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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
The investigation of material 800H degradation in conditions simulating helium coolant in HTGR system
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/TK02030024" target="_blank" >TK02030024: Stability and resistance of materials for high temperature helium circuits</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Metal 2023 Brno : 32md international conference on metallurgy and materials : Conference proceedings May 17-19, 2023
ISBN
978-80-88365-21-1
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
1-6
Publisher name
—
Place of publication
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Event location
Brno
Event date
May 17, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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