Method for removing scale from silver articles using an aqueous

Details Method for removing scale from silver articles using an aqueous Method for removing scale from silver articles using an aqueous

1995-07-03

1997-09-23

Warden, Jill

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 3, 134 28, 134 41, B08B 312, C23G 102

Patent

active

056699786

ABSTRACT:
A silver pickling method employing aqueous oxalic acid solutions that removes tightly adherent scale at room temperature, as well as elevated temperatures, that does not tend to plate contaminants onto silver articles due to the accumulation of copper ions in a pickle solution, and that does not aggressively attack solder joints is provided. The silver pickling method comprises the steps of contacting the surface scale of a silver article, such as jewelry, with a solution of oxalic acid and water; maintaining the solution contact with the surface scale for a period of time sufficient to loosen the scale; and removing the surface scale from the article.

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