What is the Process for Powder Coating?
Initially, the component or product will usually be sandblasted to remove surface impurities or contamination which may reduce the effectiveness of the bonding process. Once the substrate is prepared, the metal surface must be grounded. The powder coating is then sprayed using an electrostatic gun that properly imparts the electric charge to the powder particles. The attraction between the grounded surface and the electrically charged coating causes electrostatic adhesion. Once the spray coating has been applied, the component is heated to cure the coating. Depending on customer requirements, a final layer of powder coating (often a particular color or a clear coat), can be applied.
What is Powder Coating Used for?
Powder coating can be used for almost any surface where an even, highly durable coating is required. Common applications include automotive uses, aerospace, general industrial, utilities, medical and food & beverage solutions.
How Long Does a Powder Coat Finish Last?
Depending on the type of powder coat used, the substrate and the product application, powder coating can be expected to last anywhere from twenty to forty years or more.
What Are the Benefits of Powder Coating?
The main benefits of powder coating are:
- Greater Durability – Powder coating can last for decades, even in challenging conditions.
- Greater Economy – There is far less product wastage when powder coating is used, in comparison with painting.
- A Greener Choice – Powder coatings do not evaporate or release VOCs during the application process.
How Does Powder Coating Work?
Powder coating works due to electrostatic charges between the underlying surface and the coating particles. The positive electrostatic charge of the surface strongly attracts the coating, forming a strong bond which is further cemented by the chemical changes which occur during the curing process.