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Research output per year
Elina Huttunen-Saarivirta (Corresponding Author), E. Ghanbari, F. Mao, Pauliina Rajala, Leena Carpén, D. D. Macdonald
Research output: Contribution to journal › Article › Scientific › peer-review
Copper specimens were exposed to Sulfate-Reducing Bacteria (SRB) for 10 months under the conditions corresponding to the final disposal of high-level nuclear waste. In-situ electrochemical impedance spectroscopy (EIS) measurements were carried out to characterize the surface-environment interface after various times of exposure. The EIS results are interpreted in terms of the Point Defect Model (PDM), in order to obtain kinetic information on the formation of the Cu2S passive film. The standard rate constant and the rate constants for the surface reactions revealed that the Cu2S layer is a p-type semiconductor. The diffusion constant for cation vacancies in the barrier layer and the average bulk cation vacancy concentration in the barrier layer were found to be on the orders of 10−13 cm2·s−1 and 1022 cm−3, respectively, i.e., both slightly higher than reported in literature for corresponding electrochemically developed Cu2S layers. The electric field strength was approximately 3·105 Vcm−1 at all measurement points. These results are presented and discussed in this work in the light of storage of high-level nuclear waste.
Original language | English |
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Pages (from-to) | C450-C460 |
Journal | Journal of the Electrochemical Society |
Volume | 165 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
MoE publication type | A1 Journal article-refereed |
Research output: Contribution to journal › Other journal contribution › Scientific › peer-review
Research output: Contribution to journal › Review Article