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How to remove stain from copper Blocks ?? - Page 2

post #11 of 51
try with cilit bang. I read somewhere that it's magic for stains on copper.
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post #12 of 51
It should be noted that brasso (wad and liquid form) is a fine abrasive material, excess use on copper surfaces without some kind of levelling surface can cause pitting.
Basically, don't over scrub, use to remove surface discoloration (oxidization) of copper should be fine.
    
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post #13 of 51
Quote:
Originally Posted by xaero252;14364226 
it should be noted that brasso (wad and liquid form) is a fine abrasive material,

not good at all!frown.gif
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post #14 of 51
Thread Starter 
so not brasso?
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post #15 of 51
Quote:
Originally Posted by DirectOverkill;14364182 
try with cilit bang. I read somewhere that it's magic for stains on copper.

That only to be used on steel it seems.

"Cillit Bang Power Grime and Lime Cleaner Trigger
The Cillit Bang Power Grime and Lime Cleaner Trigger product contains two acids: sulfamic acid and phosphoric acid. Phosphoric acid (also known as orthophosphoric acid or phosphoric (V) acid) is a weak mineral acid with the chemical formula H3PO4 and applied to rusted iron or steel tools or surfaces to convert iron (III) oxide (rust) to a water-soluble phosphate compound.
This cleaner can be used on glass, acrylic plastic, ceramics (wash basins, toilet bowls, etc.), wall and floor tiles, PVC floor coating, chrome and kitchen tops.
It should not be used on any acid sensitive material, such as marble or enamel, aluminium, copper, stone, zinc-plated metals, kitchen worktops, linoleum, varnished, waxed or oiled wood floors, rubber, textiles or carpets."
     
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post #16 of 51
Quote:
Originally Posted by Xaero252;14364226 
It should be noted that brasso (wad and liquid form) is a fine abrasive material, excess use on copper surfaces without some kind of levelling surface can cause pitting.
Basically, don't over scrub, use to remove surface discoloration (oxidization) of copper should be fine.

All polishes are super fine abrasives, and surface level will not be an issue with Brasso. The surface will be cleaned in a few wipes. It would take a lot of Brasso and rubbing to distort or eating away at the surface. Pitting will not be a result of using polish. Pitting is from corrosion due to chemical reaction, not polishing.
     
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post #17 of 51
Try this and see if it works. Take apart the block. Bring a pot of water to just before boiling and reduce the temp to keep it there and prevent boiling. Put in some salt and lemon juice and the copper parts of the block. After 15 minutes, let cool and clean off with normal water & soft paper towel, then rinse with distilled water.
    
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post #18 of 51
If you'd mix water and cilit in 1:10-20 ratio, that would significantly drop acidity of liquid.
Ppl clean stuff with it with bear hands. Can't be that bad?
I swear I have heard it somewhere that it does the job.
Well, I' ll take a look somewhere among my old stuff and see if I have some oxidated copper blocks left.
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post #19 of 51
Quote:
Originally Posted by DirectOverkill;14366301 
If you'd mix water and cilit in 1:10-20 ratio, that would significantly drop acidity of liquid.
Ppl clean stuff with it with bear hands. Can't be that bad?
I swear I have heard it somewhere that it does the job.
Well, I' ll take a look somewhere among my old stuff and see if I have some oxidated copper blocks left.

Hmmm, that should work I guess. As long as its not full strength. I know I've pitted metals before with chemicals, so try to not use them as much. If I do, I use it carefully and do not soak them what so ever.
     
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post #20 of 51
I use Brasso. It gives a good shine and leaves a very fine protective film on the copper. For that reason only polish the parts that are going to be visible. It will tarnish again over time. To avoid that use brasso, clean with Isopropyl Alcohol then use a protective lacquer on the visible parts, not the parts that will be in contact with water. I've used clear lacquer designed for use with car paints but there are better ones available.
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