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Journal of Chinese Society for Corrosion and protection  2014, Vol. 34 Issue (3): 211-217    DOI: 10.11902/1005.4537.2013.117
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Corrosion of Materials for Molten Salt Reactor
XU Yaxin, ZENG Chaoliu()
State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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Abstract  

A molten salt reactor (MSR) is a kind of nuclear fission reactors using a molten salt mixture as the primary coolant and fuel. As one of the generation IV reactors MSR has received an increasing attention. The corrosion of materials is one of the technical obstacles to the development of MSR, and thus has been investigated extensively. Up to now, great progresses have been achieved<br>in the study of the corrosion of materials in MSR environments. This paper presents a comprehensive review of the progress in research work on the corrosion of materials for MSR.

Key words:  molten salt reactor      fluorides      material corrosion     
Received:  19 July 2013     
ZTFLH:  TQ050.9  

Cite this article: 

XU Yaxin, ZENG Chaoliu. Corrosion of Materials for Molten Salt Reactor. Journal of Chinese Society for Corrosion and protection, 2014, 34(3): 211-217.

URL: 

https://www.jcscp.org/EN/10.11902/1005.4537.2013.117     OR     https://www.jcscp.org/EN/Y2014/V34/I3/211

Fig.1  Gibbs free energy of formation per molecule of F2 for the salt constituents and the metal fluorides at 850 ℃[5]
Fig.2  

Ni, Fe, Cr, W和Mo在700 ℃ FLiBe(a(LiF)=0.66) 中的电位-酸碱度图[7]

Salt mixture ZrF4 or
BeF2
mol.%
[UF4]
mol.%
[Cr] at
600 ℃
10-6 mol
[Cr] at
800 ℃
10-6 mol
FLiNaK 0 2.5 1100 2700
LiF-ZrF4 48 4.0 2900 3900
NaF-ZrF4 50 4.1 2300 2550
NaF-ZrF4 47 4.0 1700 2100
NaF-ZrF4 41 3.7 975 1050
KF-ZrF4 48 3.9 1080 1160
NaF-LiF-ZrF4
(22-22-23)
23 2.5 550 750
LiF-BeF2 48 1.5 1470 2260
Table 1  Equilibrium level of Cr dissolved in various salts[3]
Fig.3  Mass-loss due to corrosion for various alloys after exposure to FLiNaK at 850 ℃ for 500 h[13]
Fig.4  

温度梯度导致质量转移示意图[20]

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