JH-9391 is made up of three packs: A,B and C;
Pack A: It is silver gray slurry that mainly chemically combined
with super fine flake Zn, super fine flake Al and ethylene glycol.
The radius-thickness ratio of Zn plate is 60~100.
Pack B: It is the solvent of the coating colored in orange-red and
in water solution, which contain the Cr6+.
Pack C: It is the tackifier of the coating which mainly made up of
cellulose white or yellowish powder.
Coating Process:
1. Mix Ratio
Pack A:16.0 kg
Pack B:24.0 kg (the quantity can be increased appropriately if
spray coating)
Pack C:0-50 g (according to different viscosity demand )
2. Mixture Method
Before Mixture, Keep weighted A&B into the water bath at 25±2℃
, then stir A to make metal slurry disperse uniformly by frequency
mixer ,after A is fully evenly dispersed, reduce the agitating
speed to 60r/min, and add B.
Add B to the stirring A slowly. At the moment ,the barrel
temperature will go up,when it reaches 35℃, startup refrigerating
device to keep the barrel temperature constant at 35℃.
3. Stir the mixture about 1~2 hours fast after B added, then add C.
C should be powdered if lump exist.(The barrel temperature should
not be lower than 30℃, otherwise C will not be dissolved
sufficiently .)Then stir 12 hours continuously.
4.The coating should be filtrated by 80~100 mesh stainless steel
screen before pouring into dip barrel.
5.Temperature control device should be equipped with dip barrel to
keep the temperature of coating at 22±2℃.(If temp. is too high, the
paint is liable to deteriorate, and viscosity will be effected.)
The coating should be stirred circularly to keep evenly dispersed.
6.Test density,PH,Temperature,Viscosity and Cr6+ content of coating
every 8 hours if operate continuously.
Mix Diagram:
Coating Process:
Attentions:
Other chemicals such as any kinds of acid, alkali salt can not be
mixed into coating, for these can activate Zn & Al plate to aging
the coating.
Avoid irradiation of sunshine and ultraviolet ray for long time
when operating, otherwise it will accelerate aging or
polymerization of the coating .
It is very important to control the temperature of coating. If the
temperature of coating changes when operating, it will effect the
viscosity, then effec the coating quatity on workpiece. So the
relations among temperature,viscosity and spinning process shoud be
controlled well when coating.
The viscosity will be different if coating method is different.
Choose low data if spray coating,and choose high data if dip spin
coating.
Technical data:
| No. | Item | Data |
| 1 | Color | Silver |
| 2 | Coating method | Diping & Spraying |
| 3 | PH | 3.8-5.2 |
| 4 | Specific gravity | 1.30±0.05 |
| 5 | Viscosity | 20~60s(Spray Coating) 60~90S(Dip-Spin Coating) |
| 6 | Operating temperature | 20±2℃ |
