Glassflakes create a protective barrier to surfaces by making it difficult for corrosive gas and liquid particles to reach the substrate. The average path length to the substrate is substantially increased by the tortuous path created by the layering of the Glassflakes. These long and tortuous paths drastically reduce the number of particles that actually reach the substrate. The life of the surface is prolonged by this great reduction in permeation, not to mention the long service life of the Glassflakes themselves. To maximize these protective capabilities, the flakes must be as broad as possible for increased lateral path length, and as thin as possible so more layers can be stacked.
Think about the original Donkey Kong arcade game: it would be much easier to reach the princess if there were fewer crossbeams, or if they were half as long. That’s why Glassflakes come in high aspect ratios (surface area to thickness) and thicknesses as low as 50-150 nm.
Benefits of Glassflakes in anti-corrosion coatings include:
- Reduced moisture vapour transmission rates
- Thermal expansion coefficient similar to steel
- Increased weathering stability
- Chemical resistance
Glassflakes are used across many systems, including but not limited to:
- Solvent and waterborne coating systems
- Powder coatings
- Thin film systems (20 microns) to high build systems +800 microns
For more information contact Don Picchietti at [email protected]