Effect of ultrasonic cavitation erosion on corrosion behavior of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC-10Co-4Cr coating

Sheng Hong, Yuping Wu, Jianfeng Zhang, Yugui Zheng, Yujiao Qin, Jinran Lin

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The effect of ultrasonic cavitation erosion on electrochemical corrosion behavior of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC-10Co-4Cr coating in 3.5 wt.% NaCl solution, was investigated using free corrosion potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in comparison with stainless steel 1Cr18Ni9Ti. The results showed that cavitation erosion strongly enhanced the cathodic current density, shifted the free corrosion potential in the anodic direction, and reduced the magnitude of impedance of the coating. The impedance of the coating decreased more slowly under cavitation conditions than that of the stainless steel 1Cr18Ni9Ti, suggesting that corrosion behavior of the coating was less affected by cavitation erosion than that of the stainless steel.

Original languageEnglish
Pages (from-to)374-378
Number of pages5
JournalUltrasonics Sonochemistry
Volume27
DOIs
Publication statusPublished - 2015 Jun 19
Externally publishedYes

Keywords

  • Cavitation
  • Corrosion
  • HVOF
  • Near-nanostructured
  • WC-10Co-4Cr

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

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