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pickling copper


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#1 custommetalman

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Posted 15 March 2011 - 06:15 PM

Can anyone give some input on the best and cheapest way to pickle copper aqfter anealing

#2 teenylittlemetalguy

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Posted 15 March 2011 - 06:25 PM

Really depends on how good you need. When I am in a hurry I use Vinegar with good results.
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#3 BIGGUNDOCTOR

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Posted 15 March 2011 - 10:02 PM

At work we sometimes have to bright dip parts that we zone annealed, and all we use is CLR, same stuff that you use in the bathroom to remove Calcium Lime,& Rust. Takes just a few seconds clean the oxides off.
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#4 custommetalman

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Posted 15 March 2011 - 10:45 PM

At work we sometimes have to bright dip parts that we zone annealed, and all we use is CLR, same stuff that you use in the bathroom to remove Calcium Lime,& Rust. Takes just a few seconds clean the oxides off.



#5 bigfootnampa

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Posted 16 March 2011 - 02:45 AM

I use Sparex #2 which works quite well and is commonly available at jewelry suppliers. I have been told that Ph down, which is sold for swimming pool maintenance, is roughly the same chemical and cheaper besides. You mix them with water to make your pickle solution.

#6 ThomasPowers

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Posted 16 March 2011 - 10:35 AM

An old crock pot marked NOT FOR FOOD USE makes a great pickle holder as you can set it to low and hot pickle works faster!

(and I second Sparex #2/ph minus)
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#7 cavala

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Posted 16 March 2011 - 04:52 PM

Ph down and hydrogen peroxide. When done pickling alot of copper you can use the solution to plate steel, duel purpose

#8 custommetalman

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Posted 16 March 2011 - 05:31 PM

Really depends on how good you need. When I am in a hurry I use Vinegar with good results.





Do you add any salt?

#9 781

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Posted 16 March 2011 - 06:46 PM

For me the easiest to get and cheapest is PH down or PH minus seen it labeled both ways.
I buy it at Walmart. It is for balancing the ph in a pool or spa. According to the label same material as sparex but a lot cheaper. Mix as much as will displve in hot water.

Also good to cleaning scale from iron but dont use the same batch to do both as Iron in the solution used for copper the copper will come out of suspension and coat the steel

Some peole are alergic to it so were gloves and dont get it on skin.
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