PN-6 High Corrosion Resistance Water-soluble Sealant ; Chrome free Sealant
1. A kind of environmentally friendly sealant without hexavalent chromium.
2. Suit for sealing after various zinc plating passivation, the plating usually appears silver after sealing.
3. Suit for immersion and spray pattern.
4. Can improve the protective effect of a variety of passivation film in neutral salt spray test of 0.2-0.5 times.
2. Process Flow
Zinc plating → Recycle → Wash → Neutralize (with nitric acid 2~3%)→ Passivate → Wash → Sealing with PN-6 → Dry (60~80℃)
PN-6 Sealant: 15-50% (Concentration depends on demands of appearance of the plating, the higher the concentration, the thicker the layer)
Temperature: Room temperature (10-50 ℃)
Drying temperature: 70 ℃ (<120 ℃)
pH: 8-9 (adjust with diluted ammonia or ethanol ammonia)
Usage method: Immerse the workpiece in the bath and then immediately remove the workpiece or spray bath solution on the workpiece.
Tank material: stainless steel, plastic or steel tank with a plastic liner.