43021

Polarity of Type I Anodize  

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If the tank is the cathode is that hooked up to the positive lead of the rectifier. I heard from an outside lab that the leads were reversed for chromic anodizing. Is this correct?

Chris Rademaker
- Phoenix, AZ, USA

In all anodizing, the positive juice goes to the workpiece, negative to the cathode(s).

Anode - oxidation
Cathode - reduction
"An Ox, Red Cat"

Dave Wichern - The Bronx, New York

I'm positive that I've seen an ox before, but it's a negative on the red cat, David :-)

Ted Mooney, P.E.  finishing.com Brick, New Jersey