The investigation of surface morphology forming mechanisms in electropolishing process

Shuo Jen Lee, Yi Ho Chen, Jung Chou Hung

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


As a popular application of electrochemical anodic dissolution, electropolishing is extensively adopted in the surface finishing industries of metals. Anodic dissolution is a complex reaction with many process parameters and chemical properties involved. A simple explanation of the mechanism of morphology formation during the EP reaction is still lacking. This study examines the morphology formation of stainless steel 304 at the same location on the specimen as the process evolves. Based on these observations, the basic mechanisms of morphology formation in EP process are proposed. The bubble shielding effect (BSE) and the broken bubble tunnelling effect (BBTE) explain the raised and dented morphologies, respectively. The broken bubble tunnelling effect (BBTE) explains the formation mechanism of pitting holes and the bubbleshielding effect (BSE) explains the limitation of surface roughness of electropolishing process. Simulation results are consistent with the observed morphology formation phenomena.

Original languageEnglish
Pages (from-to)12495-12506
Number of pages12
JournalInternational Journal of Electrochemical Science
Issue number12
StatePublished - 2012


  • Broken bubble tunnelling effect
  • Bubble shielding effect.
  • Electropolishing
  • Pitting
  • Surface morphology


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