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topic 11689

Scratch resistant electrically conductive aluminum coating


(2001)

I need a conductive coating on aluminum that resists scratches. I have tried gold Alodine, ( AMS C5541 [withdrawn / link is to spec at TechStreet] both class 1A and 3), but they get scratched just by sliding parts on a desk. Is there something more scratch resistant? Would a Chromate work? Or is Chromate just a misnomer for Alodine?

Chris Wagner
- San Jose, California


First of two simultaneous responses (2001)

Chromate is not a misnomer, it's a generic name for the MIL-C-5541 process. Alodine is one brand name. Aluminum can be electroplated with whatever metal would meet your needs, but that would be a far more expensive process than chromating.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


Second of two simultaneous responses (2001)

Consider tin plating.

Dado Macapagal
- Toronto, Ontario


(2001)

Electroless nickel works well for this application.

Todd Osmolski
- Charlotte, North Carolina, USA



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