Non-chrome passivation for metal substrates

Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...

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C23C 2202

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active

052942651

ABSTRACT:
Aqueous acid solutions for treating metal surfaces such as aluminum and galvanized steel are disclosed. The solutions are mixtures of organophosphates or phosphonates and chloride or fluoride. The treating solutions can be used in place of chromium treating solutions.

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