Electropolish surface finish
Electropolish applied by YiguProto

Surface finish

Electropolish for CNC & Molded Parts

Electropolish is reverse plating. It dissolves a thin surface layer to leave a smooth, bright, clean finish.

  • Mirror-smooth, contaminant-free surface.
  • Best for stainless steel and medical parts.
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What it is

What Is Electropolish?

Electropolishing is the reverse of electroplating. The part is the anode in a chemical bath. A small amount of surface metal is removed, taking peaks down to the valleys. The result is a smooth, bright, micro-clean surface with fewer gaps for bacteria or corrosion to hide.

It is the standard finish for hygienic and semiconductor parts because it removes embedded contaminants.

How it works

How Electropolish Works

Clean & degrease

We remove oil and particles first.

Immerse as anode

The part is the positive electrode in the bath.

Apply current

Surface peaks dissolve faster than valleys.

Rinse & passivate

We rinse and often passivate the stainless.

A few microns are removed, which smooths the surface without changing the shape much.

Why choose it

Benefits of Electropolish

Bright & smooth

Mirror-like, easy-to-clean surface.

Corrosion resistance

Removes inclusions that start rust.

Hygienic

Fewer crevices for bacteria to grow.

Deburrs

Rounds micro-edges as it smooths.

Dimension stable

Removes only microns.

Typical specs

Typical Electropolish Specifications

SpecificationTypical range / valueNotes
Material removal1 – 25 µm
Surface roughnessDown to Ra 0.1 µm
Base materialsStainless steel, aluminium, titanium
FinishBright, reflective

Best applications

When to Use Electropolish

Medical devices

Surgical and implant tools.

Food & pharma

Hygienic process equipment.

Semiconductor

Clean chambers and parts.

Sanitary fittings

Valves and couplings.

Materials

Compatible Materials for Electropolish

We apply Electropolish to the materials below. Not sure if your material qualifies? Our engineers will confirm it for free.

Stainless steel (300/400)AluminiumTitaniumCopper alloys

Our solution

Our Electropolish Solution

We electropolish stainless and other metals to a bright, hygienic finish. We often pair it with passivation for maximum corrosion resistance.

  • Mirror-smooth surface for clean-critical use.
  • Deburring and edge rounding included.
  • Passivation available after polishing.
  • Machining and finish in one order.
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For medical and food use, we document the process for traceability and compliance.

Design tips

Design & DFM Tips for Electropolish

Use for clean rooms

Best where hygiene matters most.

Avoid sharp features

Very thin edges may round more.

Mind tolerances

A few microns are removed; allow stock.

FAQ

Electropolish — Frequently Asked Questions

Send your drawings or 3D files. Most quotes come back within a few hours on business days, never more than 24 hours.
Yes. All customer files and ideas are treated as confidential. We sign NDAs when needed.
Yes. Our engineers review your design and suggest changes that cut cost, improve quality, or speed up delivery.
For Electropolish, we support one-off prototypes and full production runs. There is no strict MOQ.
We can make samples for your approval. Cost depends on the process, and it is credited back on a production order.
A reverse-plating process that smooths metal by removing a thin surface layer.
No. Mechanical polish uses abrasives; electropolish uses chemistry and current.
Stainless steel, aluminium, and titanium.
Yes, by removing surface inclusions that start rust.

Need Electropolish on your parts?

Send your files and get a finish recommendation + factory-direct quote.

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