SurTec 691 Black Passivation for Zinc and Zinc/Iron
	Properties: hexavalent chromium free black passivation based on chromium(III) for rack and barrel application produces black passivation layers on top of alkaline or acid zinc and on zinc/iron high concentrated make-up solutions best results in corrosion protection and appearance can be achieved with subsequent sealer SurTec 558 Black or SurTec 555 S ready to use directly after make-up
	Further Reading Product Information Sheet (PDF-File, 64 KB) Material Safety Data Sheet I (PDF-File, 28 KB), Material Safety Data Sheet II (PDF-File, 24 KB) SurTec 558 Black Sealer for Black Surfaces SurTec 555 S Temper Resistant Sealer

SurTec 691
Black Passivation for Zinc and Zinc/Iron

Properties:

hexavalent chromium free black passivation based on chromium(III) for rack and barrel application
produces black passivation layers on top of alkaline or acid zinc and on zinc/iron
high concentrated make-up solutions
best results in corrosion protection and appearance can be achieved with subsequent sealer SurTec 558 Black or SurTec 555 S
ready to use directly after make-up

Further Reading