Restoring Zinc Alloy Parts: Removal of Plating, Soldering & Chemicals

These methods can be combined with heat or steam to further aid in the restoration process. In summary, there are multiple methods for chemically reducing oxidized patches on zinc alloy parts, including using acid-based solutions, reducing agents, heat, and electrochemical processes.
  • #1
Rodmaru
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Zinc Alloy parts( Zn, with small % of Al, Cu,Pb, etc) become corroded with age. Refurbishing (Restoring) involves removal of all plating, drilling out corrosion pits and filling with zinc solder. Badly corroded parts have patches of oxided metal surrounding the pits. This substantially reduces the strength and workability of the parts. I am looking for a method of chemically reducing these patches back to Zinc.
Are there methods of applying reactive chemicals to the surface of these parts, along with heat (up to 700 degF) and/or steam, gasses, etc. to restore the Zinc metal?
 
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  • #2
Yes, there are several methods of chemically reducing the oxidized patches back to zinc. The most common method is to use an acid-based solution to dissolve the oxide layer, which can then be neutralized and rinsed away. Another method involves using a reducing agent, such as sodium bisulfite, to react with the oxide layer and reduce it to zinc. Heat can also be used to reduce the oxides, but this must be done carefully as too much heat can damage the metal. Finally, there are electrochemical processes that can be used to reduce the oxide layer.
 

1. How do I remove plating from zinc alloy parts?

To remove plating from zinc alloy parts, you can use a chemical stripper specifically designed for zinc alloys. This solution will dissolve the plating without damaging the underlying metal. Be sure to follow the instructions carefully and wear protective gear when handling chemicals.

2. What is the best method for soldering zinc alloy parts?

The best method for soldering zinc alloy parts is to use a low-temperature solder and a flux designed for zinc alloys. This will ensure that the solder adheres properly to the metal without causing damage or warping.

3. Can I use any type of chemical to clean zinc alloy parts?

No, it is important to use a cleaner specifically designed for zinc alloys. Harsh chemicals can damage the surface of the metal and weaken its structural integrity. Always check the labels and make sure the cleaner is safe for use on zinc alloys.

4. How can I prevent corrosion on restored zinc alloy parts?

To prevent corrosion on restored zinc alloy parts, you can apply a protective coating such as a clear lacquer or a rust inhibitor. This will help to seal the surface and prevent moisture and oxygen from reaching the metal, which can cause corrosion.

5. Is it safe to restore zinc alloy parts myself or should I seek professional help?

If you have experience and knowledge in handling chemicals and working with metals, then it is possible to restore zinc alloy parts yourself. However, if you are unsure or do not have the proper equipment and safety gear, it is best to seek professional help to avoid any potential hazards or damage to the parts.

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