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04-18-2005, 09:34 PM
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#1
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Pro
Trade:
Carpenter
Join Date: May 2004
Posts: 5,549
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Cleaning Copper Runoff
Buddy of mine is starting a painting/powerwashing business. A customer wants him to powerwash his concrete driveway to wash of the green staining running off from a copper roof. Anyone know what will work? Thanks.
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04-18-2005, 10:42 PM
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#2
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Painting Contractor
Trade:
Painting Contractor
Join Date: Mar 2005
Location: Milwaukee, WI
Posts: 1,176
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What about an acid wash?
__________________
Just because some of us can read and write and do a little math, that doesn't mean we deserve to conquer the Universe. Kurt Vonnegut, (1922 - 2007) from the Novel 'Hocus Pocus'
The NAPP
Milwaukee Painting Contractor
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04-18-2005, 11:48 PM
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#3
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Chief Toilet Mover
Trade:
Bathroom Remodeling
Join Date: Apr 2004
Location: Littleton, Colorado
Posts: 11,758
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I have heard of using Sure Klean's ferrous stain remover product to get rid of copper on brick and concrete. I don't think you need to powerwash it, just scrub it with a brush I believe. They might even have a specific copper stain removing product now.
(Damn, I hope I am not violating any codes by saying "I have heard" or "I believe") lol
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04-19-2005, 03:08 AM
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#4
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Commercial construction
Trade:
Commercial construction
Join Date: Dec 2004
Location: Upstate New York
Posts: 601
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Quote:
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Originally Posted by Humble Abode
What about an acid wash?
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Yup, you're right. Muriatic acid, it's diluted hydrochloric acid, be careful.
www.epa.gov/ttn/atw/hlthef/hydrochl.html
(Hope is not a method.)
Last edited by mikesewell; 04-19-2005 at 03:37 AM.
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04-19-2005, 06:43 AM
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#5
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Pro
Trade:
Carpenter
Join Date: May 2004
Posts: 5,549
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Thanks, guys, - - and thanks for the link, Mike S.
Mike F., - - thanks, - - he just got a brand new, shiny, expensive power washer, - - so I think he's kinda' lookin' for an excuse to use it 
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04-19-2005, 10:27 AM
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#6
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Commercial construction
Trade:
Commercial construction
Join Date: Dec 2004
Location: Upstate New York
Posts: 601
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You're welcome Tom, I'm glad I could help. I didn't pay as much attention in chemistry class as I should have, and I have had to re-learn much of it on my own. I'm glad that I did, it has given me a big edge, and saved me much time and money.
For anyone who is interested in chemistry, this is the best site that I have ever seen:
www.webelements.com
It got 65 million page reviews in 2004.
Best regards,
Last edited by mikesewell; 04-19-2005 at 10:37 AM.
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04-19-2005, 09:51 PM
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#7
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Pro
Trade:
Carpenter
Join Date: May 2004
Posts: 5,549
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Wow, - - cool site. That one goes right to my 'favorites'.
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04-20-2005, 03:57 AM
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#8
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Commercial construction
Trade:
Commercial construction
Join Date: Dec 2004
Location: Upstate New York
Posts: 601
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Glad you like it, there's a tremendous amount of information there.
Best wishes,
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04-30-2005, 09:11 PM
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#9
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New Guy
Trade:
Join Date: Jul 2004
Posts: 25
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Quote:
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Originally Posted by mikesewell
Yup, you're right. Muriatic acid, it's diluted hydrochloric acid, be careful.
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Yep, it'll clean concrete very well.
Be careful is right, it's deluted hydrochloric acid, but you'll still have to delute it even more with water.
About 20% muriatic acid to 80% water(about 1/4 gallon acid to six gallons of water), if you put it on straight you won't have any concrete left, you won't have a happy customer either.
And pour the acid into the water, not the other way around.
Fill a large bucket close to full with water, then add the acid, wear rubber gloves, safety goggles, and old clothes.
Even deluted the stuff will eat holes in your clothes, not when it gets on them, but after you wash them, they'll have holes in them anywhere you got the acid on them.
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