They include the finishing of refrigerators pressure vessels for fire extinguishers garden furniture electric panels steel fencing car wheels and other car accessories. Iron phosphate pretreatment is the most common pretreatment for powder coating because it can be used with almost any material and has more environmentally friendly by products or sludge.
The degree of success in the devolopment.
Can you powder coat zinc phosphate. We believe that the phosphate will produce a more tenacious adhesion to the base material. If you must use the zinc plating you should shop around for a different source for the plating. Zinc phosphate is a non metallic crystalline coating that is extremely adherent to materials.
This process is commonly used on steel materials. Our ideas are as follows. The other names for zinc phosphate are zinc orthophosphate trizinc phosphate and trizinc diphosphate.
Same chromate as used for passivating zinc. Use a phosphate process developed for zinc base materials. Zinc phosphate coating base for powder coating.
Requires 70 mg sq ft of zinc phosphate and a single powder coating. There are countless applications of powder coating coupled with phosphate pretreatment. This white powder compound is widely used as a corrosion resistant coating which is applied on the metal surfaces which are put as a part of electroplating or as a primer pigment.
In general i would look for an alkaline zinc plate instead of an acid based zinc plate. The zn 3 po 4 2 is an inorganic chemical compound having a chemical name zinc phosphate. You could use a different preparation method such as zinc phosphate or powder primer to get the corrosion resistance.
Requires 70 mg sq ft of iron or zinc phosphate and a zinc rich powder primer or e coat epoxy primer and a powder topcoat two coats in total. Superior corrosion resistance 750 to 1 000 salt spray hours. The adhesion of powder coating after curing with zinc plate surface is very poor and the surface finish not good because some gas and organic additive will be evaporate during curing of powder.
Better corrosion resistance 500 750 salt spray hours. So you must change the finish of surface before you paint it powder like steel and make phosphate for it before powder coating by these method you will increase the adhesion and improve the finish of surface after curing. Use a chromate i e.
Both processes are to be applied before the powder coating operation.