Abstract
In this work, an effort was put to verify the usefulness of the potential step re-passivation technique in studying the stress corrosion cracking (SCC) susceptibility of copper in environments simulating the final repository of high-level nuclear waste. Validation experiments in NaNO2 solutions (0.005, 0.05 and 1.0 M) showed that the technique is applicable with certain boundary conditions. In addition, conduction mechanism of passive films on Cu in nitrites is studied with impedance spectroscopy and quantitatively modeled by the Mixed-Conduction Model for oxide films. As a result, possible correlations between electrochemically derived parameters and SCC susceptibility are found and discussed.
Original language | English |
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Article number | 110447 |
Number of pages | 9 |
Journal | Corrosion Science |
Volume | 205 |
Early online date | 25 Jun 2022 |
DOIs | |
Publication status | Published - 15 Aug 2022 |
MoE publication type | A1 Journal article-refereed |
Funding
The funding of this work within the frames of the project “Susceptibility of Cu-OFP to stress corrosion cracking in sulfide containing environment (SUCCESS)” of the Finnish Research Programme on Nuclear Waste Management 2019–2022 is gratefully acknowledged.
Keywords
- Copper
- Electrochemical impedance spectroscopy
- Nitrite solution
- Re-passivation
- Stress corrosion cracking