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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

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

Popis výsledku anglicky

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).

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceeding of the Eurocorr 2010

ISBN

978-5-317-03383-5

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

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Název nakladatele

Maks Press

Místo vydání

Moskva

Místo konání akce

Moskva

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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