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topic 1818

Maximum temperatures for phosphate coatings


Greetings from Denmark

I would be very grateful if you could supply information about the temperatures phosphate coatings on steel (iron- , zinc , zinc/calcium- and manganese-phosphate) can be heated to in air without getting damaged. The phosphate coatings shall be used as pre-treatment prior to heating in oven and polyethylene-coating in a fluidized bed -process.

Looking in the literature is bit confusing, as the maximum temperatures referred range from 150°C to 500°C. However most of the references give a limit of 250-300°C.

Can you help me out of my confusion. Literature references to new results would be very much appreciated.

Best Regards

Torben Jense, Mc. S, Ph. D
- Br¯ndby, Denmark

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