Electrochemical recycling of nickel-cobalt-containing tungsten alloys

Fourth interdisciplinary scientific forum with international participation "New materials and promising technologies"

Kuznetsova, O.G.^1 ; Levin, A.M.^1 ; Sevostyanov, M.A.^1 ; Bolshih, A.O.^1

A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, 49 Leninsky pr., Moscow, Russia^1

关键词: Anode current density;    Chronopotentiometry;    Electrochemical activities;    Electrochemical dissolution;    Electrochemical processing;    Potentiodynamic methods;    Tungsten extractions;    Tungsten heavy alloys;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/525/1/012088/pdf
DOI  :  10.1088/1757-899X/525/1/012088

来源: IOP

【 摘 要 】

The potentiodynamic method of linear scanning voltamperometry and chronopotentiometry have been used to investigate the electrochemical dissolution of VNZhK alloy (wt.%: W 90, Ni 7,2, Fe 1,8, Co 1), VNZh alloy (wt.%: W 90, Ni 7, Fe 3), as well as their components in alkaline-Ammonium solutions. The high anode current density of tungsten (∼700 mA/cm2), the passivity of iron and the similarity of nickel and cobalt anode behavior in the studied electrolytes were revealed. A higher electrochemical activity of VNZhK alloy has been established as compared with VNZh alloy, it is related with a decrease in the iron content in the alloy. Using the example of VNZh alloy, the possibility of electrochemical processing of tungsten heavy alloys with a degree of tungsten extraction into solution of more than 99% has been shown.