Pickling and Super Pickle

by Judy Larson
Since soldering produces fire scale on metal, pickling to remove it is a must.
Instructions
Pickling mixed metal pieces in plain pickle results in plating brass, silver, and nickel silver with a layer of copper.

Super pickle, a mix of half regular pickle and half hydrogen peroxide, solves that problem. Super pickle works fast, so keep checking the piece. The fire scale will separated from the piece but sit on the surface so move it around when checking it.

The second photo shows a copper, brass, and silver piece after it was pickled in super pickle.
Judy Larson's Pickling and Super Pickle - , Metalwork, , plating metal
Judy Larson's Pickling and Super Pickle - , Metalwork, , metal after pickling
After pickling, the surface of the metal has a matte finish, use a toothbrush and water to remove any fire scale still sitting on the surface of the metal.

If the bottom of the piece contacted the bottom of the pickle pot, there may still be fire scale there. It may be necessary to put the piece in super-pickle again.

After the pieces are dry, a quick brushing with a soft bristle steel or brass brush will remove any little pieces of fire scale that were not rinsed away. Brushing will also polish and shine dried pieces to a satin finish.
Judy Larson's Pickling and Super Pickle - , Metalwork, , brush for polishing metal
Judy Larson's Pickling and Super Pickle - , Metalwork, , brushing after pickling
A note on flux and fire scale
Fluxing pieces provides a barrier that will help cut down on fire scale as well as help chip and wire solder flow.

Using paste solder that contains flux helps the solder flow but does not cut down much on fire scale. Since the pieces will have to be pickled anyway, I don't worry too much about using flux on base metal pieces when using paste solder.

I always use flux on sterling silver and gold-filled items, but not always on Argentium, which does not get fire scale in the same way.

No matter what metals are being used, the larger the piece being worked on is, the more likely I am to use flux. Why? Because the piece will be heated longer because of the size.

The longer metals are heated, the hotter they get and the thicker the layer of fire scale could become. Carefully applied texture could be damaged or destroyed

Materials

No materials listed

Tools

Daddy Dipper Pickle Pot, 24 Ounce Capacity
CLN-585.00
  • CLN-585.00
  • Lesson Quantity: 1.00 pieces
  • Purchase Quantity: 1.00 each
  • Price: $45.95
  • Gold Club Price: $34.46
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NATURE'S TOUCH CITRIC PICKLE, 2LB PLASTIC JAR
CLN-163.00
  • CLN-163.00
  • Lesson Quantity: 1.00 pieces
  • Purchase Quantity: 1.00 each
  • Price: $17.95
  • Gold Club Price: $13.46
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Sparex Number 2 Pickling Compound
SOL-802.10
  • SOL-802.10
  • Lesson Quantity: 1.00 pieces
  • Purchase Quantity: 1.00 each
  • Price: $6.95
  • Gold Club Price: $5.21
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  • Category: Metalwork
  • Technique(s): General Education