Automotive Electrophoretic E-Coat Painting Powder Coating

  Electrophoretic paint (E Coat) is now the finish of choice within the automotive industry where high corrosion resistance is required on sub frame components. This is generally far more durable and offers a low cost alternative to powder coating and is becoming ever more popular is general industrial or retail applications where a high corrosion resistance and aesthetically pleasing finish is required.

The e-coat process can be separated into four basic zones:

Pre-treatment

Electrocoat Bath and Ancillary Equipment

Post Rinses

Bake Cure Dry Oven

Typical Ecoat Process Sequence

1. Spray degreasing

2. Immersion degreasing

3. Water rinse.

4. Surface activation

5. Zinc phosphate coating (chromium free).

6. Demineralised water rinse dip

7. Demineralised water rinse dip

8. Demineralised water rinse spray

9. E-coating coating thickness from 10 up to 40 µm

10. UF cascade spray rinse.

11. UF rinse.

12. Demineralised water rinse spray

13. Drying of the parts – compressed air blow.

14. Three stage electric or gas baking of coating with thermal, infrared stove drying oven