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

    18 Citations (Scopus)

    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

    Fingerprint

    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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    title = "Corrosion of copper in simulated nuclear waste repository conditions",
    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.",
    author = "Iva Betova and Bj{\"o}rn Beverskog and Martin Bojinov and Petri Kinnunen and Kari M{\"a}kel{\"a} and Sven-Olof Pettersson and Timo Saario",
    year = "2003",
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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

    TY - JOUR

    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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