The effect of cold-rolling on the microstructure and corrosion behaviour of 316L alloy in FLiNaK molten salt

M. Maric, O. Muránsky, I. Karatchevtseva, T. Ungár, J. Hester, A. Studer, N. Scales, G. Ribárik, S. Primig, M. R. Hill

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Abstract

The effect of cold-rolling on the microstructure and molten salt corrosion behaviour of 316L alloy was investigated. Corrosion tests were performed in FLiNaK salt at 600 °C for 300 h. The present results indicate that cold-rolling leads to enhanced corrosion in molten salt despite its beneficial effect on the alloys mechanical properties. It is shown that the corrosion resistance of cold-rolled 316L alloy is largely governed by the presence of high-angle grain boundaries (HAGBs) and geometrically-necessary dislocations (GNDs). Exacerbated corrosion is thus directly related to the increased prevalence of grain boundaries and dislocations within the microstructure.

Original languageEnglish
JournalCorrosion Science
DOIs
Publication statusAccepted/In press - Jan 1 2018

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Keywords

  • 316L
  • Cold-rolling
  • Dislocation density
  • Microstructure
  • Molten salt corrosion

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

Maric, M., Muránsky, O., Karatchevtseva, I., Ungár, T., Hester, J., Studer, A., Scales, N., Ribárik, G., Primig, S., & Hill, M. R. (Accepted/In press). The effect of cold-rolling on the microstructure and corrosion behaviour of 316L alloy in FLiNaK molten salt. Corrosion Science. https://doi.org/10.1016/j.corsci.2018.07.006