Electropolishing of 304 stainless steel: Interactive effects of glycerol content, bath temperature, and current density on surface roughness and morphology

Chi Cheng Lin, Chi Chang Hu, Tai Chou Lee

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

In this study, surface roughness of 304 stainless steel (304SS) varying from ca. 7 to 45 nm can be controlled by changing electropolishing variables in glycerol-containing baths. On the basis of the adsorbate-acceptor mechanism and the model for preferential adsorption of shielding molecules, incorporating the molecular interaction concept is helpful to explain the interactive effects of glycerol content, bath temperature, and current density on the surface roughness (Ra) and morphologies of 304SS. In order to easily understand how to control the surface roughness of 304SS in the glycerol-containing electrolyte, a simplified scheme integrating the above two mechanisms was proposed. From the atomic force microscopy (AFM) analyses, a rough surface is easily obtained by electropolishing at high bath temperatures, which endows the 304SS substrate with pores.

Original languageEnglish
Pages (from-to)448-454
Number of pages7
JournalSurface and Coatings Technology
Volume204
Issue number4
DOIs
StatePublished - 15 Nov 2009

Keywords

  • 304 stainless steel
  • Atomic force microscopy
  • Electropolishing
  • Glycerol
  • Molecular interaction
  • Polishing temperature

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