Conversion coatings (phosphate layer) of steel strip

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  • Typical parameters of the process
Process Temperature [°C] Chemicals Residence time Details Literature
Phosphating 40 hopeite crystal Zn3(PO4)2. 4H20 Solution is circulating in a closed loop BAT for the surface treatment of metals & plastics, 2006
Phosphating iron+steel 70-100 Zn (14 g/l), P2O5 (9,5 g/l), NO3 (21 g/l), freies P2O5 3-20 min BAT for the surface treatment of metals & plastics, 2006


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