Characterization of synergistic effects between erosion and corrosion in an aqueous environment using electrochemical techniques

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

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Synergistic effects between erosion and corrosion processes on mild steel (MS) in an aqueous carbonate-bicarbonate solution were studied using electrochemical measurements from a rotating cylinder electrode (RCE) system, A rigorous basis for definition and measurement of the ''pure'' erosion rate and corrosion rate was adopted so that so-called synergism could be analyzed precisely. The total erosion-corrosion rate and the corrosion rate in the presence and absence of erosion were measured for a range of electrode potentials and rotation velocities. The corrosion rate increased significantly with the introduction of erodent because of the effect of erosion on corrosion kinetics. The total erosion-corrosion rate under active dissolution and passivation conditions essentially was the sum of the pure erosion rate and the measured (enhanced) corrosion rate, suggesting there was no significant effect of corrosion on the erosion process. However, in the active-to-passive transition regime, some synergistic effects ascribed to erosion were observed (i.e., mechanical damage was enhanced by corrosion).

Original languageEnglish
Pages (from-to)934-946
Number of pages13
JournalCorrosion - Houston Tx
Volume52
Issue number12
DOIs
Publication statusPublished - Dec 1996

Keywords

  • aqueous environments
  • carbonate-bicarbonate solution
  • corrosion rate
  • dissolution
  • electrochemical testing
  • erosion-corrosion
  • mild steel
  • passivation
  • rotating cylinder electrode
  • synergistic effects
  • velocity
  • weight loss
  • carbon steel
  • iron
  • depassivation

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