PN-5 Water soluble sealer with high corrosion resistance for zinc plating
Process Flow
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.
4. Can improve the protective effect of a variety of passivation film in neutral salt spray test of 0.2-0.5 times.
Zinc plating → Recycle → Wash → Neutralize (with nitric acid 2~3%)→ Passivate → Wash → Sealing with PN-5 → Dry (80~120℃)
Preparation
PN-5 Sealant: 15-40% (Concentration depends on demands of appearance of the plating, the higher the concentration, the thicker the layer)
Temperature: Room temperature (20-45 ℃)
Drying temperature: 80-120 ℃ (<120 ℃)
pH: 7.0-8.0
Time: 10-60s
Tank material: stainless steel, plastic or steel tank with a plastic liner.
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