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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing 1989-2024
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Zinc Phosphate stripping for coating weight
Q. Hello Community,
surfaces IAW defense specification TT-C-490. In this spec it requires us to strip the phosphate with a solution that is not stripping this coating at all. My supplier has not been able to close the gap on this and I am hoping there is some information in the community that can help.
I there a commonly used process for stripping phosphate on steel that I could use to determine this?
Is there a certain concentration i should be using for this formulation?
Spec Callout----
Matt C
- Lansing Michigan
October 3, 2024
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A. Try solution of chromic acid 50 g/L at about 74 °C for 15 minutes. Repeat until you have constant weight. Do not use this solution again.
Good luck.
Plating Engineer - Lod, Israel
November 25, 2024
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