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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