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topic 6596

Removing smut from copper surface


I am searching for advice to remove smut that deposited on the copper surface,the smut that I mention is a thin black layer of deposit normally formed after acid pretreatment. Thanks

Benny Lim
- Kuala Lumpur,Malaysia


Tell us:

the composition of the acid, temperature, agitation, analysis of impurities, or if the acid works fine for a while, then starts forming smut, dump the acid more frequently or treat the acid to remove impurities.

pooky tom pullizi signature
Tom Pullizzi
Falls Township, Pennsylvania


Depends on the size of your parts and what treatment they will get in later stages. We mildly etch the top surface off and then barrel the parts to get a clean shiny surface

Mark Camilleri
- Malta

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