Electropolishing effect on roughness metrics of ground stainless steel: A length scale study

Doron Nakar, David Harel, Baruch Hirsch

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Electropolishing is a widely-used electrochemical surface finishing process for metals. The electropolishing of stainless steel has vast commercial application, such as improving corrosion resistance, improving cleanness, and brightening. The surface topography characterization is performed using several techniques with different lateral resolutions and length scales, from atomic force microscopy in the nano-scale (<0.1 μm) to stylus and optical profilometry in the micro- and mesoscales (0.1 μm-1 mm). This paper presents an experimental length scale study of the surface texture of ground stainless steel followed by an electropolishing process in the micro and meso lateral scales. Both stylus and optical profilometers are used, and multiple cut-off lengths of the standard Gaussian filter are adopted. While the commonly used roughness amplitude parameters (Ra, Rq and Rz) fail to characterize electropolished textures, the root mean square slope (RΔq) is found to better describe the electropolished surfaces and to be insensitive to scale.

Original languageEnglish
Article number015003
JournalSurface Topography: Metrology and Properties
Volume6
Issue number1
DOIs
StatePublished - 5 Jan 2018

Bibliographical note

Publisher Copyright:
© 2018 IOP Publishing Ltd.

Keywords

  • Gaussian filter
  • electrochemical polish
  • optical profilometer
  • roughness parameters
  • roughness slope
  • stylus profilometry

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