Molten salt corrosion (FLiNaK) of a Ni-Mo-Cr alloy and its welds for application in energy-generation and energy-storage systems

被引：34
作者：
Danon, A. E. [1 ,2 ]
Muransky, O. [1 ,2 ]
Karatchevtseva, I. [1 ]
Zhang, Z. [1 ]
Li, Z. J. [3 ]
Scales, N. [1 ]
Kruzic, J. J. [2 ]
Edwards, L. [1 ]
机构：
[1] ANSTO, Sydney, NSW 2234, Australia
[2] UNSW Sydney, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia
[3] Chinese Acad Sci, Shanghai Inst Appl Phys SINAP, Shanghai 201800, Peoples R China
来源：
CORROSION SCIENCE | 2020年 / 164卷
关键词：
Molten salt corrosion; Ni-Mo-Cr alloy; Weldment; FLiNaK; GH3535; MSR; STRUCTURAL-MATERIALS; GALVANIC CORROSION; STRESS-CORROSION; THERMAL-ENERGY; HASTELLOY-N; GH3535; FLUORIDE; MICROSTRUCTURE; TEMPERATURE; PERFORMANCE;
D O I：
10.1016/j.corsci.2019.108306
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The molten salt corrosion performance of a Ni-Mo-Cr (GH3535) alloy weldment, produced using matching filler metal, was assessed. Corrosion testing was performed in FLiNaK molten salt at 750 degrees C for 500 h. Present results reveal that, despite a similar chemical composition, the weld metal has somewhat superior corrosion resistance to the parent metal. The difference is primarily attributed to the significantly lower density of high-angle grain boundaries (HAGBs) in the weld metal. Results further suggest that large M6C carbides present in the parent metal may contribute to corrosion attack of the alloy matrix via galvanic corrosion.
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页数：12
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