ELECTROSTATIC POWDER COATING
What is electrostatic powder coating?
The process of electrostatic powder coating can be divided into three stages
Pre-processing
During this stage, casings are degreased, phosphated and dried in a special chamber.
Paint application
Powder paint is applied on a dry casing by using a spray gun while taking advantage of electrostatic field properties. The casing has the positive electrical potential, while the gun has the negative electrical potential. Consequently, the casing attracts the negatively charged cloud of dust particles. The excess particles are caught by the air filter and re-used.
Paint curing
The casings are then put through a furnace, where the paint is cured under heat (polymerised) at 180-200 ºC. After the process is completed, the casings are left to cool down.
What are the advantages of electrostatic powder coating?
- Excellent anti- corrosive protection
- A high level of mechanical strength
- Good resistance to chemicals, temperature and weather conditions
- Uniformity in application
- Less time consuming
- Thinner application
- 90 percent of the dust particles are filtered and re-used.
What are the environmental benefits?
- Lower VOC emissions from organic solvents and particulate matter
- Smaller amount of special waste
- Smaller amount of wastewater and lower emissions in wastewater
- Potential to be less of a hazard
- Better working conditions for employees