A contribution to improving the corrosion resistance of substrates can be made by adding fumed silica
to the coating system, especially in the area of a slight corrosion protection.
Fumed silica does not replace the known corrosion protection pigments, but shows an additional protective effect.
In corrosion protection, the surface-treated hydrophobic fumed silica is particularly effective. Due to its hydrophobic properties, this prevents water from penetrating the coating down to the substrate and thus retards corrosion of the substrate.
Another effect is the improvement of the mechanical resistance of the coating. This makes the surface more resistant to scratches, which in the worst case can extend to the substrate surface. These scratches allow water and salts to reach the surface, causing corrosion of the substrate. This corrosion in the scratch can subsequently continue under the coating, infiltrating and detaching it.