Anticorrosive glass flake

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This post was last edited by Wang Wei2 on 2024-7-5 at 10:15. Coatings that use glass flake, which possesses excellent chemical resistance, as the main rust-inhibiting pigment are known as glass flake coatings. The thickness of glass flakes is 2–5 microns, which ensures that dozens of layers of flakes are present in the coating. This creates complex and winding paths for penetration and diffusion within the coating. The principle behind this is similar to that of aluminum powder and siderite in coatings; the addition of glass flakes makes the pathways taken by corrosive agents quite tortuous, making it difficult for them to penetrate the substrate. The larger the diameter of the glass flake, both in the longitudinal and transverse directions, the greater the impermeability of the coating. Treating glass flakes with silane coupling agents can improve their strength, impact resistance, and corrosion and wear resistance. It also significantly enhances the adhesion between the glass flakes and the resin, thereby effectively increasing the coating’s impermeability and water resistance. Ordinary coatings find it difficult to resist the diffusion and penetration of corrosive agents in liquid media or in environments with high temperatures. Glass flake coatings, on the other hand, divide the coating into numerous small compartments; they exhibit low shrinkage rates after curing, which **reduces the shrinkage stress of the coating, lowers the residual stress at various contact surfaces, and enhances adhesion. Together with good heat and cold resistance, excellent wear resistance and other mechanical properties, as well as high-quality resins, glass flake coatings possess outstanding corrosion resistance. Common resins used in glass flake coatings include chlorinated rubber, chlorosulfonated polyethylene, epoxy resin, epoxy coal tar pitch, phenolic epoxy resin, unsaturated polyester resin, and vinyl acetate resin.