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

Arif Aji; Jari Aromaa; Benjamin Wilson; Udit S. Mohanty; Mari Lundström

doi:10.1016/j.corsci.2018.04.014

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

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

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

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 over-potentials 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.

Original language	English
Pages (from-to)	163-169
Number of pages	7
Journal	Corrosion Science
Volume	138
DOIs	https://doi.org/10.1016/j.corsci.2018.04.014
Publication status	Published - 1 Jul 2018
MoE publication type	A1 Journal article-refereed

Keywords

Silver
Kinetics
Modelling studies
Polarization
Anodic dissolution

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10.1016/j.corsci.2018.04.014

Cite this

@article{bc4a40765177441aa42f457bcee3a720,

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

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 over-potentials 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.",

keywords = "Silver, Kinetics , Modelling studies, Polarization, Anodic dissolution",

author = "Arif Aji and Jari Aromaa and Benjamin Wilson and Mohanty, {Udit S.} and Mari Lundstr{\"o}m",

year = "2018",

month = jul,

day = "1",

doi = "10.1016/j.corsci.2018.04.014",

language = "English",

volume = "138",

pages = "163--169",

journal = "Corrosion Science",

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TY - JOUR

T1 - Kinetic study and modelling of silver dissolution in synthetic industrial silver electrolyte as a function of electrolyte composition and temperature

AU - Aji, Arif

AU - Aromaa, Jari

AU - Wilson, Benjamin

AU - Mohanty , Udit S.

AU - Lundström, Mari

PY - 2018/7/1

Y1 - 2018/7/1

N2 - 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 over-potentials 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.

AB - 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 over-potentials 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.

KW - Silver

KW - Kinetics

KW - Modelling studies

KW - Polarization

KW - Anodic dissolution

UR - http://www.scopus.com/inward/record.url?scp=85045438091&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2018.04.014

DO - 10.1016/j.corsci.2018.04.014

M3 - Article

SN - 0010-938X

VL - 138

SP - 163

EP - 169

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

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CMEco: Circular Metal Ecosystem

RAMI: RawMatTERS Finland Infrastructure (RAMI)

Raw Materials Research Infrastructure

Modelling the physico-chemical effect of silver electrorefining as effect of temperature, free acid, silver, copper and lead concentrations

The effect of gold on anode passivation and high current density operation under simulated silver electrorefining conditions

Cite this

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

CMEco: Circular Metal Ecosystem

RAMI: RawMatTERS Finland Infrastructure (RAMI)

Equipment

Raw Materials Research Infrastructure

Research output

Modelling the physico-chemical effect of silver electrorefining as effect of temperature, free acid, silver, copper and lead concentrations

The effect of gold on anode passivation and high current density operation under simulated silver electrorefining conditions

Cite this