The influence of lithium ions on corrosion of zirconium alloys

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The influence of lithium ions on corrosion of zirconium alloys

Popis výsledku v původním jazyce

The influence of lithium ions on corrosion of two types of zirconium alloy Zr1Nb was investigated using electrochemical impedance spectroscopy (EIS). The long-term (up to 1000 hours) in-situ corrosion tests were carried out in the experimental high-pressure high-temperature loop (280 °C, 8 MPa). The experiments were performed in lithiated environment as well as under WWER simulating conditions. The concentration of 70 ppm Li is considered as a significant limit value at which the enhanced corrosion ratestarts to occur. The influence of a higher concentration of lithium (200 ppm) on corrosion characteristic of zirconium alloys was also compared. Impedance spectra were processed using suitable equivalent circuit to determine the transfer and diffusion parameters of the oxide layers. Especially significant are the values of the polarization resistance which are related to the instant corrosion rate. The oxide thickness was determined using Jonscher's analysis and by application of a mode

Název v anglickém jazyce

The influence of lithium ions on corrosion of zirconium alloys

Popis výsledku anglicky

The influence of lithium ions on corrosion of two types of zirconium alloy Zr1Nb was investigated using electrochemical impedance spectroscopy (EIS). The long-term (up to 1000 hours) in-situ corrosion tests were carried out in the experimental high-pressure high-temperature loop (280 °C, 8 MPa). The experiments were performed in lithiated environment as well as under WWER simulating conditions. The concentration of 70 ppm Li is considered as a significant limit value at which the enhanced corrosion ratestarts to occur. The influence of a higher concentration of lithium (200 ppm) on corrosion characteristic of zirconium alloys was also compared. Impedance spectra were processed using suitable equivalent circuit to determine the transfer and diffusion parameters of the oxide layers. Especially significant are the values of the polarization resistance which are related to the instant corrosion rate. The oxide thickness was determined using Jonscher's analysis and by application of a mode

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

EUROPEAN CORROSION CONGRESS

ISBN

978-3-89746-159-8

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

84-91

Název nakladatele

DECHEMA e.V.

Místo vydání

Germany

Místo konání akce

Pisa

Datum konání akce

8. 9. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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