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Letter 39040
Anodizing for Mic-6 and C-250
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We use both alloys C-250 or Mic-6 depending on availabilty for our
products. The plates are about 30" x 24" x 0.5". The plates go thru a
procces of Hard anodizing and then black impregnating. We recieve
different shades of black (which is easely seen due to the large size
of the plates). What can we do (process wise) to achive better
consistency in the black color?
Gad Igra
Ekectronics - Israel
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The problem is that MIC-6 is a cast aluminum tooling plate that
was / is designed as a replacement or alternative to 7075
alloy.
On occassion, finding hotspots in the material would not be unheard
of to me. Its been awhile since I had a part of MIC-6 in the sizes
you note (and some larger), but I've seen it before, and repeating
the process, stripping and re-anodizing does not solve the situation.
Its very much a material sourcing issue that can't be resolved
reasonably in a finishing operation most of the time.
Matthew Stiltner
plating company - Toledo, Ohio
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