Electrostatic Spraying Process
Electrostatic spray coating consists of depositing electrically charged powder particles on the metal surface at ambient temperature. The electrostatic charge is obtained by conveying the powder through a special spraying device, such as “corona” or “tribo” spray-gun.
Criteria For Choosing This Process
Thickness of the part:
The process is recommended for coating parts that are up to 6 mm thick.
Thickness of coating desired:
The process allows controlled thickness ranging from 80 to 120 μm (Rilsan® ESY grades), and from 100 to 150 μm (Rilsan® ES grades).
Size of the part to be coated
There are no limits to the dimensions of the part to be coated; partial coating is possible.
Nature of part - surface treatment
The process is suitable for all types of conductive metal substrates capable of withstanding a temperature of 220°C without deterioration.
Advantages of Electrostatic Spraying
- Good control over powder deposition
- Partial coating of the part can be achieved
- Lower temperature to fuse powder
- Shorter time to fuse powder
- No crosslinking risk compared to thermoset materials
- Smaller powder stock required
- Process may be automated