Pre-Shipment Coil Coating in China
What we can process
Loose coils and complete units are handled differently
Loose coils go through the full line: degreasing, rinse, dip or spray coating, and an oven cure logged against the coating specification.
Complete outdoor units cannot go into a curing oven — they carry controls, sensors and a compressor. They are either coated with an air-dry system after the electrical parts are masked, or the coil is removed, coated and cured on its own, then refitted and function-checked before packing.
Which route applies is decided at the specification stage, from the equipment list you send with the enquiry.
Process
01Specify
Equipment, exposure, destination
02Sample
First-article coating for new systems
03Inspect
Incoming check with photo record
04Coat & cure
Dip, spray or flood; cure logged
05QC
Film thickness, coverage, fin bridging, adhesion
06Report & ship
Batch report travels with the goods
Coating options
Selected by site corrosivity. Salt-spray hours from different standards are not compared across systems.
| System | Film thickness | Cure | Best for |
|---|---|---|---|
| PG-S1 Waterborne polysiloxane (sol-gel) | 5–15 μm | Thermal or ambient | New coils before shipment, OEM dip lines |
| PG-S2 Polysiloxane-urethane clearcoat | 5–10 μm | 160 °C / 60 min | Aluminium radiators, bakeable heat exchangers |
| PG-W Waterborne two-component | 5–10 g/m² per side | 80 °C touch-dry | Coil lines, mild coastal and humid sites |
| PG-C Air-dry two-component, chemical-resistant | 20–40 μm | Ambient 72 h | Complete units, chemical and wastewater sites |
Related
- EquipmentVRF and Split Outdoor Unit Protection
- EnvironmentsCoastal HVAC Corrosion by Distance from the Sea
- GuidesCan New Imported Units Be Coated Before Installation?
- CompanyPartner Coating Facilities
- EquipmentMicrochannel Coil Corrosion Protection
- EnvironmentsDesert Heat, Sand and Salt: Gulf Region HVAC
Also see
Do the units need to be opened for coating?
Coils sourced separately are coated directly. Finished outdoor units are partly disassembled so the coil can be dip or spray coated, then reassembled and function-checked.
Who arranges transport to the coating line?
We coordinate pickup from your supplier’s factory to the partner line and delivery to the loading port.
Does coating affect the OEM warranty?
It depends on the manufacturer. We supply film-thickness and heat-transfer data you can share with the OEM before the order.
Can I witness the first article?
Yes. You can attend in person, send a third-party inspector, or approve from photo and thickness records.
Tell us the equipment, the site and the destination port. We reply within 24 hours.