Degradation of Inconel 617 and Inconel HX in high-temperature helium environments (900 °C, 101 kPa)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F25%3AN0000120" target="_blank" >RIV/26722445:_____/25:N0000120 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Degradation of Inconel 617 and Inconel HX in high-temperature helium environments (900 °C, 101 kPa)

Original language description

This study presents a detailed analysis of the oxide layers formed on nickel alloys following exposure to high-temperature helium with impurities (H2, CO, O2, CH4, CO2 and H2O). During exposure, the helium flow rate was around 40 ml/min. The focus is on evaluating the alloys' resistance to corrosion and assessing the extent of surface degradation. Specifically, the investigation centers on alloys 617 and HX. After exposure in a tube furnace, the resulting corrosion layers were examined, with particular attention given to their composition and the structural changes within the material. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were employed for characterization of the oxide layers. The outcomes of these measurements provide a comprehensive assessment of the tested materials' properties and their resistance to corrosion. A key contribution of this work is the generation of additional insights into the behavior of nickel alloys in high-temperature gas environments, which may prove valuable in the future development of advanced nuclear reactors. Furthermore, the findings offer critical data for understanding the long-term performance of materials in extreme conditions, particularly in energy generation applications. Results indicate that the corrosion layer formed on Inconel 617 at 900 °C was more stable and compact than that on Inconel HX, which exhibited a thinner layer and corresponded to a lower weight gain after exposure. Presented at EUROCORR 2025 - – The European Corrosion Congress 8–12 September 2025 | Stavanger, Norway.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

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

2025

Confidentiality

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