Corrosion of copper in simulated nuclear waste repository conditions

Iva Betova, Björn Beverskog, Martin Bojinov (Corresponding Author), Petri Kinnunen, Kari Mäkelä, Sven-Olof Pettersson, Timo Saario

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The corrosion of copper in simulated deep repository conditions has been studied using thermodynamic calculations and short-term corrosion rate measurements. Thermodynamic calculations have been used to predict the corrosion behavior of copper in 0.0015, 0.4, and 1.5 m chloride solutions at 80°C. The results of the calculations were summarized in Pourbaix diagrams. A combination of experimental techniques (weight loss, solution analysis, and electrochemical impedance spectroscopy) was used to investigate the extent of corrosion in simulated ground waters with different salinity. The results were found to be in accordance with thermodynamic predictions. The corrosion rates in simulated saline ground waters were significant, whereas they were at the limit of detection in simulated fresh groundwater. The corrosion rates have been shown to correlate well with the levels of residual oxygen in the solutions. This means that studies in conditions as close as possible to anoxic are required in order to estimate the possibility of copper corrosion in simulated deep repository conditions. In addition, corrosion current densities determined from impedance spectroscopy were several times too high compared with weight loss and solution analysis data, indicating the inaccessibility of the true polarization resistance from the impedance data.
Original languageEnglish
Pages (from-to)B19-B22
Number of pages4
JournalElectrochemical and Solid-State Letters
Volume6
Issue number4
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

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Radioactive Waste
radioactive wastes
Radioactive wastes
Copper
corrosion
Corrosion rate
Corrosion
Groundwater
copper
Thermodynamics
ground water
Copper corrosion
Saline water
impedance
Electrochemical impedance spectroscopy
thermodynamics
Chlorides
Current density
Spectroscopy
Polarization

Cite this

Betova, Iva ; Beverskog, Björn ; Bojinov, Martin ; Kinnunen, Petri ; Mäkelä, Kari ; Pettersson, Sven-Olof ; Saario, Timo. / Corrosion of copper in simulated nuclear waste repository conditions. In: Electrochemical and Solid-State Letters. 2003 ; Vol. 6, No. 4. pp. B19-B22.
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abstract = "The corrosion of copper in simulated deep repository conditions has been studied using thermodynamic calculations and short-term corrosion rate measurements. Thermodynamic calculations have been used to predict the corrosion behavior of copper in 0.0015, 0.4, and 1.5 m chloride solutions at 80°C. The results of the calculations were summarized in Pourbaix diagrams. A combination of experimental techniques (weight loss, solution analysis, and electrochemical impedance spectroscopy) was used to investigate the extent of corrosion in simulated ground waters with different salinity. The results were found to be in accordance with thermodynamic predictions. The corrosion rates in simulated saline ground waters were significant, whereas they were at the limit of detection in simulated fresh groundwater. The corrosion rates have been shown to correlate well with the levels of residual oxygen in the solutions. This means that studies in conditions as close as possible to anoxic are required in order to estimate the possibility of copper corrosion in simulated deep repository conditions. In addition, corrosion current densities determined from impedance spectroscopy were several times too high compared with weight loss and solution analysis data, indicating the inaccessibility of the true polarization resistance from the impedance data.",
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Corrosion of copper in simulated nuclear waste repository conditions. / Betova, Iva; Beverskog, Björn; Bojinov, Martin (Corresponding Author); Kinnunen, Petri; Mäkelä, Kari; Pettersson, Sven-Olof; Saario, Timo.

In: Electrochemical and Solid-State Letters, Vol. 6, No. 4, 2003, p. B19-B22.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Corrosion of copper in simulated nuclear waste repository conditions

AU - Betova, Iva

AU - Beverskog, Björn

AU - Bojinov, Martin

AU - Kinnunen, Petri

AU - Mäkelä, Kari

AU - Pettersson, Sven-Olof

AU - Saario, Timo

PY - 2003

Y1 - 2003

N2 - The corrosion of copper in simulated deep repository conditions has been studied using thermodynamic calculations and short-term corrosion rate measurements. Thermodynamic calculations have been used to predict the corrosion behavior of copper in 0.0015, 0.4, and 1.5 m chloride solutions at 80°C. The results of the calculations were summarized in Pourbaix diagrams. A combination of experimental techniques (weight loss, solution analysis, and electrochemical impedance spectroscopy) was used to investigate the extent of corrosion in simulated ground waters with different salinity. The results were found to be in accordance with thermodynamic predictions. The corrosion rates in simulated saline ground waters were significant, whereas they were at the limit of detection in simulated fresh groundwater. The corrosion rates have been shown to correlate well with the levels of residual oxygen in the solutions. This means that studies in conditions as close as possible to anoxic are required in order to estimate the possibility of copper corrosion in simulated deep repository conditions. In addition, corrosion current densities determined from impedance spectroscopy were several times too high compared with weight loss and solution analysis data, indicating the inaccessibility of the true polarization resistance from the impedance data.

AB - The corrosion of copper in simulated deep repository conditions has been studied using thermodynamic calculations and short-term corrosion rate measurements. Thermodynamic calculations have been used to predict the corrosion behavior of copper in 0.0015, 0.4, and 1.5 m chloride solutions at 80°C. The results of the calculations were summarized in Pourbaix diagrams. A combination of experimental techniques (weight loss, solution analysis, and electrochemical impedance spectroscopy) was used to investigate the extent of corrosion in simulated ground waters with different salinity. The results were found to be in accordance with thermodynamic predictions. The corrosion rates in simulated saline ground waters were significant, whereas they were at the limit of detection in simulated fresh groundwater. The corrosion rates have been shown to correlate well with the levels of residual oxygen in the solutions. This means that studies in conditions as close as possible to anoxic are required in order to estimate the possibility of copper corrosion in simulated deep repository conditions. In addition, corrosion current densities determined from impedance spectroscopy were several times too high compared with weight loss and solution analysis data, indicating the inaccessibility of the true polarization resistance from the impedance data.

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DO - 10.1149/1.1557033

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