Corrosion protection systems
For outstanding corrosion protection
Process sequence
Top coat (silver/black)
Passivate (blue, iridescent/black)
Zinc/zinc alloy electroplated substrate
High-end corrosion protection
NSST > 1,000 h to WR possible
Attractive appearance
Appealing and durable appearance
ELV, RoHS compliant
Fulfillment of all requirements according to ELV, RoHS
- Highest corrosion protection
- Color stability
- Chemical resistance
- Consistent CoF’s
- Fulfillment of all requirements according to ELV, RoHS, etc.
- For demanding applications
- Applicable to zinc and zinc nickel coatings
- Rack and barrel plating
Combined coating systems
For outstanding corrosion protection
Coating systems that combine zinc/zinc nickel, passivation and top coats are capable of providing products with extraordinary corrosion protection as well an appealing and durable appearance. These combined coating systems allow the industry to keep up with increasing demands especially from the automotive industry – for better corrosion protection and improved appearance of electroplated parts.
Black zinc nickel finishes, in particular, are designed to outperform the normal white corrosion performance provided by electrolytic coatings only. The industry also demands for high-end corrosion resistance without any visual changes, e.g. limited white haze.
Atotech has leveraged the best of both corrosion protection technologies to develop coating sequences that fulfill these ambitious requirements. Besides a stable and attractive appearance, even after neutral salt spray testing (NSST), such layer combinations should also exhibit temperature stability, chemical resistance, consistent coefficient of friction values and much more. These coatings must also fulfill all the requirements of ELV and RoHS.
Process examples
