SurTec 650
Trivalent Chromium Passivation for Aluminium and Alloys
SurTec 650 is a high-performance trivalent chromium passivation process for aluminium and alloys, widely specified where corrosion protection, electrical conductivity and coating adhesion all need to be achieved in a single treatment.
It is frequently specified within the aerospace and defence sectors.
Key benefits of SurTec 650 include:
- RoHS-compliant trivalent chromium passivation
- Corrosion protection comparable to hexavalent processes
- Excellent pre-treatment for painting, powder coating and adhesive bonding
- Low contact resistance and strong heat resistance
- Suitable for demanding aerospace and defence applications
- Meets MIL-DTL-81706B and MIL-DTL-5541F requirements
Available from Anotec, SurTec 650 offers a RoHS-compliant alternative to traditional hexavalent processes, making it an effective choice for manufacturers seeking environmentally responsible surface treatment without compromising performance.
It delivers excellent bare corrosion protection comparable to hexavalent passivation, helping protect aluminium components in demanding environments.
Applied by immersion, SurTec 650 fulfils the requirements of RoHS, ELV and WEEE and supports manufacturers moving away from chromium(VI)-based chemistries.
The process provides an excellent pre-treatment before painting, powder coating and adhesive bonding, helping improve finish adhesion and long-term component durability.
SurTec 650 is compliant with key aerospace and industrial requirements, including MIL-DTL-81706B and MIL-DTL-5541F for bare corrosion performance, and is also approved by QUALICOAT, giving specifiers added confidence in its technical credibility.
With low contact resistance, strong heat resistance and proven salt spray performance, it is especially well suited to applications where electrical properties, environmental compliance and durable corrosion protection must work together.
Anotec’s capability with SurTec 650 is backed by the wider strength of the Anochrome Group and its AS9100 certification for aerospace-related surface treatment, offering a dependable partner for technically demanding finishing requirements.
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