Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Forming nonelectrolytic coating before depositing...
Patent
1991-11-27
1993-08-24
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Forming nonelectrolytic coating before depositing...
205167, 205126, 427304, C25D 554
Patent
active
052385507
ABSTRACT:
A process and composition for preparing a nonconducting surface for electroplating. The process comprises contact of the nonconductor with a reaction product of a stannous salt, a noble metal salt and halide ions in acidic solution having a pH not exceeding 3.5. The noble metal salt is present in a amount of from 0.01 and 2.5 grams per liter. The weight ratio of tin to noble metal preferably varies between 150:1 to 700:1. Following contact with the tin-noble metal composition, the surface is contacted with a solution of a sulfur salt able to react with tin and the noble metal to form a sulfide and then electroplated.
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Goldberg Robert L.
Mayekar Kishor
Niebling John
Shipley Company Inc.
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