Electrochemical corrosion behavior of 316L stainless steel in molten fluorides with a temperature gradient

•The corrosion of 316L stainless steel in molten (Li,Na,K)F with temperature gradients is studied.•Corrosion is caused by the potential difference induced by temperature gradient.•The higher the temperature gradient is, the more severe the corrosion will be. The temperature gradient is the main driv...

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Bibliographic Details
Published in:Electrochemistry communications 2019-12, Vol.109, p.106612, Article 106612
Main Authors: Wang, Yanli, Wu, Jiajie, Wang, Changxuan, Zhang, Shenghua
Format: Article
Language:English
Subjects:
316L
Corrosion
Molten (Li,Na,K)F
Temperature gradient
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Summary:•The corrosion of 316L stainless steel in molten (Li,Na,K)F with temperature gradients is studied.•Corrosion is caused by the potential difference induced by temperature gradient.•The higher the temperature gradient is, the more severe the corrosion will be. The temperature gradient is the main driving force for the corrosion of materials in molten fluorides in molten salt nuclear reactors (MSR). In this paper, the corrosion behavior of Fe and 316L stainless steel in molten (Li,Na,K)F with temperature gradients of 650/700 °C and 600/700 °C is investigated. The experimental results indicate that the potential difference of materials in molten fluorides with a temperature gradient is the main driving force for corrosion. The larger the temperature gradient, the more serious the corrosion of the material will be, especially for samples at the hotter end of the range.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2019.106612