Phosphating type Main potion composition Applicable scene Zinc phosphating Zn(H₂PO₄)₂, NO₃-, Ni²⁺, F- Pre-painting treatment (automotive, home appliances) Manganese phosphating Mn(H₂PO₄)₂, Mn(NO₃)₂ Wear-resistant parts (bearings, gears) Iron phosphating NaH₂PO₄, NaClO₃ Low-cost rust prevention (appliance housings)
Selection of Phosphating Processes
Author: Robby
Phosphating type Main potion composition Applicable scene
Zinc phosphating Zn(H₂PO₄)₂, NO₃-, Ni²⁺, F- Pre-painting treatment (automotive, home appliances)
Manganese phosphating Mn(H₂PO₄)₂, Mn(NO₃)₂ Wear-resistant parts (bearings, gears)
Iron phosphating NaH₂PO₄, NaClO₃ Low-cost rust prevention (appliance housings)
Electrolytic phosphating Similar to chemical phosphating + conductive salt High precision, high performance needs (aerospace)
Selection of the appropriate phosphate solution requires consideration of the type of substrate, corrosion resistance requirements, environmental regulations, etc.