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Removing embedded ceramic media
Q. We sometimes receive parts that have been over-tumbled, which embeds ceramic media into the parts, whether alum or steel. No amount of cleaning removes it and the parts do not have the clean finish needed. Parts have been cleaned, plated, stripped and the process repeated with the same results. Parts have been cleaned repeatedly without plating with the same results. We are researching any other method of cleaning such parts. Any suggestions are greatly appreciated.
June Brewer
QA Mgr metal finishing - Pompano Beach, Florida USA
August 15, 2016
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A. Ceramic media is available in different sizes, shapes and abrasive compositions. The reason for so many choices is because of the problem you are experiencing. Meaning, you must select the proper size, shape and comp to do the work you need to get done without causing additional problems. Sometimes that means that you may only have a limited time period before the media wears down too small.If that is your case, you need to either classify (re-sort) media or add new. Your problem is a maintenance issue.
AF Kenton
retired business owner - Hatboro, Pennsylvania
August 17, 2016
What, you mean little bits of fragmented media are embedded in the surface?
Of course, it would be better to prevent the problem to begin with, but you might try a nice, hot electrocleaning step.
Dave Wichern
Consultant - The Bronx, New York
August 17, 2016
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