Predicting and Understanding Corrosion in Molten Chloride Salts

Kerry Rippy, Liam Witteman, Patrick Taylor, Judith Vidal

Research output: Contribution to journalArticlepeer-review

Abstract

Molten chloride salts are stable at higher temperatures than many other salts, including nitrate salts, and are thus promising for heat transfer and/or thermal energy storage in concentrating solar power, nuclear power, and other thermal energy storage applications. However, corrosion in molten chloride salts remains a significant problem. While many studies have been devoted to evaluation of corrosion, we find that a comprehensive method for predicting corrosion in molten chloride salts is lacking. Here, we present an evaluation of corrosion in molten chloride salts using Ellingham diagrams and chloride-oxide stability diagrams, which enable prediction of alloy performance in molten chloride salts and allow corrosion results to be interpreted at a fundamental level. Graphical abstract: [Figure not available: see fulltext.]

Original languageAmerican English
JournalMRS Advances
DOIs
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

NREL Publication Number

  • NREL/JA-5500-86611

Keywords

  • chloride salts
  • chloride-oxide stablity
  • corrosion
  • Ellingham diagrams
  • molten salts

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