# Electropolishing

> Reverse plating that brightens, deburrs and passivates stainless in one step.

- Process group: Chemical Treatments
- HTML page: https://fabvector.com/finishes/electropolishing (Portuguese: https://fabvector.com/pt/finishes/electropolishing)

## Specifications

| Spec | Value |
|---|---|
| Coating thickness | Removes 5–10 µm per surface (more at sharp edges, which round slightly) — a subtractive process, not a coating. |
| Tolerance impact | Subtractive: 5–10 µm per surface comes off, with extra removal at edges. Precision features need allowance in the program or masking — we handle the arithmetic when the finish is specified at quote time. |
| Corrosion rating | Exceeds chemical passivation — removes the smeared, contaminated layer entirely and leaves a chromium-enriched, fully passive surface. |
| Appearance | Brilliant bright luster; Ra typically halved (a machined 0.8 µm face lands near 0.4 µm). |
| Applicable substrates | stainless-steel, titanium |

## Not suitable for

Functional sharp edges (cutting edges, sealing lands — current density rounds them; mask or flag them); precision features without the 5–10 µm removal allowance; carbon steels and aluminum (wrong chemistry); erasing deep tool marks (for Ra ≤0.25 µm specs, mechanical polish first, then electropolish).

## Typical applications

- Pharma and food process components
- Surgical instruments and implant-adjacent parts
- Semiconductor fluid-handling parts
- Vacuum chamber internals