Letter 32030

Formulation of chromating solution  

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How to make chromic acid solution for post-galvanization treatment? What chemicals should be used and in what concentration? Pot. di chromate or Chromium hexa oxide or else, which chemical. Thanking you. Regards

M Tonpe
DU - Delhi, India

Your best source of formulation information is expired patents, M. But this is not pancake batter that you mix up on a kitchen counter from a dollop of this and a pinch of that; the manufacturing process is hazardous from beginning to end and you need to retain an experienced consultant to assist in the plant and process design, not get a formulation from the internet. Good luck!

Ted Mooney, P.E.  finishing.com Brick, New Jersey

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