Dip Coating vs Spray Coating
Dip vs spray
| Dip | Spray | |
|---|---|---|
| Coverage in the coil core | Full — every surface is immersed. | Reduced on inner rows of deep coils. |
| Film control | Set by viscosity, withdrawal speed and drain-off. | Set by spray technique and number of passes. |
| Part size | Limited by tank and oven size. | No practical limit. |
| Complete units | Not possible; the coil must be removed. | Possible after masking. |
| Typical systems | PG-S1, PG-W, PG-S2. | PG-C; PG-S1 and PG-W at low pressure. |
Choose dip if…
- New coils that fit the tank
- High fin density, where film control matters
- Thin-film systems with oven cure
Choose spray if…
- Coils larger than the tank
- Complete outdoor units
- Thicker chemical-resistant films
Cost and lead time
Dipping is fast per coil once the tank is filled with the right system, which makes it efficient for batches of similar coils. Spray takes longer per coil but has no tank to set up, so it suits small batches, large parts and customer-specified coatings.
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