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.

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The best chromefree 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 or in cooling bath
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

In cooling bath:

Passivation ADL-3P

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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