In-situ electrochemical characterization of zirconium alloys corrosion in high temperature power cycle environment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F10%3A00024054" target="_blank" >RIV/60461373:22320/10:00024054 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
In-situ electrochemical characterization of zirconium alloys corrosion in high temperature power cycle environment
Original language description
In the presented paper, corrosion of different types of zirconium alloys was investigated in-situ under high pressure high temperature conditions using electrochemical impedance spectroscopy (EIS) and polarization measurements. Chemical conditions were those applied in WWER type of reactor coolant (boric acid, potassium hydroxide, lithium hydroxide). Experimental impedance spectra were approximated by equivalent circuits (EC) based models. Optimal model was selected and parameters characterizing time evolution of oxide parameters and kinetic and mass transfer parameters of zirconium alloys corrosion were obtained. Kinetic parameters (Tafel constants) were derived from in-situ measured polarization curve. Applicability of Stern-Geary approximation for high temperature corrosion of zirconium alloys was discussed. Electrochemical corrosion parameters were correlated with those obtained by independent methods (weight gain, electron spectroscopy, kalotest).
Czech name
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Czech description
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Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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