Understanding a novel form of intergranular corrosion of stainless steel 316L exposed to molten LiCl-Li2O-Li

Jeremy T. Moon, William Phillips, William Chuirazzi, Joshua Kane, Dev Chidambaram

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Stainless steel 316 L exposed to LiCl-Li2O molten salt containing Li metal for 500 and 1000 h experiences deep intergranular attack and bulk void formation. This degradation is due to a synergistic corrosion mechanism, different than other forms of molten salt corrosion, where Cr and Mn oxides and carbides form along grain boundaries and are dissolved by Li metal. Synchrotron transmission X-ray microscopy 3D imaging is used to show corrosion morphology and Cr enrichment and depletion in a novel format that has not previously been used for bulk corrosion samples.

Original languageEnglish
Article number111836
JournalCorrosion Science
Volume228
Early online dateJan 7 2024
DOIs
StatePublished - Mar 2024

Keywords

  • De-alloying (C)
  • High temperature corrosion (C)
  • Intergranular corrosion (C)
  • Molten salts (A)
  • SEM (B)
  • Stainless steel (A)

INL Publication Number

  • INL/JOU-21-61410
  • 56115

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