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Black chromate question

Hello
I am a plating shop employee and need to create 10 liter black chromate for zinc electroplating
but I don't know how make it ,please learn to me method or folmula to create this liquid.

thanks.

HASSAN KHALESI
plating shop employee - Tehran, Iran
2007

Hello, Hassan. Here in the USA it is just about unheard of for plating shops to formulate black chromates from raw chemicals; instead they invariably buy the process from suppliers who protect the formulation by patent or as a trade secret. You would need to either search through expired patents and copy an old formulation, or license current technology from a supplier who has invested the development effort. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007

How much do you like pay for the great formula?
How much do you value for the good formula?
How much do you value for the people who expend more than 15 years of their life on formulations?
Are you guaranteeing to keep the formulation for absolutely yourself not for sale?

Ali Showkati
- Tehran, Iran
2007

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