Silane-Based Chromate-Free Passivation
Silane-based chromate-free passivation agent forms a highly cross-linked organosilane network on metal surfaces, providing excellent corrosion resistance and paint adhesion without any chromium compounds. The silane coupling chemistry creates strong covalent bonds with metal oxides and organic topcoats simultaneously, making it effective on steel, aluminum, zinc, and galvanized substrates. This technology meets all modern environmental regulations and delivers performance comparable to chromate treatments for most industrial applications.
Technical Specifications
| pH | 4.0-5.5 |
| appearance | Clear to slightly hazy liquid |
| Si content (g/L) | 1-5 |
| active content (%) | ≥15 |
| coating weight (mg/m²) | 50-200 |
Applications
- Automotive and transportation metal pre-treatment
- Multi-metal substrate coating preparation in coil coating
- Aluminum alloy eco-friendly surface treatment
- Galvanized steel corrosion protection without chromium
- Appliance and HVAC chromate-free pre-treatment
Key Features
- Completely chromium-free, fully RoHS and REACH compliant
- Effective on steel, aluminum, zinc, and mixed-metal assemblies
- Forms covalent bonds with both metal surface and organic topcoat
- Excellent wet adhesion retention under humidity and condensation