cast brass surface conditioning
Posted by admin on September 22nd, 2009 at 10:38am
Hello all, new guy here with a couple of questions. I do sand casting of brass and aluminum and have a few issues with the surface quality, especially the brass. The surface is ‘pitted’ (the interior is solid) after casting. I’ve tried about every trick I know of to remove all the variables like loose sand, parting dust, trapped gas etc. Is there a process I need to go through to remove or mask the surface pits such as shot peening or glass beading before buffing/polishing? I can get a mirror finish otherwise but the pits show. They are small like pin pricks shot gunned across the surface.
How would I get a satin finish instead of a high gloss.
And last, how do you remove the buffer residue from tight detail spaces? Is there a chemical or procedure?
Thanks!
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Tags: aluminum, anodizing, coating, finishing, metal finishing, Plating, polishing, powder coating
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