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Old 06-12-2006, 04:38 PM
M_D M_D is offline
Amateur Metal Finisher
 
Join Date: Dec 2003
Posts: 223
M_D
Default Re: Sodium Hydroxide (Caustic soda) Alternative

Smut is used as a broad term, and there are several different causes for it, as it can happen in several of the steps in the anodizing process. 6061 isn't as bad as some alloys, but stripping or etching it will produce a smut that is easily removed with the de-smut solution.

Smut that is formed in the anodizing tank, dye tank, or sealer tank is different.

When everything is in balance, I too find the parts will look great after sealing with no additional steps.
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