Corrosion of 316L &amp; 316H stainless steel in molten LiF-NaF-KF (FLiNaK)

Doniger, William; Falconer, Cody; Couet, Adrien; Sridharan, Kumar

doi:10.1016/j.jnucmat.2023.154383

Corrosion of 316L & 316H stainless steel in molten LiF-NaF-KF (FLiNaK)

Journal Article · Sun Mar 12 00:00:00 EST 2023 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2023.154383· OSTI ID:2418335

Doniger, William ^[1]; ^[2]; Couet, Adrien ^[2]; Sridharan, Kumar ^[2]

Univ. of Wisconsin, Madison, WI (United States); OSTI
Univ. of Wisconsin, Madison, WI (United States)

The corrosion behavior of 316L and 316H stainless steels (low and high carbon, respectively) in molten LiF-NaF-KF (FLiNaK) salt at 700 °C for 500 h has been investigated. Tests were performed in 316L stainless steel, pyrolytic boron nitride, and glassy carbon capsule materials. The capsule material had a notable effect on the corrosion behavior of the two stainless steels. Further, the modes of corrosion for the two types of stainless steel in various capsule materials were classified into three categories, namely, uniform surface recession, selective grain boundary Cr dissolution, and the dissolution of Cr in the bulk grains. By most metrics, the 316H stainless steel exhibited slightly superior corrosion resistance, while by others the two stainless steels were comparable. These differences in corrosion behavior are attributed to the differences in grain size and the degree of sensitization.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: NE0008803

OSTI ID:: 2418335

Alternate ID(s):: OSTI ID: 2000123

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 579; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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