Journal of Applied Electrochemistry

, Volume 7, Issue 6, pp 495–500 | Cite as

Borate buffer equilibria in nickel refining electrolytes

  • B. V. Tilak
  • A. S. Gendron
  • M. A. Mosoiu


Buffer capacity studies, carried out using pH titrations, demonstrated that electrolytes containing NiSO4 + H3BO3 + Na2SO4 buffer more effectively than in the presence of H3BO3 + Na2SO4. The increased buffer capacity is dependent on the concentration of both Ni2+ and H3BO3. Thermodynamic analysis of the pH titration data suggested the formation of a weak complex, Ni(H2BO3)2, (logK ∼ 3.8 to 4.9) between Ni2+ and H3BO3 in mixed chloride-sulphate electrolytes at 55° C.


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Copyright information

© Chapman and Hall Ltd. 1977

Authors and Affiliations

  • B. V. Tilak
    • 1
  • A. S. Gendron
    • 1
  • M. A. Mosoiu
    • 1
  1. 1.J. Roy Gordon Research LaboratoryINCO, LtdMississaugaCanada

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