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Russian Metallurgy (Metally)

, Volume 2019, Issue 5, pp 507–510 | Cite as

Electrochemical Oxidation of a Heavy Tungsten-Containing VNZh-Type Alloy and Its Components in Ammonia–Alkali Electrolytes

  • O. G. KuznetsovaEmail author
  • A. M. Levin
  • M. A. Sevast’yanov
  • O. I. Tsybin
  • A. O. Bol’shikh
Article

Abstract

Linear voltammetry in the potentiodynamic mode is used to study the electrochemical behavior of a heavy tungsten-containing VNZh alloy (in wt %: 90 W, 7 Ni, 3 Fe) and its components in ammonia–alkali electrolytes. The anodic oxidation of individual tungsten and nickel is found to be activated when NH4OH is introduced into the composition of an alkaline electrolyte. Galvanostatic electrolysis is used to perform electrochemical processing of a VNZh-type alloy with a current efficiency of about 100% for tungsten and a specific energy consumption of ~1.5 kW h/kg.

Keywords:

tungsten nickel heavy alloys tungsten-containing alloys anodic dissolution linear voltammetry 

Notes

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • O. G. Kuznetsova
    • 1
    Email author
  • A. M. Levin
    • 1
  • M. A. Sevast’yanov
    • 1
  • O. I. Tsybin
    • 1
  • A. O. Bol’shikh
    • 1
  1. 1.Baikov Institute of Metallurgy and Materials Science, Russian Academy of SciencesMoscowRussia

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