The investigation of material 800H degradation in conditions simulating helium coolant in HTGR system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000099" target="_blank" >RIV/26722445:_____/24:N0000099 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.confer.cz/metal/2023/4738-the-investigation-of-material-800h-degradation-in-conditions-simulating-helium-coolant-in-htgr-system" target="_blank" >https://www.confer.cz/metal/2023/4738-the-investigation-of-material-800h-degradation-in-conditions-simulating-helium-coolant-in-htgr-system</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2023.4738" target="_blank" >10.37904/metal.2023.4738</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The investigation of material 800H degradation in conditions simulating helium coolant in HTGR system

Popis výsledku v původním jazyce

The corrosion coupons of 800H alloy with TIG weld filled with Nicrofer were exposed to impure helium in the High-Temperature Furnace (HTF) at 760 °C for 372, 1000 and 1500 hours. Impurities CH4, CO, H2 and H2O were chosen to simulate conditions in a High-Temperature Gas Reactor system (HTGR). The specimen surface, corrosion layer thickness and composition were evaluated by Scanning Electron Microscope (SEM) with Energy Dispersive Spectroscopy (EDS). Specimens were covered with a uniform protective oxide layer up to 3 µm thick, growing with exposure time. The layer contained mainly Cr, O2 and a minor amount of Mn. Localized deep oxidation was found after 1500 hours in between of weld and base material. The output of these measurements is the evaluation of the properties of the tested materials and the assessment of their resistance to corrosion effects. 800H alloy and Nicrofer alloy were found to degrade similarly in an oxidizing environment. This combination of base material and weld metal appears to be suitable for use at high temperatures.

Název v anglickém jazyce

The investigation of material 800H degradation in conditions simulating helium coolant in HTGR system

Popis výsledku anglicky

The corrosion coupons of 800H alloy with TIG weld filled with Nicrofer were exposed to impure helium in the High-Temperature Furnace (HTF) at 760 °C for 372, 1000 and 1500 hours. Impurities CH4, CO, H2 and H2O were chosen to simulate conditions in a High-Temperature Gas Reactor system (HTGR). The specimen surface, corrosion layer thickness and composition were evaluated by Scanning Electron Microscope (SEM) with Energy Dispersive Spectroscopy (EDS). Specimens were covered with a uniform protective oxide layer up to 3 µm thick, growing with exposure time. The layer contained mainly Cr, O2 and a minor amount of Mn. Localized deep oxidation was found after 1500 hours in between of weld and base material. The output of these measurements is the evaluation of the properties of the tested materials and the assessment of their resistance to corrosion effects. 800H alloy and Nicrofer alloy were found to degrade similarly in an oxidizing environment. This combination of base material and weld metal appears to be suitable for use at high temperatures.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TK02030024" target="_blank" >TK02030024: Stabilita a odolnost materiálů okruhů s vysokoteplotním héliem</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Metal 2023 Brno : 32md international conference on metallurgy and materials : Conference proceedings May 17-19, 2023

ISBN

978-80-88365-21-1

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

—

Místo vydání

—

Místo konání akce

Brno

Datum konání akce

17. 5. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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