Electropolishing

Alloys

  • 300-series stainless steels
  • Nitinol (NiTi)
  • Cobalt-chrome alloys
  • and more

Process Data

  • Material removal typically ranges from 0.005mm (0.0002”) to 0.075mm (0.003”) total dimensional reduction.
  • Material removal can also be specified in mass removal.
  • Dimensional removal is generally equivalent in thickness and width, but there are exceptions.

FAQ

How controlled is the process?

Electropolishing is a multivariate process. We exert specific controls at every input to the process to maintain optimum consistency across the part and from part to part. Sometimes this question is really asking how precisely we target a polishing request. Generally, if you change the dimensional removal specification by 5 microns (0.0002”), you will detect a difference in the result.

What does the resulting surface look like?

That depends. In response to customer requirements, we have developed the capability of producing various surface and removal characteristics. Some parts require a lot of rounding, some require keeping close to the original cross-sectional shape. Some parts require macro-smoothening, while some require a micro-smoothening. We aim to give you the surface you are aiming for.

How do I decide between electropolishing and other surface treatments?

  • Goal: Burr-free part     Indicated Process: Mechanical or chemical cleaning
  • Goal: Radiusing     Indicated Process: Microabrasive blasting
  • Goal: Smoothening an intricate or fragile part     Indicated Process: Electropolishing
  • Goal: Surface chemistry modification (e.g., development of a passive oxide layer or reduction of nickel content in the surface) Indicated Process: Electropolishing