Chromate and colorless conversion coatings
Chromating enables the application of a colorless or yellow conversion coating. Our colorless variant offers comparable high resistance to classic yellow chromate and also meets ROHS requirements, making it environmentally friendly and future-proof. Our SurTec 650 process gives aluminum surfaces a long-lasting, protective coating. The choice between colorless and yellow chromate offers you flexibility to optimally meet both functional and aesthetic requirements.
Precision in nanometers
Highest durability
This process gives your surfaces excellent corrosion resistance. Whether colorless or yellow - the protective coating withstands even the toughest requirements and offers long-lasting quality for your products.
Sustainable technologies
Environment & Future
SurTec 650 meets all the requirements of the ROHS directives and does not contain chromium(VI). This environmentally friendly process combines sustainability with uncompromising performance - a solution for the future.
Combination of protection and design
Individually customizable
Whether colorless or yellow - SurTec 650 offers you the option of optimally adapting your surfaces to functional and aesthetic requirements. Choose a colorless coating for a subtle look or set striking accents with yellow chromate.
Chromating aluminum
Aluminum chromating is a surface treatment process in which a chromate layer is applied to the surface of aluminum. This layer serves to protect the aluminum from corrosion and at the same time improves adhesion for subsequent coatings such as lacquers or paints. The process can be carried out either colorless or in yellow tones and meets high environmental standards.
Low resistance
Advantages
The chromate layer forms a barrier that protects the aluminum from harmful environmental influences such as moisture, chemicals and atmospheric corrosion. This significantly extends the service life of aluminum products, which is of crucial importance in many applications.
Another advantage is the improved adhesion strength for subsequent coatings. The chromate layer serves as an excellent primer for varnishes, paints and other coating materials. This enables a better surface finish and ensures lasting adhesion of the coatings.
FAQs
Is SurTec 650 compatible with powder coating?
Yes, this chromating process is Especially for pre-treatment before powder coating and painting has been developed. The conversion layer produced improves the Wettability and adhesion of the subsequent coating.
The result: Uniform layer formation, high scratch resistance and improved durability of the final coating. The pre-treatment also ensures a stable bond between the substrate and coating in the event of temperature changes, moisture or mechanical stress.
In addition, SurTec 650 can be easily integrated into automated Spraying or dipping processes which makes it ideal for Series production with high repeat accuracy for example in industrial metal construction or in the production of components for vehicles and machines.
What advantages does SurTec 650 offer compared to conventional yellow chromating?
The most important advantage of SurTec 650 lies in the chromium(VI)-free formulation. While classic yellow chromates contain hexavalent chromium - a substance that is hazardous to the environment and health - SurTec 650 Toxicologically harmless and meets modern environmental and safety standards.
Despite the absence of chromium(VI), SurTec 650 achieves a Comparable corrosion resistance like yellow chromate and is therefore a real alternative, even for demanding applications. It also impresses with its
- Colorless appearance for neutral or decorative applications
- High process reliability and simple integration into existing production processes
- Wide material compatibility (especially for aluminum alloys)
This solution therefore offers a future-proof solution for companies that want both legal conformity as well as technical performance want to harmonize.
How does SurTec 650 work with aluminum?
SurTec 650 is a chemical conversion process used on aluminum and aluminum alloys to create a corrosion-resistant, conductive and solderable surface. The layer thickness is around 80-100 nm or less than 1 µ. It is applied by dipping, spraying or wiping.
How the process works:
- Chemical conversion process: SurTec 650 forms a thin, chemically converted layer on the aluminum surface, which consists of chromium(III) compounds.
- Corrosion protection: This layer protects the aluminum from corrosion by creating a barrier against the environment.
- Conductivity and solderability: The layer is conductive and solderable, which is important for various applications.
- Liability for subsequent coatings: SurTec 650 improves the adhesion of paints, adhesives and sealants to the surface.
- Environmental friendliness: The process is chromium (VI)-free and complies with the latest environmental protection directives.
- Application: SurTec 650 is used in many industries, such as electronics, the automotive industry and aerospace.