SurTec 668 is a chromium(VI)-free blue passivation for zinc that is suitable for all zinc processes. åÊIt has good corrosion protection with excellent color and brilliance.
- Liquid concentrate with slight precipitate
- Trivalent blue passivation without hexavalent chromium or oxidizing agents
- Contains cobalt, to improve the corrosion resistance
- Produces passivation layers with intensive blue color, even at shorter application times
- Long service-life
- Can easily be analyzed and replenished