These primers carry a high load of zinc that helps protect steel at scratches and chips and slows rust creep under the film. They are applied over blasted steel and given a partial cure before the topcoat goes on. Zinc-rich powder is used on outdoor structural steel, trailers and coastal equipment.
Heard on the job
Coastal job, so blast, zinc-rich primer, then the superdurable over it.
Also heard as
- zinc primer
Related terms
Epoxy powder
Powder based on epoxy resin, prized for chemical and corrosion resistance but weak in sunlight.
Two-coat
Describing a finish built from a base coat and a top coat, each sprayed separately.
Salt spray
An accelerated corrosion test that holds scribed coated panels in a warm salt fog for hundreds of hours.
Anchor profile
The peak-to-valley roughness that blasting cuts into steel, giving the coating something to grip.