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Hexavalent chrome conversion coating

We use a hot rinse; 10 min at 55 - 65 grd C after Chrome Conversion Coating of aluminium. ("Bleaching", see ASTM B449 ). The salt fog and paint adhesion properties are the same as a CCC, and the peel + humidity resistance (Wedge test method for testing paint adhesion properties) is slightly better. Maybe this bleaching will also work on a zinc plating.

Rob Wilgenkamp
- The Netherlands
1999

March 6, 2009

Huh? Hello, Rob. Maybe this was intended as an answer or followup on another thread, rather than the start of a new thread? Sorry, but I can't figure out where you're going :-(

Regards,

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