Yellow Chromate Passivation Agent
Yellow chromate passivation agent produces the characteristic thick yellow iridescent chromate film on electroplated zinc substrates, offering maximum corrosion protection among chromate conversion coatings. The thick chromate layer contains a significant reservoir of hexavalent chromium for self-healing capability, providing salt spray resistance exceeding 200 hours on zinc. It remains widely used in industrial hardware, fasteners, and agricultural equipment despite RoHS exemptions.
Technical Specifications
| pH | 1.0-2.5 |
| appearance | Yellow to amber liquid concentrate |
| film color | Yellow to olive-yellow iridescent |
| active content (%) | ≥30 |
| film weight (mg/dm²) | 50-200 |
Applications
- Industrial fastener and bolt corrosion protection
- Agricultural and construction hardware passivation
- Electrical conduit and cable tray zinc coating passivation
- General industrial zinc plated component treatment
- Shelf-life extension for zinc plated steel parts
Key Features
- Maximum corrosion protection among zinc passivation options
- Self-healing chromate reservoir extends service life
- Salt spray resistance exceeds 200 hours on bright zinc
- Easy bath monitoring with standard titration methods