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Switching from hexavalent to trivalent chromating of aluminum




Q. We're considering switching our product-line from chem. film plating IAW mil-c-5541 to a Trivalent, can you tell me the pros cons? The product-line uses AL bars to hold SS cables in place mostly used on US NAVY ships. The more corrosive applications use SS bars but a vast majority are inside but still needs to pass a 7 days salt spray test IAW Mil-c-5541.

58619

ERIC Jansson
- Oakdale
June 7, 2012



A. Hi Eric.

The MIL-DTL-5541 approved trivalent chromates will be more environmentally friendly and are designed as replacements, so they should meet your need. The biggest disadvantage is probably that they are invisible or nearly so.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha

finishing.com - Pine Beach, New Jersey

Ted is available for instant help
or longer-term assistance.

June 7, 2012




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