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How are metal powders used as pigments?

wallpapers News 2021-05-21
Metal pigments are a very fine powder, and most of them are scaly, but also spherical, droplet, dendritic, and their manufacturing methods are related. Metal powder must go through the surface treatment to have pigment characteristics, such as dispersion, hiding power, different surface treatments can make the metal hydrophilic or hydrophilic, adapt to the requirements of different coatings.
How do metallic pigments become powders for specific uses?
Most metallic pigments are produced by physical addition to form pure metals or alloys into specific powders, such as from solid, liquid, and gaseous metals to powders.
1. The gas phase of the metal is transformed into powder, such as the sublimation method to get zinc powder, ultrafine aluminum powder.
2. From the liquid phase of the metal into powder such as pneumatic atomization of aluminum powder, zinc powder and copper and gold powder.
3. Manufacture magnesium powder, aluminum powder, stainless steel powder and titanium powder from solid-state of the metal, such as cutting, ball milling.

What kind of material is commonly used as a metal pigment?
Metal pigments usually used in powder coatings are mainly aluminum powder, copper powder and pearlescent powder. Because the resin or curing agent used in the powder coating is either alkaline or acidic, these metals and metal oxides will have a certain degree of influence, so the surface treatment of metal pigments is particularly important. Nickel powder in the colorless transparent resin is yellow, if it is mixed with other colors of transparent resin, can be made into the gold, orange, yellow-green coating.

Should the color pigment with higher hiding power be used in the powder coating?
In powder coatings containing metal pigments, if colored coatings are to be made, the hiding power should depend on the metal pigments rather than pigments. Had better choose the coloration pigment with lower covering power or transparent pigment, want to use less especially or need not titanium white carbon black.Because the presence of high hiding power pigments will make metal pigments pale.

Performance of the material
Including physical properties (such as specific gravity, melting point, electrical conductivity, thermal conductivity, thermal expansion, magnetic, etc.), chemical properties (durability, corrosion resistance, oxidation resistance), mechanical properties, also known as mechanical properties.
If you want to learn more about metal powder, you can click on the link below:
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