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  for Metal Finishing since 1989
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Weathering brass screws in a hurry

I have a bag of brass screws that will be used to screw into copper on roofing, trim, gutters, etc. We are needing them to blend in a bit better. My dilemma is that the construction company needs me to get this done by Monday which is 3 days. I have put them sitting in Muriatic acid for a day now and all that I see is a light yellow tint they have take, kinda like sulfur....I need them to turn more of a blackish/bronzish color if possible. PLease help me! I am desperate for any ideas you may have.

Thanks,

Heidi Bain
Construction company employee - Rollins, Montana, USA
2007

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2007

Hello Heidi. liver of sulfur ⇦this on eBay or Amazon [affil links] will significantly darken brass.

This public forum isn't the right resource when a problem is urgent though; the best responses may come weeks or years from now :-)

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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2007

Try a little ferric nitrate. I understand that produces a nice brown on brass.

Dave Wichern
Consultant - The Bronx, New York