| 摘要 |
<p>A method is described for the surface finishing or plating of silver and/or its alloys comprising the following passages:
- a washing pretreatment of a silver end-product to be subjected to finishing which comprises:
a) washing in an ultrasound bath with a frequency higher than 40,000 Hertz;
b) subsequent washing of the end-product in a bath containing a solution consisting of perchloroethylene and dichloropropane in a weight ratio ranging from 70/30 to 50/50;
c) washing in a bath with distilled water;
- immersion in a galvanic bath containing a solution of a metal belonging to groups 8, 9, 10 and 13 of the periodic table,
said method being characterized in that the immersion phase in a galvanic bath is effected applying a current intensity which varies from 10 to 25 A/m2 for a time ranging from 50 to 80 seconds.
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