Process Flow
Degrease alkaline chemically → wash with hot water → remove the rust with acid → wash → wash with running cool water → activate (hydrochloric acid) → wash → plate zinc → recycle → wash → neutralize (nitric acid 2-3%) → passivate → dry and solidify (60-80℃)
Components and Physical Parameter
Component and Physical Parameter Cyanide Free Low cyanide
Component: Zinc Oxide g/l 9-12 7-12
Sodium Cyanide g/l ---- 1-8
Sodium Hydroxide g/l 100-130 100-120
JZ-1 Brightener g/l 4-8 4-8
Cyanide Antidote(not necessary) 4 3-5
Operation Condition:
Temperature 5-40℃
SK: SA 1:1.5-2
Anode 0# zinc plate
Rack Plating: Dk 0.5-4 A/dm2
Cathode Move 8-12 time/ min
Barrel Plating: Dk 0.5-3 A/dm2
Barrel Rotation Rate 6-8 time/min
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