Passivation ADL-3P

Chromium(VI)- free; based on chromium trivalaent
Excellent quality
Superb white rust protection

Passivation for Cooling Bath Chromefree ADL-3P is free of chromium(VI). It is a water-based trivalent chrome passivation to be applied op freshly galvanized steel surfaces. It offers “white rust” corrosion protection properties that exceed current alternative chromefree passivations.

Contact

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

+31 (0) 167 526 900

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Passivation ADL-3P for HDG product overview:

Developed based on the needs of the galvanizing industry ensuring high performance and easy bath maintanance.

Passivation ADL-3P product properties:

Passivation to be used after the cooling bath. See below process.
Passivation layer on fresh galvanized steel
Chrome trivalent, water based chemical
Protection against white rust
Provides bare corrosion protection during storage and transport
Perfect alternative for hexavalent based processes
Free of SVHC substances

More information and expert contact

Test Results

Passivation ADL-3P has been tested according to the highest quality standards. Below pictures show test results before and after NSS with Passivation ADl-3P.

hexavalent chromefree passivation

Test Results Humidity

Passivation ADL-3P test results for 24-hours of humidity testing.

chromefree test results humidity hdg passivation

Passivation ADL-3P v.s. Chromate passivation

The following table shows an overview comparison between Passivation ADL-3P and a traditional chrome(VI) based passivation.

	Chromate conversion coating	Passivation ADL-3P
Environmental impact	-/-	++
Passivation performance (white rust prevention)	++	++
Chemical basis	chromium(VI), toxic	chrome(III)
Robust and easy to handle proces	++	++
Meets quality standards	Yes, industry standard	Yes, meets the quality standards
Direct use in quench tank	YES	NO
Use after cooling bath (first cooling than passivation)	YES	YES
Appearance	yellow, clear layer	clear layer
Waste water treatment	Multiple steps, chrome reduction required	Regular waste water treatment
Easy to strip passivation of substrate when needed?	NO	YES
Pricing	€	€€ slightly more expensive

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.

Passivation (HDG)

Passivation products of AD are sustainable (free of chrome-6), economic and effective in use. If needed AD Chemicals can tailor the passivation requirements to the specific substrate and application process of a customer.

Passivation HDG

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