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Copper parts go black in 10-12 days after vibrofinishing




We get copper tubes or parts vibro finished and get shining finish.But after 10-12 days finish goes away leaving parts dull.How can we avoid it from happening.

RAVINDRANATHA MAROLI
Vibro finishing engineer - India
September 1, 2010


If you would like to avoid tarnishing of copper parts during storage, then you can use VPI coated papers/packs.

Formation of self-assembled monolayers of thiols is one way of preventing tarnishing of copper.

T.S.N. Sankara Narayanan
T.S.N. Sankara Narayanan
- Chennai, Tamilnadu, India
(ed.note: The good doctor offers a fascinating blog, "Advancement in Science" )
October 11, 2010




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