Capability
E-Coat (Electrocoat)
E-coat is an electrically-driven organic coating process. The part is dipped into a water-based paint bath, current is applied across the bath, and paint particles deposit onto the part uniformly — including into recesses, internal surfaces, and the complex geometry that conventional spray painting can't reach.
The result is the most uniform, corrosion-resistant, environmentally clean paint finish available for production hardware. Coverage is even across the entire part. Edge coverage is excellent. Drips and sags are eliminated because the deposition is electrochemical, not spray-applied. And the bath itself is water-based with low VOCs, well-aligned with modern environmental compliance.
Process
Electrocoat
Standard Thickness
15–30 µm
Coverage
Uniform
VOC Profile
Low
What E-Coat Does Better
The Performance Case
E-coat doesn't compete with paint and powder coating on every dimension — it wins on the specific ones that matter most to engineering specifications.
- Uniform coverage on complex geometry — current drives the coating into recesses, internal surfaces, and edges that spray painting can't reliably reach
- Excellent edge coverage — corner and edge thickness equals face thickness, eliminating the thin-edge corrosion that plagues spray paint and powder
- Thinner deposits than powder coat — typically 15 to 30 µm, which preserves dimensional fit on tight-tolerance parts where powder coat would interfere
- No drips, runs, or sags — electrochemical deposition eliminates the visual defects of spray application
- Tough, resistant finish — well-adhered to the substrate and resistant to chipping, scratching, and wear over service life
- Chemical and solvent resistant — holds up against the fluids and chemicals modern under-hood and underbody hardware faces
- Low VOCs, water-based — aligned with modern environmental compliance and customer sustainability requirements
Where E-Coat Fits
Common Applications
E-coat is the specified finish across most modern programs where corrosion resistance, complex-geometry coverage, and visual consistency all have to land on the same part.
- Under-hood and underbody automotive components — brackets, brake components, suspension and chassis hardware that face road salt and harsh environments
- Recreational vehicles and equipment — frames, brackets, and structural hardware for ATV, marine, RV, and powersports applications
- HVAC and appliance hardware — refrigeration components, laundry appliance hardware, HVAC duct and equipment fittings
- Aerospace and infrastructure components — structural brackets and racks where uniform finish and corrosion performance both matter
- Industrial hardware — shelves, frames, structural components, and the general industrial parts that benefit from e-coat's complex-shape coverage
Process Flow
Pre-Treatment, E-Coat, Bake Cure
E-coat's corrosion performance depends on what's underneath it. The standard process flow is clean and pre-treat → e-coat dip → rinse → bake cure, with the pretreatment step determining whether the part lands at 240-hour salt spray performance or 1,000+ hours.
For severe-duty applications, e-coat can be applied directly over zinc or zinc-nickel electroplated surfaces, layering two corrosion-protection systems on the same part. For paint-priority applications, e-coat goes over phosphate or nano ceramic pre-treatments, which provide the adhesion base and shift the failure mode away from the metal-to-paint interface.
Specifications & Standards
Standards We Can Meet
ASTM B117
Salt-spray testing standard, 1,000+ hr capable when paired with proper pretreatment
ASTM D3359
Adhesion testing for organic coatings on metal substrates
ASTM D2247
Humidity resistance testing for coated parts
ASTM D522
Mandrel bend testing for coating flexibility on formed parts
IATF 16949
Automotive quality management process control across all facilities
RoHS, REACH, ELV, Low-VOC
Water-based chemistry compliant with global directives
Specifying e-coat for a part?
Send us a drawing, a specification, or a part description. We’ll match the right pretreatment, the right e-coat process, and the right post-cure parameters to your geometry, your corrosion target, and the standard your program runs to.