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Old 4th May 2011, 05:13 PM   #16
katana
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Join Date: Jan 2006
Location: Kent
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Quote:
Originally Posted by Atlantia
Thats a very interesting thought Alan.
Reverse electro-plating. I know a chap who uses a similar process of reverse electrolosis to remove Verdi Gris from ancient coins while his is on archeological digs. He's made a 'kit' that works off of the car cigarette lighter (with a jam-jar of something to dip the coin and electrodes in I think) I wonder if a home kit could be made for removing chrome/nickel?

I'll be seeing him this weekend, I'll see if he has any idea of how it could be adapted.

Best
Gene



Hi Gene,
found this on an engineering forum........

The proceedure is very much the same as removing rust but with different chemical. First, degrease completely and scrub thoroughly with detergent. Mix 1 cup of Muriatic acid with 3 gallons of water in a plastic bucket. NOTE; ALWAYS ADD ACID TO WATER. NEVER WATER TO ACID !!! (It WILL explode) Hang two or three copper wires (#12 or larger) around sides of bucket. Connect these to ground of battery charger. Hang item to be dechromed in fluid with positive lead connected. Be sure part doesn"t touch ground wires. Within a few seconds or minutes, depending on thickness of chrome, it should come clean. More or less time as required. When finnished, wash parts in mild soda water solution to nutralize acid. (Do this right way to prevent rust) As with any caustic acid, handle with care.

I would add that the fumes are 'unhealthy' so should be done in a well ventilated area.

I should also add that by lowering the concentration of acid, the de-chroming would be slower and more controlable.

Kind Regards David
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