Corrosion of AISI 310 and 316 in Molten Hydroxide Under Steam Electrolysis Conditions

M. Anisur, Ashish Aphale, Pawan Dubey, Junsung Hong, Michael Reisert, R. Singh Raman, Su Jeong Heo, Kailash Patil, Hui Xu, Chao-Yi Yuh, Prabhakar Singh

Research output: Contribution to journalArticle

2 Scopus Citations


Steam electrolyzers, utilizing molten hydroxide electrolyte, offers potential for improvement in electrochemical efficiency, cost reduction, use of conventional materials of construction and process scale up for large scale hydrogen production. Stainless steels, used for the fabrication of cell components (current collector, gas separator, wet seals, and manifolds) experience accelerated corrosion in the presence of molten hydroxide electrolyte in both oxidizing (anodic) and reducing (cathodic) atmospheres. In this study, the corrosion behavior of AISI 310 and 316 in hydroxide melt has been studied at 600°C for 50 h. Melt immersion tests revealed formation of the porous lithium iron oxide at the melt-oxide interface for both AISI 310 and 316. Inductively coupled plasma optical emission spectrometry (ICP-OES) analysis showed the presence of Cr in the electrolyte melt obtained from samples exposed to oxidizing atmosphere. Thermochemical analysis was performed to validate the experimental results.
Original languageAmerican English
Pages (from-to)25-34
Number of pages10
JournalECS Transactions
Issue number1
StatePublished - 2020

NREL Publication Number

  • NREL/JA-5K00-78272


  • corrosion
  • electrolysis
  • hydrogen


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