PreCoat Chromefree pretreatment

PreCoat Chromefree is worldwide the best pretreatment for aluminium
Superb adhesion, corrosion protection and cost effective processing
GSB and Qualicoat approved
QualiMarine compliant
Indepedently tested by IFO for 3024 hours AASS

AD Chemicals PreCoat Chromefree is a completely chromium free conversion coating that is used in the pretreatment of aluminium alloys prior to the coating process. PreCoat is known as the best hexavalent chromium alternative worldwide.

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Use of PreCoat Chromefree

PreCoat CR Free is used to obtain a clear, no-rinse conversion coating on aluminium extrusions and panels. After pre-treatment with PreCoat, the wet film is dried on the aluminium surface without additional rinsing prior to the powder coating.

It is suitable in spraying, immersion and cascade processes.
Qualicoat and GSB approval, QualiMarine compliant
Provides good protection to filiform corrosion
Gives excellent adhesion with organic coatings.

More than 15 years of experience

AD Chemicals had been a leader in the field of hexavalent chromium alternatives for more than 15 years. With PreCoat CR Free you can trust on a robust system with a similar performance as chromium.

Independently tested by IFO Germany

“Is the requirement of 1008 hours corrosion resistance which Qualicoat prescribes enough?”
AD Chemicals doubts this statement of Qualicoat. When you only focus on the 1008 hours corrosion resistance, that has been described in the past, Qualicoat is right. However, the corrosion resistance of chromium (VI) based pretreatments fulfills the 2500 hours. This was a fair value for Chromium (VI) based pretreatments on Aluminium. AD Chemicals has investigated their chromium-free systems on the corrosion resistance of 3024 hours and compared it with the traditional chromium(VI) systems.
Internal research shows that the chrome free pretreatment of AD Chemicals PreCoat Cr Free (Qualicoat A-021), that has been approved since 2003, achieved a corrosion resistance of 2500-3024 hours. So AD Chemicals goes for long corrosion resistance.

precoat chromefree performance

Results AASS 3024 hours

Results after 3024 hours AASS according DIN EN ISO 9227 performed by IFO (Germany).

precoat cr free salt spray test

Advantages of PreCoat

PreCoat has superior paint adhesion properties, it outperforms competitors when tested for bending, punching and cutting aluminium in subsequent processes
PreCoat has the most optimal layer thickness available
Exclusive technology based on more than 20 years of experience with special polymers in coil coating continous processes. This high-end technology is transferred to batch wise processes. Your advantage: a more homogenic conversion layer.
PreCoat offers easy to measure bath parameters ensuring reliable quality control on your baths
PreCoat products have less deposition in comparison with competitive products. Saving you money.
The polymers used in PreCoat chemisty (within conversion layer) are optimally packed in comparison to the products of competitors providing better bonding/paint adhesion properties between the substrate and coating layer.

AD, the chromefree specialist

Also companies that are seeking improvement in an already chromefree process can count on AD. AD has an extensive track record in optimizing the performance and efficiency of chemical pretreatment lines.

Expert advice pre-treatment

Pretreatment

Durability and extended end-use life are demands that consumers take for granted and of which they expect continuous improvement year on year. Paint adhesion and corrosion resistance are critical factors in keeping end-use applications in a condition that is expected to remain in place for their usable life time.

PreCoat pre-treatments

Aluminium passivation

Aluminium passivation creates a clear, thin protective layer that offers excellent corrosion resistance — even without additional coating (bare corrosion protection). This process also enhances paint adhesion and improves the durability of the surface.

Passivation products