Corrosion Resistance of Alumina-Forming Austenitic Steels Under Simulated Accident Conditions for SCWR and SCW-SMR Applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000200" target="_blank" >RIV/26722445:_____/24:N0000200 - 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

Corrosion Resistance of Alumina-Forming Austenitic Steels Under Simulated Accident Conditions for SCWR and SCW-SMR Applications

Popis výsledku v původním jazyce

This study evaluates the potential of Alumina-Forming Austenitic (AFA) steels, containing 2–5% aluminium, derived from SS 310S, as high-temperature corrosion-resistant materials for Supercritical Water Reactors (SCWR) and Small Modular Reactors cooled by Supercritical Water (SCW-SMR) under simulated accident conditions. AFA steels exhibit high-temperature corrosion resistance through alumina (Al₂O₃) scale formation and enhanced mechanical strength via precipitation hardening, with key strengthening phases including NbC, Laves phase, and B2–NiAl. As part of the international ECC SMART project which aims to develop SCW-SMR, flat coupons were exposed to water at the reactor’s inlet temperature of 380 °C and 25 MPa for 1000 hours, where water properties change drastically. The exposed samples were analysed using SEM-EDS/EBSD to evaluate the bulk material microstructure and to determine the corrosion layer. Based on weight gain and thin oxide layer formed on the surface, a very low corrosion rate was detected. Poster at COMAT2024.

Název v anglickém jazyce

Corrosion Resistance of Alumina-Forming Austenitic Steels Under Simulated Accident Conditions for SCWR and SCW-SMR Applications

Popis výsledku anglicky

This study evaluates the potential of Alumina-Forming Austenitic (AFA) steels, containing 2–5% aluminium, derived from SS 310S, as high-temperature corrosion-resistant materials for Supercritical Water Reactors (SCWR) and Small Modular Reactors cooled by Supercritical Water (SCW-SMR) under simulated accident conditions. AFA steels exhibit high-temperature corrosion resistance through alumina (Al₂O₃) scale formation and enhanced mechanical strength via precipitation hardening, with key strengthening phases including NbC, Laves phase, and B2–NiAl. As part of the international ECC SMART project which aims to develop SCW-SMR, flat coupons were exposed to water at the reactor’s inlet temperature of 380 °C and 25 MPa for 1000 hours, where water properties change drastically. The exposed samples were analysed using SEM-EDS/EBSD to evaluate the bulk material microstructure and to determine the corrosion layer. Based on weight gain and thin oxide layer formed on the surface, a very low corrosion rate was detected. Poster at COMAT2024.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2024

Kód důvěrnosti údajů

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