Electrophoresis (E-Coat) surface finish
Electrophoresis (E-Coat) applied by YiguProto

Surface finish

Electrophoresis (E-Coat) for CNC & Molded Parts

Electrophoresis (e-coat) paints parts using electricity. It gives full, even coverage even in hidden areas.

  • Complete coverage, including recesses and seams.
  • Tough, corrosion-resistant paint base.

What it is

What Is Electrophoresis (E-Coat)?

Electrophoresis, or electrocoating (e-coat), is a painting method. The part is dipped in a paint bath and used as an electrode. Electric current pulls paint particles onto the surface. The coating is then baked to cure. It reaches spots that spray paint misses, like inside tubes and seams.

E-coat is the standard primer in automotive bodies because it protects every crevice.

How it works

How Electrophoresis (E-Coat) Works

Pre-treat

We clean, phosphate, and rinse the part.

Dip in paint bath

The part is immersed in the e-coat bath.

Apply current

Electricity drives paint onto all surfaces.

Rinse & cure

We rinse off excess and bake to harden the film.

Because coverage follows the electric field, hidden and internal surfaces are coated too.

Why choose it

Benefits of Electrophoresis (E-Coat)

Full coverage

Reaches inside tubes and seams.

Strong corrosion resistance

Seals the whole part uniformly.

Durable film

Baked paint is tough and chip-resistant.

Great primer

Works under a topcoat of paint or powder.

Typical specs

Typical Electrophoresis (E-Coat) Specifications

SpecificationTypical range / valueNotes
Film thickness15 – 35 µm typical
ColorBlack, grey, and custom
Cure temp150 – 200 °C
Base materialsSteel, aluminium, zinc

Best applications

When to Use Electrophoresis (E-Coat)

Automotive bodies

Structural and hidden panels.

Appliances

Frames and enclosures.

Hardware

Brackets, fasteners, and mounts.

Structural parts

Welded assemblies and tubes.

Materials

Compatible Materials for Electrophoresis (E-Coat)

We apply Electrophoresis (E-Coat) to the materials below. Not sure if your material qualifies? Our engineers will confirm it for free.

SteelAluminiumGalvanized steelCast iron

Our solution

Our Electrophoresis (E-Coat) Solution

We e-coat steel and aluminium parts for uniform, corrosion-resistant primers. E-coat is a great base under powder or liquid topcoats.

  • Complete coverage of complex and hollow parts.
  • Consistent film thickness by process control.
  • Compatible with powder or paint topcoat.
  • Machining and coating in one order.
For the best corrosion package, we pair e-coat primer with a powder or liquid topcoat.

Design tips

Design & DFM Tips for Electrophoresis (E-Coat)

Use for hollow parts

E-coat covers inside surfaces spray cannot.

Mask threaded holes

Tell us holes to leave clear.

Plan topcoat

Add a color topcoat for appearance.

FAQ

Electrophoresis (E-Coat) — 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 Electrophoresis (E-Coat), 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.
Electrocoating: paint applied by electric current in a bath.
Usually a primer; it pairs well with a topcoat.
Yes, it coats inside tubes and seams.
Conductive metals like steel, aluminium, and zinc.

Need Electrophoresis (E-Coat) on your parts?

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

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