Passivation for HDG

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.

Contact

Need process advice? Ask Roland van Meer (Sales Director)

+31 (0) 167 526 900

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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):

Passivation ADL-32

After cooling bath (in dedicated passivation zone):

Passivation ADL-3P

In manual process:

Spray Passivation

More information and expert contact

Exceeding the market standard

HDG passivations have a huge range of requirements on a complex combination of zinc based alloys. This drives the need for close working relationships, consultation, testing and pilot line experimentation. With its passivation portfilio AD shows that replacing chromium-6 while maintaining the highest quality is possible.

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Passivation ADL-32

Direct use in quench tank. Passivation ADL-32 is free of chromium(VI). It is a water-based trivalent chrome passivation to be applied op freshly galvanized steel surfaces.

Passivation ADL-32

Passivation ADL-3P

Passivation ADL-3P is free of chromium(VI). It is a water-based trivalent chrome passivation to be applied op freshly galvanized steel surfaces.

Passivation ADL-3P

Spray Passivation

Traditional passivation methods require a dedicated immersion bath in the quenching or cooling stage. This spray technology provides a solution for galvanizers looking to upgrade their corrosion protection capabilities without major process modifications or investments.

Spray Passivation