Long-term in-situ corrosion tests were performed in order to evaluate the influence of lithium ions on the corrosion of zirconium alloy. Experiments were carried out in a high-pressure high-temperature loop (280 °C, 8 MPa) in a high concentration water solution of LiOH (70 and 200 ppm Li+) and in a simulated WWER primary coolant environment. The kinetic parameters characterising the oxidation process have been explored using in-situ electrochemical impedance spectroscopy and slow potentiodynamic polarization. Also, a suitable equivalent circuit was suggested, which would approximate the impedance characteristics of the corrosion of Zr–1Nb alloy. The Mott–Schottky approach was used to determine the semiconducting character of the passive film.
KRAUSOVA Aneta;
MACAK Jan;
SAJDL Petr;
NOVOTNY Radek;
RENCIUKOVA Veronika;
VRTILKOVA V.;
2015-12-15
ELSEVIER SCIENCE BV
JRC99065
0022-3115,
http://www.sciencedirect.com/science/article/pii/S0022311515302531,
https://publications.jrc.ec.europa.eu/repository/handle/JRC99065,
10.1016/j.jnucmat.2015.10.005,
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