SurTec 668 is a chromium(VI)-free blue passivation for zinc that is suitable for all zinc processes. SurTec 668 has good corrosion protection with excellent color and brilliance.
Performance Features
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
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