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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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How to obtain a chalky/powdery anodized finish on 6061
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Q. Looking to obtain a chalky/powdery finish on 6061 for specific product needs. Not referring to etching or blasting- rather chalky/soft in comparison with regular finishes. Some have suggested taking the parts out early, others have suggested nickel acetate sealing. I am not an expert on this matter and am looking for advice to give our anodizers.
Thank you for your time.
Buyer - Niagara Falls, NY, USA
August 26, 2009
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A. This will take a little bit of trial and error, but it almost sounds like you want to take the coating to the point of burning. To do this, higher anodizing temperatures, and higher current densities should be used in conjunction with one another. I don't know if this type of coating would be able to be properly dyed, or sealed.  Marc Green anodizer - Boise, Idaho A. Peter - Colorado Springs, Colorado |
A. Peter,
If you take the parts directly from the anodize tank to a baking soda [in bulk on
eBay
or
Amazon [affil links]
neutralization, the surface gets very white and chalky. I can't speak for any other properties of the coating.
- Grand Junction, Colorado
A. Dear Mr. Brook,
I have made similar trial by using hard water rather than DM or soft water.
The water with high TDS may obtain chalky deposit.
Best Regards
Shafiuddin A. Mohammed
metal coating shop - Dubai, United Arab Emirates
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