PN-4 Black Nano sealant ; Chrome free Sealant Zinc Plating Chemicals
1. Completely free of any hexavalent chromium and silver material, completely environmentally friendly high-tech.
2. The black color is not produced from nickel salt reaction.
3. Suit for various zinc plating, and can produce a uniform black appearance.
4. Get white rust from neutral salt spray test up to 145h or more.
Zinc plating → Washing for twice → Immerse nitrate (0.5%) → Washing for twice → passivation → Washing with deionized water for twice → Drying by centrifuge → Sealing with PN-4 → Centrifugal drying(15 seconds, 250RPM) → Curing (80 ℃, 30min)
3. Operating instructions
|Preparation||Operation range||Best operation|
|PN-4||Original solution||Viscometer 10 seconds|
|Bath material||Acid-resistant plastic lining steel bath||/|