Corrosion of 316H stainless steel in flowing FLiNaK salt

Potentiodynamic Polarization of Pure Metals and Alloys in Molten LiF-NaF-KF (FLiNaK) Using the K/K+ Dynamic Reference Electrode

“…[37][38][39] The tendency for Fe and Cr to be corroded simultaneously is consistent with recent observations of Fe-based alloy corrosion in FLiNaK conducted in static corrosion tests 40,41 and in non-isothermal thermal convection flow tests. 42 A few studies have shown varying levels of preferential dissolution of Cr in 316 stainless steel when the chemistry of the salt was modified. 35,[43][44][45] It is speculated that selective dealloying of Cr occurs when the apparent redox potential of 316L is between the redox potentials of the Cr 2+ /Cr and Fe 2+ /Fe reactions.…”

Corrosion of 316H Stainless Steel Specimens in Two FLiBe (LiF-BeF₂) Salt Batches

“…Figure 1 shows a photograph of welded inner capsules and a schematic of a filled capsule on the right. A similar procedure has been used in previous studies [9][10][11][12][13]. One batch of salt was donated by a commercial partner and is labeled batch #1.…”

Materials properties characterization in the most extreme environments

“…Similar responses have been observed in FLiNaK and FLiBe chemistries considered for molten salt cooled nuclear reactor designs, driving similar research efforts to identify and engineer new materials to withstand those related environments. [190][191][192] Surprisingly, after the seminal work of Atmani and Rameau in 1980, 191,193 who investigated stress-corrosion cracking (SCC) of stainless steel in molten NaCl-CaCl 2 at 840 K utilizing a uniquely designed tensile test apparatus, few groups have aimed at studying the combined impact of mechanical stress and chemical attack under CSP conditions. 194 This research gap, in part, is a result of expected low-stress conditions of CSP or molten salt reactor designs, but localized attack and grain-boundary embrittlement could well be anticipated in service.…”