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

1 Citation (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

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Projects

2 Finished

CMEco: Circular Metal Ecosystem

Aji, A., Kalliomäki, T., Seisko, S., Leikola, M., Jafari, S., Peng, C., Agarwal, V., Elomaa, H., Hamuyuni, J., Khalid, M. K., Lundström, M., Halli, P., Sinisalo, P., Wilson, B., Revitzer, H., Partinen, J. & Wang, Z.

01/01/2017 → 31/12/2019

Project: Business Finland: Other research funding

RAMI: RawMatTERS Finland Infrastructure (RAMI)

Karppinen, M.

01/01/2016 → 31/12/2018

Project: Academy of Finland: Other research funding

Equipment

Raw Materials Research Infrastructure

Maarit Karppinen (Manager)

School of Chemical Engineering

Facility/equipment: Facility

Cite this

Aji, A., Aromaa, J., Wilson, B., Mohanty , U. S., & Lundström, M. (2018). Kinetic study and modelling of silver dissolution in synthetic industrial silver electrolyte as a function of electrolyte composition and temperature. Corrosion Science, 138, 163-169. https://doi.org/10.1016/j.corsci.2018.04.014

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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.",

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journal = "Corrosion Science",

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Kinetic study and modelling of silver dissolution in synthetic industrial silver electrolyte as a function of electrolyte composition and temperature. / Aji, Arif ; Aromaa, Jari ; Wilson, Benjamin; Mohanty , Udit S.; Lundström, Mari.

In: Corrosion Science, Vol. 138, 01.07.2018, p. 163-169.

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

TY - JOUR

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

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AU - Aromaa, Jari

AU - Wilson, Benjamin

AU - Mohanty , Udit S.

AU - Lundström, Mari

PY - 2018/7/1

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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

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DO - 10.1016/j.corsci.2018.04.014

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SP - 163

EP - 169

JO - Corrosion Science

JF - Corrosion Science

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