ISSN:
1573-9066
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. On the basis of an investigation into the properties of various solutions, the following optimum electrolyte composition (moles/liter) was chosen: 0.2 nickel and iron (jointly) in the form of sulfates, 0.38 (NH4)2SO4, 0.07 NaF, and 0.2 KCl; pH 5. 2. It is shown that the composition of the iron-nickel alloy powder is governed by the concentration of its components in the electrolyte, but is not affected by changes in current density or electrolyte temperature. These characteristics are attributed to the fact that the limiting discharge currents of nickel and iron are similar and change in an equivalent manner under the influence of electrolysis conditions. 3. A study was made of the phase composition of the alloy as a function of nickel and iron concentrations and current density. It was established that the alloys represent a continuous series of solid solutions. 4. The influence of electrolyte composition and electrolysis parameters on the current efficiency was investigated. It was concluded that the optimum electrolysis parameters are a current density of 3000 A/m2 and a temperature of 30°C. 5. The physical properties of the alloy powders were investigated as a function of electrolysis conditions. It was found that 54% of all particles in the powder produced under the optimum conditions are 〈42μ in size, and have an apparent density of 2.85–3.0 g/cm3 and a specific surface area of 1.84×10−2 m2/g. The current efficiency under such conditions is 72–74%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00776604
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