image with artdirection image with artdirection

SurTec 643

High-Performance Chrome-free Aluminium Conversion Coating

  • Specifically designed for use in vertical lines
  • Very consistent coating weights at the upper and lower ends of profiles, even in vertical lines
  • Special polymer blend ensures maximum resistance to filiform corrosion
  • Robust process with bath maintenance and dosing controlled via conductivity
  • Easy handling with a make-up and replenisher product system

Chrome-free is the industry standard for the pre-treatment of aluminum prior to powder coating in the architectural industry. Titanium- and zirconium-based systems have successfully replaced chrome(VI) in the majority of the world. But, compared to chrome(VI)-systems, chrome-free systems are invisible, they have much tighter operation windows and they are quickly moving towards borderline performance in respect to filiform corrosion and paint adhesion, especially in case of ageing or contamination of the bath.

SurTec 643 combines SurTec's extensive experience in the application of chrome-free technologies in regions such as France, the Middle East, and North Africa with the comprehensive technical expertise of our community to optimize specific characteristics of metal pre-treatment processes. The result is an innovative product based on the proven zirconium and polymer framework. By selecting a completely new polymer and the ideal zirconium components, a truly unique solution has been developed.

The coating is easy to manage via bath control and can be accurately measured in the coating process. Additionally, it demonstrates significantly improved resistance to filiform corrosion and outstanding paint adhesion, particularly in the presence of contamination and ageing effects. Furthermore, the uniformity of the coating weight along a profile, especially in vertical lines, has been successfully optimized.

To cut it short: SurTec 643 brings comfort and safety to aluminum coaters to run and control a chrome-free process.

aluminium profiles

Contact us

We are looking forward to your inquiry!

  • Torsten Koerner
    Your message to Dr. Torsten Koerner
    Global Director Products Industrial Parts Cleaning & Metal Pre-Treatment
    SurTec International GmbH
    Neuhofstraße 9 64625 Bensheim Germany

For further information about the processing of your data using the contact form, please refer to our privacy policy.

* This information is necessary in order to forward your request to the appropriate contact person.


SurTec worldwide

All over the world our customers benefit from competent services.

Find locations nearby