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Electrostatic powder coating: what it is and how it is applied
Steel structures

Electrostatic powder coating: what it is and how it is applied

ISAR GROUP7 November 20264 min read

Electrostatic powder coating is one of the most durable ways to protect metal surfaces and give them a good finish. Unlike liquid paint, it needs no solvents.

What powder coating is made of

Powder coating is a dry, fine powder of resin, pigment and additives. It contains no solvents, so no harmful vapours are released when it is applied.

Electrostatic application

A special gun gives the powder particles an electric charge while the part is earthed. The charged particles are drawn to the part and cover it evenly from all sides, even around the back. Powder that misses the part can be collected and reused.

Curing in the oven

The coated part goes into an oven, usually at 160-200°C. The powder melts, flows over the surface and hardens into a tough, even film. The result is a finish that resists impact, scratches and corrosion.

The key to success: surface preparation

A good finish starts with the surface. The part is blasted clean of rust and old paint and degreased. After curing, the film thickness is measured and adhesion is checked. The method is widely used for steel structures, railings, profiles, panels and equipment housings.

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