Corrosion testing of nickel alloy for molten salt reactors

• Autorzy: Slama P. , Marecek M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The article deals with corrosion test conducted in LiF – BeF2 molten salt at 700°C using nitrogen as the inert atmosphere with the test durations of 1 and 3 months. Design/methodology/approach: The experiment was carried on nickel superalloy MoNiCr which was developed by COMTES FHT Inc. for application in molten salt reactors circuits. Corrosion testing was conducted in collaboration with Nuclear Research Institute Rez. Findings: The results show that chromium and molybdenum are preferentially released into the melt and the surface and grain boundaries become depleted of chromium. Rerearch implications: The assessment of corrosion damage suggests that in the LiF-BeF2 melt at 700°C, chromium and molybdenum are preferentially released into the melt and the surface and grain boundaries become depleted of chromium. Originality/value: The nickel alloys are determined for modern conceptions of nuclear reactors in which molten fluoride salts are used in the primary and/or secondary circuit as coolants. Particularly MONICR alloy represents a material alternative with high corrosion resistance in the area of fluoride salts and it has very good creep properties in the temperature range of 650-750°C as well.

Słowa kluczowe

EN

nickel alloys; salt reactors; fluorite salts; corrosion

PL

stopy niklu; reaktory solne; sole fluorkowe; korozja

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 70, nr 2
• Strony: 78--85
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Slama P.

• COMTES FHT a.s., Prumyslová 995, 334 41 Dobrany, Czech Republic

autor

Marecek M.

• Research Centre Rez, Hlavni 130, Rez, 250 68 Husinec, Czech Republic

Bibliografia

• [1] M.J. Donachie, S.J. Donachie, A. Superalloys, Technical Guide, The Materials Information Society, Materials Park, OH 44073-0002, 2002, ISBN 0-87170-749-7.
• [2] Z. Novy, J. Dzugan, P. Motycka, P. Podany, J. Dlouhy, On Formability of MoNiCr Alloy, Advanced Materials Research 295-297 (2011) 1731-1737. www.scientific.net/AMR.295-297.1731
• [3] Z. Novy, J. Dzugan, P. Wangyao, L. Kraus, Development of Forming Processes for MoNiCr Alloy, Key Engineering Materials 658 (2015) 3-7.
• [4] 2014 GIF Annual report. Available at: http://tinyurl.com/GIF2014-annual-report
• [5] P. Wang Yao, et al., Microstructure Development by Hot and Cold Working Processes in Nickel Based Alloy, Journal of Metals, Materials and Minerals 13/2 (2000) 333-43.
• [6] Zheng Guiqiu, Corrosion Behavior of Alloys in Molten Fluoride Salts, dissertation thesis, 2015, University of Wisconsin-Madison.
• [7] N. Iwamoto, Y. Makino, K. Furukawa, Y. Katoh, H.Katsuta, Corrosion of the Hastelloy-N in Molten Flinak Loop, Transactions of JWRI 9/2 (1980) 259-261.
• [8] J.W Koger, Corrosion Product Deposition in Molten Fluoride Salt Systems, Oak Ridge National Laboratory, Oak Ridge, Tenessee, 1973.