Synergistic effect of cavitation erosion and corrosion of various engineering alloys in 3.5% NaCl solution

C. T. Kwok, F. T. Cheng, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

168 Citations (Scopus)

Abstract

The cavitation erosion and corrosion characteristics of various engineering alloys including grey cast iron, steels, copper-based alloys and stainless steels were studied by means of a 20 kHz ultrasonic vibrator at a peak-to-peak amplitude of 30 μm in distilled water and in 3.5% NaCl solution at 23°C. The contributions of pure mechanical erosion, electrochemical corrosion, and the synergism between erosion and corrosion to the overall cavitation erosion-corrosion in 3.5% NaCl solution were determined. It was found that in 3.5% NaCl solution, the effect of corrosion on the overall cavitation erosion-corrosion was most pronounced in mild steel and grey cast iron, and negligible in stainless steels. The stainless steels only suffered pure mechanical erosion in 3.5% NaCl solution in the presence of cavitation owing to the unfavourable local environment for pit growth.
Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalMaterials Science and Engineering A
Volume290
Issue number1-2
DOIs
Publication statusPublished - 1 Oct 2000

Keywords

  • Cavitation erosion and corrosion
  • Copper-based alloys
  • Grey cast iron
  • Mechanical properties
  • Steels
  • Synergism

ASJC Scopus subject areas

  • Materials Science(all)

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