Conversion coatings (phosphate layer) of aluminium

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  • Typical parameters of the process
Process Temperature [°C] Heat transfer medium Residence time Chemicals Concentration Details Literature
Alkali phosphoting of aluminium 40-70 (can be lowered to 25-35°C with special bath comeditions) 5-10 sec Aluminium, phosphate and fluoride solutions 2-15 g/l spaying of strip material BAT for the surface treatment of metals & plastics, 2006
1-3 min spaying or dipping of individual parts


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