Zinc rich primer powder coating are recommended for use as an anti-corrosive primer where good-quality chemical conversion pre-treatment is recommended or specified but may not be available. Intended to be overcoated with a suitable coating, depending on the end-use application. The primer is partially cured prior to application of the topcoat in order to achieve bonding of the two layers. The substrate must be in a clean, rust-free condition prior to application of the primer.
Properties
Mandrel bend | BS3900 Pt E1 | Pass 13mm |
Scratch resistance | BS3900 Pt E2 | Pass 4kg |
Impact resistance | BS3900 Pt E3 | Pass 50 in/Ibs |
Adhesion | BS3900 Pt E6 (2mm) | No detachment |
Salt fog resistance | ASTM B117 (1000hrs) (plain mild steel) | Max 0.5mm creep |
Humidity | BS3900 Pt F2 (1000hrs) (plain mild steel) | No blistering |
Beckryzinc® Beckryzinc® from Dupont is widely used for corrosion resistance using a top coat polyester. This zinc rich powder provides excellent adhesion to the substrate.