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Journal of Applied Electrochemistry

, Volume 12, Issue 1, pp 53–58 | Cite as

Diffusional kinetics of metalliding zinc into solid copper

  • A. Sclafani
  • V. Augugliaro
  • L. Rizzuti
  • S. Lucia
Papers
  • 38 Downloads

Abstract

The process of incorporation of zinc into a copper cathode has been experimentally studied in a molten salt system at 381±2° C and at various current densities. The process is shown to be kinetically controlled by the diffusion of Zn into the solid matrix. A galvanostatic pulse titration technique has been used to determine the chemical diffusion coefficient at various alloy compositions, and an exponential relationship has been found between the diffusivity and the third power of the zinc concentration in the alloy. This relationship was then used in the diffusion equation within the solid matrix and a numerical integration was performed. Very good agreement was found between the calculated and experimental data for Zn interfacial concentration versus time. The same calculation procedure was used to determine zinc concentration profiles in the alloys.

Keywords

Zinc Concentration Profile Diffusion Equation Alloy Composition Zinc Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

cA

concentration of the diffusing metal (mol cm−3)

DAB

chemical diffusion coefficient of A into B (cm2 s−1)

E

cell e.m.f. (mV)

F

Faraday number

i

current density (A cm−2)

t

time (s)

VM

alloy molar volume (cm3 mol−1)

x

linear dimension in the diffusion direction (cm)

X

zinc mass fraction in the alloy

z

ionic valence of Zn

δ

stoichiometric ratio Zn/Cu

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Copyright information

© Chapman and Hall Ltd. 1982

Authors and Affiliations

  • A. Sclafani
    • 1
  • V. Augugliaro
    • 1
  • L. Rizzuti
    • 1
  • S. Lucia
    • 1
  1. 1.Istituto di Ingegneria ChimicaUniversity of PalermoItaly

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