How does Powder Coat work?

Powder Coating (or powder coating) is a solvent-free industrial painting technique that uses thermosetting powder to coat and protect metal (and sometimes non-metallic) surfaces. It is a popular method for its strength, durability, and low environmental impact.

How Powder Coating Works, Step by Step:

1. Surface Preparation

Before application, the surface is carefully prepared to ensure optimal adhesion:

• Chemical degreasing or cleaning.

• Mechanical stripping (sandblasting or shotblasting) to remove rust or residue.

• Sometimes, phosphating is applied to improve adhesion and corrosion protection.

2. Powder Application (Electrostatic Painting)

• The powder, composed of resins (polyester, epoxy, etc.) and pigments, is charged electrostatically using a spray gun.

• The part is grounded, which attracts the particles of powder like a magnet.

• This allows for even application, even into nooks and crannies.

3. Oven Firing

• The painted piece is then placed in an industrial oven at approximately 160 to 200°C.

• The powder melts, spreads, and then polymerizes to form a homogeneous, hard, and resistant film.

Advantages of Powder Coating

• High resistance: to wear, impact, UV, and chemicals.

• No solvent emissions (VOCs): environmentally friendly.

• Varied aesthetic appearance: matte, satin, glossy, textured, metallic, etc.

• Recovery of unused powder possible: savings and waste reduction.