- Chromium-6 free; based on chromium trivalent
- For direct use in the quench tank or cooling bath
- Excellent white rust protection
Passivation products free of hexavalent chrome. Trivalent chrome, water-based passivations for freshly galvanised steel surfaces. A passivation forms a layer that gives improved “white rust” corrosion resistance on galvanised steel surfaces. A HDG surface treated with AD passivation does not give white rust for very long times under normal storage conditions.
The best Chrome(VI)-free passivations available
AD Chemicals has developed a range of passivation products designed to meet the needs of general galvanizers (HDG). Ensuring excellent white rust protection and an easy bath maintanance.
Passivation product characteristics:
- Passivation layer on fresh galvanized steel
- Chrome(III) based
- Protection against white rust
- Direct use in quench tank/cooling bath or in a passivation zone
- Provides bare corrosion resistance during storage and transport
- Competes easily with Chrome (VI) based pre-treatments
- Free of substances of very high concern
Types of passivation
Direct use in quench tank (or cooling bath):
After cooling bath (in dedicated passivation zone):
In manual process:
