[China Aluminum Industry Network] Aluminum powder has a silver-white metallic luster, so it is commonly called aluminum silver powder or silver powder. Its chemical composition is actually "aluminum", not "silver".
Applications: powder coatings, inks, plastic masterbatches, printing, imitation gold paper, imitation gold cards, gold films, textiles, water-based paint.
In the use of electrophoretic paint, if the update rate is not enough, there will be oxidation and darkening trend, but the combination of aluminum silver paste and electrophoretic paint is a new highlight of metal surface treatment! It is in line with the new trend of green environmental protection surface treatment.
When using electrophoretic paint, pay attention to the following points:
a. The silver paste itself is a ductile thin sheet of malleable outer coating, with too high acid and base values, long idle (itself slowly oxidizing) and high speed stirring will damage the surface coating and Its own integrity, resulting in dark paint, hiding power, paint film coarse particles and other undesirable phenomena, this phenomenon, should adjust the process and frequency of use, stirring speed (less than 500 rev / min) Maintain stability.
b.Because the ratio is significant, it is easy to precipitate. Therefore, the design of the tank body should not be as deadly as possible. The return pipeline should pay attention to the design of the workpiece to be machined. The equipped motor can not use the magnetic pump and can not generate heat. The mechanical chemical speed control pump is better. , With the frequency converter, you can easily control the flow rate, otherwise it is easy to produce precipitation, back to coarse, dark, high and low chromatic aberrations and other defects. It is better to use a bag filter.
c. If the product appears black, the phenomenon of yellowing may also be in the preservation of the product, the poor sealing caused oxidation of aluminum paste to black, please re-sample, pay attention to the seal. If yellowing occurs, the main reason is that the baking temperature is too high.
d. Particles appear on the surface of the workpiece, which may turn black due to poor dispersion. They may not be fed for a long time or may be insufficiently supplied or may be caused by impurities in the product. If the particles present in the product contain impurities, they should be used before use. After the cloth is filtered, the working fluid (200 mesh) should be used.
e, pay attention to save: storage temperature is 15 ~ 30 °C. Avoid direct exposure to sunlight, rain, or excessive temperatures.
f, to ensure that the storage temperature is not less than 15 °C (in the winter or when the ambient temperature is equal to or lower than 10 °C should pay special attention).
g, aluminum silver paste working fluid can not be directly ultra-filtration, the need to separate the silver paste and the bath, and then the bath ultrafiltration.
h, aluminum silver paste working fluid to ensure that there is a certain amount of replacement, within one month to complete the slot with the concentration of paint, aluminum paste, the replacement cycle is 1 month.
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