Determination of the critical flow velocities for erosion-corrosion of passive materials under impingement by NaCl solution containing sand

Z. B. Zheng, Y. G. Zheng, X. Zhou, S. Y. He, W. H. Sun, J. Q. Wang

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Transition from passivation to erosion-corrosion at the critical flow velocity (CFV) is of interest for corrosion engineers. This transition phenomenon on 304 stainless steel and a Fe-based amorphous coating was investigated under impingement by sand-containing NaCl solution. Mass loss measurement, open-circuit potential monitoring and potentiostatic test were employed to determine the CFV. The CFV values defined via the three approaches are consistent, about 10. m/s for 304 stainless steel and 15. m/s for the coating. The CFV decreases with increasing the sand concentration. It may serve as an effective tool for evaluating the erosion-corrosion resistance of passive materials.

Original languageEnglish (US)
Pages (from-to)187-196
Number of pages10
JournalCorrosion Science
Volume88
DOIs
StatePublished - Nov 2014

Keywords

  • A. Metal coatings
  • A. Stainless steel
  • B. Erosion
  • B. Potentiostatic
  • C. Passivity

ASJC Scopus subject areas

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

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