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2021
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The Role of Water-Based Insulating Paint Resin in Electrical Equipment
Water-based insulating paint resin serves as a UV-resistant stabilizer; as a pigment, the reinforcing agent enhances the material's mechanical properties, increases its opacity, reduces costs, and even alters its electrical and thermal conductivity. Before curing, it remains in liquid form, exhibiting excellent flowability. The viscosity of the adhesive varies depending on the product’s materials, performance requirements, and manufacturing process.
Ordinary epoxy resins soften or even char at temperatures above 100°C. In contrast, water-based insulating paint resins remain stable and do not soften even at high temperatures as high as 120°C. On the contrary, their performance actually improves over time and with increasing temperature, becoming harder and exhibiting even better adhesion. During production, the particle size of the pigment carbon black is carefully controlled between 800 and 1,000 mesh. If the particles are too fine, carbon black’s hygroscopic properties increase, making storage more challenging. In cases of excessive humidity, drying equipment should be used to prevent moisture absorption. Additionally, cotton fiber tubes—known for their poor heat resistance, moisture resistance, and mold resistance—are gradually being replaced by fiber and synthetic fiber tubes, which offer superior performance in these areas.
So far, water-based insulating paint and resin coating pipelines have mostly relied on low-grade glass fibers, with the main coatings including oil-based insulating varnishes, alkyd paints, acrylate paints, silicone paints, silicone rubber, and modified polyvinyl chloride.
Water-based insulating paint resin is used to isolate energized components with different potentials in electrical equipment. Therefore, the insulation material should first possess high insulation resistance and dielectric strength to prevent accidents such as leakage current and breakdown. Second, it must exhibit excellent heat resistance to avoid aging caused by prolonged overheating. Additionally, the material should also offer good thermal conductivity, moisture resistance, and lightning protection, while maintaining high mechanical strength and ease of processing.
Precautions for applying water-based insulating paint resin:
1. Applying Graphite Coatings: Regardless of the coating applied to graphite, always start with a metal transition layer; for particularly poor-quality graphite surfaces, apply a fiber-based transition layer instead.
2. Small water-based insulating paint resin materials require thermal insulation: Small objects often have high surface tension, torsional strength, and tensile strength, making them prone to peeling and cracking after applying heat-resistant or other coatings. When painting, it’s best to incorporate mesh fabric or metal mesh into the paint itself. Mesh fabrics come in varieties such as glass mesh, ceramic mesh, and cloth mesh.
3. After removing rust with a wire brush, use high-purity alcohol to degrease the surface.
4. The paint must be applied to the goose's body, and the source of the paint matters.
5. There are potassium ions, hydrogen ions, ethyl acetate, hydrofluoric acid, concentrated sulfuric acid, concentrated hydrochloric acid, nitric acid, aqua regia, and more—each requiring the formulation of a specific anti-corrosion coating tailored to its unique conditions. Some coatings, however, cannot withstand the corrosive media or high-temperature corrosion mentioned above.
6. The 800°C high-temperature anti-corrosion coating applied by brushing water-based insulating paint resin becomes harder as the coating is left to sit for longer periods.
7. After sintering at 800°C, the coating becomes dense. If the coating is not sintered at temperatures above 800°C, it will not be waterproof.
8. The curing time for the inorganic coating should be 2 hours. If the curing environment fails to meet the required conditions, the inorganic coating will begin to chalk after 2 hours.
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