The Role of Precipitated Silica Powder in Metallic Painting 

The application of silicon dioxide in metallic paint is mainly reflected in the following aspects:
Improving the mechanical properties of paint film: Silicon dioxide can significantly enhance the hardness, wear resistance, and impact resistance of metallic paint.
Improving the adhesion and durability of paint film: Silicon dioxide, as a filler or additive in metallic paint, can enhance the adhesion between the paint film and the substrate, and improve the adhesion and durability of the paint film. For example, studies on low-carbon steel substrates have shown that the addition of silicon dioxide helps improve the mechanical adhesion of paint films.
Improving the anti-corrosion performance of paint film: Silicon dioxide has good chemical stability and corrosion resistance, which can effectively slow down the corrosion rate of metal surfaces. Research has shown that silicon dioxide, as a coating additive, can significantly reduce the corrosion rate of metal surfaces.
Enhancing the optical properties of paint film: Silicon dioxide coating can adjust the position and intensity of light absorption and surface plasmon resonance (SPR) absorption bands, thereby improving the optical properties of paint film. For example, in the application of silicon dioxide coating on the surface of metal nanoparticles, the SPR absorption band is adjusted through optical transparency, which improves the optical performance of the metal paint.
Improving the thermal stability and high temperature resistance of paint film: Silicon dioxide has high thermal stability and can maintain its physical and chemical properties unchanged in high temperature environments, thereby enhancing the heat resistance of metal paint. For example, the application of nano silica in coatings can significantly improve the thermal stability and high temperature resistance of paint films.
As a matting agent and rheological aid: Silicon dioxide can also be used as a matting agent and rheological aid to reduce the light reflectivity of the paint film surface by forming a slightly rough surface, thereby achieving a matting effect.
Silicon dioxide is widely used and has significant effects in metallic paint. It not only improves the mechanical properties, adhesion, and durability of the paint film, but also enhances its corrosion resistance, optical properties, and thermal stability, making it an important additive in the field of metallic paint.

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