Nickel silver platinum rhodium multilayer composite plating process
A multi-layer composite and electroplating technology, which is applied in the field of electroplating technology, can solve the problems of easy discoloration on the surface of silver-plated workpieces, and easy discoloration on the surface of workpieces, etc., and achieve the effect of bright appearance, stable composite coating and good wear resistance
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Embodiment 1
[0011] Nickel-silver-platinum-rhodium multilayer composite electroplating process includes pre-silver plating process, nickel plating process, silver plating process and platinum-rhodium plating process; the nickel plating process includes the following technical parameters: electroplating solution formula: dissolve 350 in 1 liter of distilled water grams of nickel sulfate, 75 grams of nickel chloride, 55 grams of boric acid, 40 ml of 22 nickel displacer, 1.5 ml of 311 nickel brightener, 2.0 ml of NAW-4 nickel wetting agent, 2.5 ml of W nickel wetting The plating solution temperature is 60°C, the pH value of the plating solution is 4.0, the cathode current density is 2 amperes / dm2, the anode current density is 2 amperes / dm2, and the nickel plating time is 7 minutes; the silver plating process includes the following technical parameters: electroplating solution Recipe: Dissolve 50 grams of silver cyanide, 190 grams of potassium cyanide, 20 grams of potassium carbonate, 15 grams ...
Embodiment 2
[0017] Nickel-silver-platinum-rhodium multi-layer composite electroplating process includes pre-silver plating process, nickel plating process, silver plating process and platinum-rhodium plating process; the nickel plating process includes the following technical parameters: electroplating solution formula: dissolve 280 in 1 liter of distilled water gram (or 330 grams) of nickel sulfate, 62 grams (or 78 grams) of nickel chloride, 52 grams (or 58 grams) of boric acid, 35 milliliters (or 45 milliliters) of 22 nickel displacer, 2 milliliters of 311 Nickel brightener, 0.8 milliliters (or 1.5 milliliters) of NAW-4 nickel wetting agent, 1.5 milliliters (or 3.5 milliliters) of W nickel wetting agent; the temperature of the plating solution is 58 ° C, the pH value of the plating solution is 4.5, and the cathode current density is 3 amperes / square decimeter, anode current density 1 ampere / square decimeter, nickel plating time 8 minutes; silver cyanide or 65 grams of potassium silver ...
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