REPELLENCY PREVENTIVE SOLUTION FOR SILVER PLATING OR SILVER PLATING SOLUTION

摘要

PURPOSE:To prevent a silver plating soln. from being repelled by a copper material and to obtain a good silver plating at the time of using a substitution preventive agent in the plating of a copper material with silver by pretreating the copper material with a soln. having a specified content of an amino compd. having a pyridine skeleton, etc. CONSTITUTION:When copper or a copper alloy is plated with silver, a substitution preventive agent such as 2-mercaptobenzthiazole is preferably used to prevent the deposition of silver by substitution. However, the surface of the copper material is repellent when the agent is used. Accordingly, a repellency preventive soln. contg. an amino compd. (2-aminopyridine, etc.,) having pyridine, pyrimidine, pyrrolidine and piperazine skeletons by 0.1-100g/l in the case of solid and 0.1-100ml/l in the case of liq. is used to pretreat the copper material. Consequently, the copper material is excellently plated with silver.