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Formula for plating sol'n using Chromic acid, Phosphoric acid and Urea?




I am trying to reproduce a plating solution formula we used a long time ago. The only info I can get is that it is 90 chromic acid/10 orthophosphoric acid, with some urea, at saturated concentration in deionized water. Is this a common formulation? Can anyone provide LB/GAL or g/L for the ingredients? Is deionized water a necessity? Can distilled water be used instead? Is there a suitable online source for such information?

Thanks,

Ernie Puskas
- Barberton, Ohio, USA
2003



Although you have called this a plating solution, you haven't identified what it is supposed to do. Is it supposedly a chrome plating solution? For decorative, black, or hard chrome? It sounds a bit like an electropolishing solution, and also sounds a bit like a colorizing solution for stainless steel. So what is it that you are trying to do with this solution?

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha

finishing.com - Pine Beach, New Jersey

Ted is available for instant help
or longer-term assistance.

2003


Probably an electropolishing solution. We supply this to an outside contractor for application. They use our material in their process.

Ernie Puskas
- Barberton, Ohio
2003




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