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letter 31695
Mirror finish on aluminum
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What is the best way to finish aluminum to a mirror finish and
leave no lines at all [besides plating it].
Mike Jenkins
metal finishing shop - Anthony, Kansas, USA
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It would depend on whether the parts are needles or tank trucks or
motorcycle chainguards, and whether they are extrusions or wrought or
castings. But if you search the site you will see where people have
recommended particular grit sequences and polish sequences a number
of times. And then there's bright dipping, and then there's
electropolishing. There just isn't a single answer to a general
question, Mike.
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Ted Mooney, P.E.
finishing.com
Brick, New Jersey
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Since May 2004 we are having problems with our 6061-T6511 aluminum
mirror heads which we machine and have polished, bright-dipped and
clear anodized. We had staining which appeared after the bright-dip
and anodizing, so we changed our coolant and that problem stopped.
Now we have pitting and slits appearing after polishing. We don't
know if it is the material or the polishing. We would appreciate your
input on this. Thank You.
Karen Brannan
- Orange, CA, U.S.A.
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You can also try Burnishing Process. Bur it all depends upon the
component and usage. Can u post a rough sketch, we can suggest a
right tool and process.
Srinivasan
- Coimbatore, India
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