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Black passivator for zinc plating
PostTime:2012/5/22 9:43:21    hit:1984
 

Black passivator for zinc plating

 

 

APPLICATION:

For protecting optical parts and other spare parts for special requirement.

 

OPERATING INSTRUCTION:

Chromic acid                     

20g/L

Sulfuric acid   

5ml/L

Passivator A

30~40ml/L

Passivator B

100ml/L

Zinc powder

1g/L

PH 

1~1.5

Temp.

15~30°C

Passivating time 

80~120’s

Time in air

<20’s

Rinse time

<20’s

 

TECHNICAL PROCESS:

Plating Zinc---Rinsing—Pickle dipping—Rinsing-----dipping in distilled water—Black passivating—Rinsing—Sealing—Drying

 
 
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