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Structure changes in two chosen metallic materials exposed to molten LiF-NaF eutectic mixture – model of corrosion behaviour
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SYSNO ASEP 0324374 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Structure changes in two chosen metallic materials exposed to molten LiF-NaF eutectic mixture – model of corrosion behaviour Title Strukturní změny ve dvou vybraných kovových materiálech po expozici v roztavené eutektické směso LiF-NaF - model korozního chování Author(s) Král, Lubomír (UFM-A) RID, ORCID
Čermák, Jiří (UFM-A) RID, ORCID
Matal, O. (CZ)
Šimo, T. (CZ)
Nesvadba, L. (CZ)
Jílek, M. (CZ)Source Title Kovové materiály. - : Ústav fyziky materiálu AV ČR, v. v. i. - : Ústav materiálov a mechaniky strojov SAV. - : Ústav materiálového výskumu SAV. - : Strojnícka fakulta STU - ISSN 0023-432X
Roč. 47, č. 2 (2009), s. 63-73Number of pages 11 s. Language eng - English Country SK - Slovakia Keywords steels and nickel alloys ; corrosion ; diffusion Subject RIV JF - Nuclear Energetics R&D Projects 2A-1TP1/067 GA MPO - Ministry of Industry and Trade (MPO) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation This work is devoted to the study of changes of structure and chemical composition of two candidate materials for high-temperature power engineering. Materials are studied before and after their exposure to molten mixture 60 mol.% LiF + 40 mol.% NaF at temperature 953 K for exposure times 100, 300 and 1000 h. The exposition was carried out in a quasidynamic regime that simulated the flux of the coolant (the mixture of salts) in the pipeline. In Ni-alloy Ni-6 W-9 Mo-1.7 Ti-7 Cr (wt.%) severe corrosion damage was observed in the surface layer of thickness of about 100 µm. In Ni-coated ferrite steel CSN 411523, elements redistribution close to the interface between the Ni layer/steel substrate was described by a simple model. The Ni layer showed excellent resistance against the corrosion, but its perforation and subsequent local damage of the substrate were also observed. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2009
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