molten sodium chloride containing dissolved ticl2 and ticl3 were measured as a function of current density, temperature, and ticl2 and ticl3 concentrations. The rates were found to be nearly linear functions of current density, but their dependence on temperature and on ticl2 and ticl3 concentrations are more complex. A rate equation that adequately describes the anodic electrooxidation at a single temperature (860 deg c) is unit mass rate x 104 (g . Cm-2 . Sec-1) = 2.39 Cd + 0.11 X mole-percent ticl3. Similarly, the cathodic deposition of titanium at 860 deg c can be described by the rate equation: unit mass rate x 104 (g . Cm-2 . Sec-1) = 1.65 Cd - 0.06 (Cd x mole-percent ticl3). The average number of electrons transferred per titanium atom dissolved anodically ranged from 0.84 to 2.7, The exact number being a function of current density and of ticl2 and ticl3 concentrations. In the cathodic experiments, from 2.6 to 6.3 Electrons were transferred per titanium atom deposited, and the ratio was found to be a function only of ticl3 concentration. The results are interpreted in terms of a reaction mechanism involving adsorption.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 241 879
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division