journal article·2018-07

Kinetic study and modelling of silver dissolution in synthetic industrial silver electrolyte as a function of electrolyte composition and temperature

Arif T. Aji, Jari Aromaa, Benjamin P. Wilson, Udit S. Mohanty, Mari Lundström

Corrosion Science· Volume 138
Publisher page

Abstract

Abstract The kinetics of silver dissolution in silver electrorefining process was investigated using a series of synthetic electrolytes and different electrode sizes. Kinetic models at corrosion potential and industrial range overpotentials were constructed as a function of electrolyte composition and temperature. The results revealed that overpotential of 150–200 mV vs. corrosion potential represented the values corresponding to the industrial silver electrolysis. In order to achieve a high current efficiency in silver electrorefining, our kinetic models suggest that concentration of HNO3 should be less than 5 g/dm3 or 3 g/dm3 for operation at 25 °C and 45 °C, respectively.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Corrosion Behavior and Inhibition · Metal Extraction and Bioleaching · Electrodeposition and Electroless Coatings

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (19)

Show source-provided references
1. Kinetics of the dissolution of pure silver and silver-gold alloys in nitric acid solution10.1007/BF02663143 ↗
2. Pletcher · 1990
3. P. Claessens, J.L. Cromwell, Silver Electrolysis Method in Moebius Cells, European Patent, EP 0775 763 B1, (1999).
4. Modelling the effect of temperature and free acid, silver, copper and lead concentrations on silver electrorefining electrolyte conductivity10.1016/j.hydromet.2016.09.006 ↗
5. Modelling the physico-chemical effect of silver electrorefining as effect of temperature, free acid, silver, copper and lead concentrations
6. Evans · 1960
7. Bancroft · J. Phys. Chem. Soc. · 1924 · 28 · 97310.1021/j150243a006 ↗
8. Corrosion characterization of new tin-silver binary alloys in nitric acid solutions10.1016/j.corsci.2008.02.003 ↗
9. Kinetic investigation of reaction between metallic silver and nitric acid solutions10.1002/1521-4125(200008)23:8<707::AID-CEAT707>3.0.CO;2-L ↗
10. Kinetics of silver dissolution in nitric acid from Ag-Au00-Cu0.10 and Ag-Cu0.23 scraps
11. Inhibition of silver corrosion in nitric acid by some aliphatic amines10.1080/01932690903294022 ↗
12. Kinetic investigation of reaction between metallic silver and nitric acid solutions in the range 7.22−14.44 M10.1021/ie980121w ↗
13. Eriksson · 2008
14. Compton · 2007
15. Why microelectrodes?
16. Diffusion current at microdisk electrodes – application to accurate measurement of diffusion coefficients10.1016/S0022-0728(81)80082-4 ↗
17. Diffusion processes at finite (micro) disk electrodes solved by digital simulation10.1016/S0022-0728(81)80285-9 ↗
18. Influence of electrolysis parameter on the co-deposition of impurities during silver electrorefining
19. The effect of gold on anode passivation and high current density operation under simulated silver electrorefining conditions10.1016/j.hydromet.2016.09.004 ↗