Corrosion of Inconel 800HT Alloy in Molten Fluoride Salts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000009" target="_blank" >RIV/26722445:_____/24:N0000009 - isvavai.cz</a>

Výsledek na webu

<a href="https://journalmt.com/artkey/mft-202405-0012_corrosion-of-inconel-800ht-alloy-in-molten-fluoride-salts.php" target="_blank" >https://journalmt.com/artkey/mft-202405-0012_corrosion-of-inconel-800ht-alloy-in-molten-fluoride-salts.php</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21062/mft.2024.087" target="_blank" >10.21062/mft.2024.087</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Corrosion of Inconel 800HT Alloy in Molten Fluoride Salts

Popis výsledku v původním jazyce

Molten salt reactors are one of the technologies developed under GEN IV nuclear research. The molten mix of LiF and BeF2, LiF, NaF nad KF, or NaBF4 and NaF act both as a reactor coolant both in primary and secondary loop. The combination of molten fluorides and high temperature creates highly corrosive environment. The aim of this work was to test corrosion resistance of Inconel 800HT alloy in molten FLiNaK, FliBe and NaBF4-NaF mix. The testing tube was filled with salt mixture and heated to 600-725 degrees C for a total of 1800 hours. The material exposed to NaBF4-NaF mix shoved mild corrosion attack on grain boundaries. Samples exposed to FLiNaK salt were more damaged, largely the part above the salt surface. The intergranular corrosion was also observed, more severe than in the case of NaBF4-NaF environment. Corrosion in the FLiBe salt caused depletion of alloying metals from the material's surface. In all cases was dissolving of Cr into the melt identified as the main mechanism. The corrosion was accelerated by impurities in the salt mix, mostly water forming hydrogen fluoride gas in combination with insufficient seal of the testing tube.

Název v anglickém jazyce

Corrosion of Inconel 800HT Alloy in Molten Fluoride Salts

Popis výsledku anglicky

Molten salt reactors are one of the technologies developed under GEN IV nuclear research. The molten mix of LiF and BeF2, LiF, NaF nad KF, or NaBF4 and NaF act both as a reactor coolant both in primary and secondary loop. The combination of molten fluorides and high temperature creates highly corrosive environment. The aim of this work was to test corrosion resistance of Inconel 800HT alloy in molten FLiNaK, FliBe and NaBF4-NaF mix. The testing tube was filled with salt mixture and heated to 600-725 degrees C for a total of 1800 hours. The material exposed to NaBF4-NaF mix shoved mild corrosion attack on grain boundaries. Samples exposed to FLiNaK salt were more damaged, largely the part above the salt surface. The intergranular corrosion was also observed, more severe than in the case of NaBF4-NaF environment. Corrosion in the FLiBe salt caused depletion of alloying metals from the material's surface. In all cases was dissolving of Cr into the melt identified as the main mechanism. The corrosion was accelerated by impurities in the salt mix, mostly water forming hydrogen fluoride gas in combination with insufficient seal of the testing tube.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Manufacturing Technology

ISSN

1213-2489

e-ISSN

2787-9402

Svazek periodika

24

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

755-764

Kód UT WoS článku

001389468500006

EID výsledku v databázi Scopus

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