ZINC PROTECTIVE COATING
  Process
Compositions & Operating Conditions.
Applications & Features
       
ERICHROME BLUE -DIP- Concentration 4-5 g/l Bulish passivation on zinc plating
-BL - 115 Nitric Acid (tech.) 15-18 ml/l for better corrosion resistance.
  Time 5-15 sec.  
TECHNICAL DATA      
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MILITRY GREEN DIP Concentration 50-100 ml/l dark military green colour protect-
  Time 20-30 sec. -ive coating on zinc plated articles.
       
TECHNICAL DATA      
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YELLOW DIP Concentration 20-30 ml/l Gives yellow irridiscent chromate
  Temperature Room layer.
  Time 20-30 sec.  
TECHNICAL DATA      
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TRIVALENT PASSIVATIONS Concentration 20-30 ml/l Gives a light - blue trivalent
TC-461 Temperature 25-3.5 ° C chromate passivation with S.S.T
  pH 1.4-1.8 of more than 72 hrs.
  Time 25-30 sec.  
TECHNICAL DATA      
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TRIVALENT PASSIVATIONS Concentration 150 ml/l Gives an irridiscent coloured
TC-452 Temperature 60 ° C trivalent-passivation with S.S.T.
  pH 1.8-2.0 of more then 120 hrs.
  Time 60 sec.  
TECHNICAL DATA      
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