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Trivalent Blue without sealer



September 22, 2010

Hi,
1) How many hours can trivalent blue without sealer withstand the salt spray corrosion test?
2) Is Trivalent Blue without sealer the same as corro triblue?
3) What are the difference between Surtec 667 and Trivalent Blue without sealer?
Thanks.

Alison Xie
Employee - Singapore



September 23, 2010

Hi, Alison.

At this point, trivalent chromates are still highly proprietary with little that can be said about them generically. The particular chromate that someone is thinking of may not be intended to be used without a final sealer, and then all bets would be off as to how long it would last in salt spray. But I think the general idea is that the trivalent chromate system should match the performance of traditional hexavalent yellow chromates, i.e., 96 hours.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


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