In-situ electrochemical corrosion testing of 310s steel in supercritical water

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F25%3AN0000062" target="_blank" >RIV/26722445:_____/25:N0000062 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.torrossa.com/en/resources/an/5913204#" target="_blank" >https://www.torrossa.com/en/resources/an/5913204#</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12871/9791256081332" target="_blank" >10.12871/9791256081332</a>

Jazyk výsledku

angličtina

Název v původním jazyce

In-situ electrochemical corrosion testing of 310s steel in supercritical water

Popis výsledku v původním jazyce

To enhance heat-to-work conversion efficiency in power cycles, new concepts operating at higher parameters of working fluid are suggested. The concept of supercritical-water-cooled reactor (SCWR), a Generation IV design, operates within a challenging temperature range (280 °C to 625 °C).  Consequently, the SCWR concept will contend with enormous changes in physical and chemical properties of the cooling water around the critical point (374°C), presenting significant material corrosion challenges. In this study, in-situ electrochemical impedance spectroscopy (EIS) was employed to assess charge transfer and corrosion properties of candidate materials for fuel cladding in supercritical water (SCW). Experiments utilized 310S steel samples in a supercritical autoclave setup with a recirculation water loop. Exposures for 1000h at 380 °C or 500 °C (25 MPa) allowed for real-time corrosion rate monitoring. From the impedance spectra, the faradaic and diffusion resistances were evaluated and used to calculate polarization resistance, which is a fundamental parameter determining the instantaneous corrosion rate. By converting to corrosion current and integrating the time dependence, integral corrosion data can be obtained which are directly comparable to the results of weight gain / loss measurements. Our findings demonstrate the feasibility of EIS measurements in SCW in a broad temperature range and highlight its utility for understanding corrosion process in SCW environments.

Název v anglickém jazyce

In-situ electrochemical corrosion testing of 310s steel in supercritical water

Popis výsledku anglicky

To enhance heat-to-work conversion efficiency in power cycles, new concepts operating at higher parameters of working fluid are suggested. The concept of supercritical-water-cooled reactor (SCWR), a Generation IV design, operates within a challenging temperature range (280 °C to 625 °C).  Consequently, the SCWR concept will contend with enormous changes in physical and chemical properties of the cooling water around the critical point (374°C), presenting significant material corrosion challenges. In this study, in-situ electrochemical impedance spectroscopy (EIS) was employed to assess charge transfer and corrosion properties of candidate materials for fuel cladding in supercritical water (SCW). Experiments utilized 310S steel samples in a supercritical autoclave setup with a recirculation water loop. Exposures for 1000h at 380 °C or 500 °C (25 MPa) allowed for real-time corrosion rate monitoring. From the impedance spectra, the faradaic and diffusion resistances were evaluated and used to calculate polarization resistance, which is a fundamental parameter determining the instantaneous corrosion rate. By converting to corrosion current and integrating the time dependence, integral corrosion data can be obtained which are directly comparable to the results of weight gain / loss measurements. Our findings demonstrate the feasibility of EIS measurements in SCW in a broad temperature range and highlight its utility for understanding corrosion process in SCW environments.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

11th International symposium on supercritical water-cooled reactors : Pisa, Italy, February 3-5, 2025

ISBN

979-12-5608-133-2

ISSN

—

e-ISSN

—

Počet stran výsledku

12

Strana od-do

416-427

Název nakladatele

—

Místo vydání

—

Místo konání akce

Pisa, Italy

Datum konání akce

3. 2. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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