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  4. Long-term material tests in liquid molten salts
 
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2016
Conference Paper
Titel

Long-term material tests in liquid molten salts

Abstract
The so called solar salts are used as an energy storage media and heat transfer fluid in power plants. The salts can cause significant corrosion to various steels that are in contact with the salt. Static corrosion tests performed with different steels show, that the corrosive attack by industrial grade salt melts is more severe than by defined grade salt melts and the sample corrosion is faster (i.e. the weight gain is larger) for higher temperatures. Slow strain rate (SSR) tests in salt are difficult to conduct due to the corrosive attack of the salt also on the test setup. The SSRT setup in salt could be realized and tests could be conducted successfully. No clear evidence for an accelerated failure of samples tested in salt compared to samples tested in air could be found on Alloy 347 Nb. Comparative low cycle fatigue (LCF) tests at air and in molten salt atmosphere were successfully performed and showed similar results on tubes out of Sanicro 25. No evidence of accelerated crack growth in molten salt could be found.
Author(s)
Preußner, J.
Peiffer, W.
Piedra, E.
Oeser, S.
Tandler, M.
Hartrot, P. von
Maier, G.
Hauptwerk
Advances in materials technology for fossil power plants
Project(s)
OPTS
Funder
European Commission EC
Konferenz
International Conference on Advances in Materials Technology for Fossil Power Plants 2016
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Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
Tags
  • CERT

  • mechanical testing

  • stainless steel

  • molten salt

  • TMF

  • corrosion

  • CSP

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