E-Coat vs Spray Coating for Heat Exchangers
E-coat vs spray
| E-coat | Spray | |
|---|---|---|
| Coverage deep in the coil | Excellent — the current drives paint onto every conductive surface. | Good on faces, reduced on inner rows of deep coils. |
| Film uniformity | Very even, self-limiting. | Depends on technique; thicker on faces, thinner inside. |
| Parts | Loose coils that fit the bath and oven. | Any size, including assembled equipment. |
| Batch size | Suits high volume on a dedicated line. | Suits any batch size. |
| Cure | Oven. | Oven or ambient, depending on the system. |
Choose e-coat if…
- You produce large volumes of similar coils
- Uniform coverage in deep coils is the priority
- A dedicated line is available at the coil factory
Choose spray if…
- Coils are large, assembled or mixed in size
- The batch is small or one-off
- The coating must cure at ambient temperature
Cost and lead time
E-coating is economical per coil only when a line runs at volume; setting up a line for a single project is not realistic. Spray has almost no set-up cost and fits any schedule. Our partner lines use dip, spray and flood coating — not e-coat — and this page is written to help you compare the options honestly.
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