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  1. No Access

    Chapter and Conference Paper

    Adapting Modern Industrial Operation Parameters in a Standardized Laboratory Cell for Measuring Current Efficiency for Aluminium Deposition: Unexpected Challenges and Lessons Learned

    “ ” is an important cell parameter which shows how efficiently current is used to produce . Operational parameters that affect have been widely studied in the , and factors like electrolyte composition and...

    R. Meirbekova, O. Awayssa, G. M. Haarberg, G. Saevarsdottir in Light Metals 2020 (2020)

  2. No Access

    Article

    Current efficiency and kinetics of cobalt electrodeposition in acid chloride solutions. Part I: The influence of current density, pH and temperature

    In the electrodeposition of cobalt in chloride electrolytes the evolution of hydrogen is a parasitic reaction. On a rotating platinum disc electrode the current efficiency was calculated as the charge used for...

    O. E. Kongstein, G. M. Haarberg, J. Thonstad in Journal of Applied Electrochemistry (2007)

  3. No Access

    Article

    Current efficiency and kinetics of cobalt electrodeposition in acid chloride solutions. Part II: the influence of chloride and sulphate concentrations

    The influence of cobalt chloride concentration, total chloride concentration and sulphate in the electrolyte on cobalt deposition were studied. The current efficiency increased and the overpotential for electr...

    O. E. Kongstein, G. M. Haarberg, J. Thonstad in Journal of Applied Electrochemistry (2007)

  4. No Access

    Article

    Electrodeposition of magnesium from the eutectic LiCl–KCl melt

    Electrodeposition of magnesium in the eutectic LiCl--KCl mixture (58--42 mol%) containing different MgCl2 concentrations was studied using tungsten as cathode material. The temperature was varied above and below ...

    A.M. Martínez, B. Børresen, G.M. Haarberg… in Journal of Applied Electrochemistry (2004)

  5. No Access

    Article

    Authors’ reply

    S. G. Hansen, J. K. Tuset, G. M. Haarberg in Metallurgical and Materials Transactions B (2004)

  6. No Access

    Article

    Authors’ reply

    S. G. Hansen, J. K. Tuset, G. M. Haarberg in Metallurgical and Materials Transactions B (2003)

  7. No Access

    Article

    Thermodynamics of liquid Al-Na alloys determined by using CaF2 solid electrolyte

    The purpose of this work has been to establish activity data on sodium in liquid aluminum-sodium alloys at temperatures applied by the industry in liquid metal refining processes. A coulometric titration techn...

    S. G. Hansen, J. K. Tuset, G. M. Haarberg in Metallurgical and Materials Transactions B (2002)

  8. No Access

    Article

    Determination of diffusion coefficients of depositing ions in molten chlorides by transient electrochemical techniques

    The electrochemical reduction of Pb(II), Zn(II) and Mg(II) ions at glassy carbon and tungsten electrodes in molten KCl–LiCl eutectic was studied by linear sweep voltammetry (LSV), convolutive potential sweep v...

    T. Støre, G.M. Haarberg, R. Tunold in Journal of Applied Electrochemistry (2000)

  9. No Access

    Chapter

    The Electrodeposition of Aluminum-Niobium Alloys from Chloroaluminate Electrolytes

    The electrochemical behavior of niobium in a 52:48 mole ratio AlCl3:NaCl molten salt electrolyte was examined by linear sweep voltammetry, chronoamperometry and chronopotentiometry at 190 °C. Niobium oxidation be...

    G. R. Stafford, G. M. Haarberg in Refractory Metals in Molten Salts (1998)

  10. No Access

    Article

    Electrodeposition of titanium diboride from fused salts

    Electrodeposition of TiB2 has been performed in cryolite-based electrolytes at 960°C and in KF-KCl melts at 800°C. As electroactive species either boron oxide and titanium oxide or potassium tetrafluoroborate and...

    M. Makyta, V. Daněk, G. M. Haarberg, J. Thonstad in Journal of Applied Electrochemistry (1996)

  11. No Access

    Article

    Kinetics and mechanism of the magnesium electrode reaction in molten magnesium chloride

    Using electrochemical impedance spectroscopy (EIS) and relaxation method with galvanostatic perturbation (RM) the kinetics and mechanism of the magnesium electrode reaction in pure molten M9Cl2 have been determin...

    A. Kisza, J. Kaźmierczak, B. Børresen… in Journal of Applied Electrochemistry (1995)

  12. No Access

    Article

    The chemistry of solutions of CeO2 in cryolite melts

    The solubility of CeO2 in cryolite has been investigated as a function of oxygen pressure, alumina content of the melt, and A1F3 content of the melt. Additional information comes from cryoscopic measurements, cyc...

    E. W. Dewing, G. M. Haarberg, S. Rolseth… in Metallurgical and Materials Transactions B (1995)

  13. No Access

    Article

    Measurement of electronic conduction in cryolite alumina melts and estimation of its effect on current efficiency

    The electronic conductivity of molten Na3AlF6 saturated with A12O3 was determined as a function of the activity of Na at 1000 °C by using the Wagner polarization technique. Typical results showed electronic condu...

    G. M. Haarberg, K. S. Osen, J. Thonstad, R. J. Heus… in Metallurgical Transactions B (1993)

  14. No Access

    Article

    Electrodeposition of titanium from chloride melts

    The kinetics of the electrodeposition and electrocrystallisation of titanium were studied in alkali chloride melts. Voltammograms showed two distinct anodic peaks for the oxidation steps Ti/Ti(II) and Ti(II)/T...

    G. M. Haarberg, W. Rolland, Å. Sterten, J. Thonstad in Journal of Applied Electrochemistry (1993)

  15. No Access

    Article

    Electrochemical properties of metal-molten salt mixtures

    Available literature on metal-molten salt mixtures is reviewed with emphasis on electrochemical properties of the dissolved metal in dilute solutions of metals in salts. Phase diagrams and solubility data are ...

    G. M. Haarberg, J. Thonstad in Journal of Applied Electrochemistry (1989)