421 Lead and nickel-free rose golden plating process
★Use and characteristics
1.Rose gold is the latest process of our company. The appearance is luxury and elegant, dazzlingly beautiful, bath is easy to control.
2. Rose gold plating is three –element alloy, high hardness, good wear resistance,chemical stability.
3. Rose goldeb is a surface decorative coating, and the cost is lower, application scope is very wide.
★Solution composition and operating conditions
1.Make up method：
Add half of water in the tank heating to 60℃,add the computation of cuprous cyanide and sodium cyanide, stir to dissolve. In another container, add about 1/3 of bath water, add salt and stir the rose Na2SnO3 until dissolved. Finally, add the light agent, add to the required tank liquid volume, stirring evenly to test.
2. Operation condition:
Cyanocuprate 36g/L, 65g/Lsodium cyanide, sodium 20g/L, 30g/L rose golden, 421 brightener 3-5 ml/L, temperature 50-60℃, cathode plating temperature 0.8-1.5A/dm2, PH 10.5-12, yellow copper anode (partial coating graphite plate hanging red).
3. Product catalog：Cyanocuprate, Na2O, rose gold salt, sodium stannate, 421brightener.