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topic 7768

Sulfuric/Peroxide Pickle


I want to clean & polish copper tips ( tellurium copper ) the size of a small thimble ( See letter 7563 ). Marc Green suggested me to look for chemical polishing. I saw in other letters the acid mixture could be replaced by sulfuric/H2O2 pickle.

  1. What is the proper mix H2SO4/H2O2?
  2. Is 10 to 12% H2O2 strong enough to do the job?
  3. What % of ethylene glycol is the best?
  4. How long are the parts dip in the solution?
  5. How this process compares to the acid technique?

Again I really appreciate your help. Thanks.

Yves Duhamel
- Montreal Qc. Canada

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