Effects of particle velocity and applied potential on erosion of mild steel in carbonate/bicarbonate slurry

M.M. Stack, S. Zhou, R.C. Newman

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Abstract

The present paper describes a study of the combined effects of velocity and applied electrochemical potential on the erosion of mild steel in an aqueous carbonate/bicarbonate slurry. The erodent used was alumina; the velocity was varied between 2 and 10 m s(-1) and the potential between -1.0 and 0.2 V (saturated calomel electrode). Measurements were made of the erosion rate in the absence of corrosion (when the surfaces were cathodically protected), the instantaneous corrosion rate, and the overall erosion-corrosion rate. The results showed that the effect of velocity varied as a function of the applied potential. Velocity exponents were evaluated for the various erosion-corrosion conditions, and the tends in the variation of the exponents were discussed for each of the applied potentials. Criteria for the existence of erosion-corrosion regimes in aqueous environments were suggested, and were used to generate an erosion-corrosion map based on the experimental data.

Original languageEnglish
Pages (from-to)261-268
Number of pages8
JournalMaterials Science and Technology
Volume12
Issue number3
Publication statusPublished - Mar 1996

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Keywords

  • corrosion
  • alloys
  • temperature
  • mechanisms
  • oxidation

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