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Construction Masonry MaterialsPaint
Silicon dioxideSiO2 Nanoparticle /Nanopowder CAS Number : 7631-86-9
This product is known as powder paint containing SiO2 nanoparticles with an amorphous crystalline structure. The average particle size of silica is 48 nm. This product indicates the improvement of corrosion resistance due to the presence of silica nanoparticles. The addition of nano silicon dioxide to paints can improve the macro- and micro-hardness, abrasion, scratch and weather resistance. The corrosion protection efficiency is improved when nanoparticles are incorporated and dispersed into paint media. However, it decreases the elasticity of the paints, which is needed to resist the swelling and shrinking associated with temperature and humidity changes.
Corrosion is a natural process, which converts a refined metal to a more stable form, such as its oxide or hydroxide. It is the gradual destruction of materials (usually metals) by chemical reaction with their environment. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases. The amount by which a corrosion coating reduces the rate of corrosion varies, depending on the kind of metal and its environment, and is notably slower in room-temperature air for aluminum, chromium, zinc, titanium, and silicon. SiO2 is an excellent anticorrosion material since of its excellent corrosion resistance, thermal stability and less conductivity because of very less free electrons with them. Its inertness and low cost make silica an excellent filler and extender for paint. Adding silica to paint creates textural and bodying qualities in oil paint without affecting the color. Silica has little color in drying oil, so it can be added to oil paint without affecting the tint of the color. Due to its hardness it tends to add a discernible texture to paint.