EnglishViews: 237 Author: Julong Publish Time: 2023-09-19 Origin: aluminum panel systems manufacturer
The external wall of aluminum plate is typically treated to increase the decorative effect, increase corrosion resistance, and lengthen the service life. Aluminum surface treatment has become a crucial production step in the aluminum processing process. One of the important techniques for treating the surface of aluminum is fluorocarbon spraying.
With outstanding anti-fading, anti-blooming, anti-corrosion from atmospheric pollution (acid rain, etc.), strong anti-ultraviolet ability, strong fracture resistance, and the capacity to handle adverse weather conditions, PVDF spray coating is a high-grade surface coating technique. utilized frequently in outdoor, large-area aluminum curtain wall constructions. The coatings are made from well-known brands like PPG from the United States, Valspar from the United States, AkzoNobel from the Netherlands, and KCC from South Korea. Three coatings and one baking, four coatings and two baking, and two coatings and one baking are the different coating combinations. PVDF paint made with hylur500 can be used for 25 years without fading. Related product: Pvdf Coating Aluminum Solid Panel.
Spraying with fluorocarbons is a sophisticated surface coating technique. The procedure as a whole has very high-quality standards. The whole surface treatment of the coating manufacturer is applied, except for the need that the fluorocarbon coating manufacturer receive a quality license to make the fluorocarbon coating based on Kynar 500. To guarantee the quality of the aluminum coating, the technological process, comprising the pretreatment process, the spraying process, and the curing process, calls for careful quality control.
The American Building Manufacturers Association standard AAMA-605.02.90 serves as the primary foundation for the fluorocarbon spraying business. The primary worldwide criterion for evaluating the coating's quality is this spraying standard. The South Florida climate, which is renowned for its humidity, high temperatures, and direct sunlight, is referenced as the test standard throughout the AAMA standard because it is thought to be a challenging environment for coating quality testing.
The fluorocarbon coating's performance is what determines how well it performs, and the spraying apparatus must guarantee a great atomization effect to guarantee the consistency of the sprayed layer. The fluorocarbon coating's look is directly impacted by the dispersion of metal particles in the coating. The high-quality fluorocarbon coating is consistent, has a metallic shine, and a vivid hue, and clearly shows three dimensions. With the wrong spraying equipment, fluorocarbon spray coating will result in uneven color, surface shadows, or a thin coating. It significantly impacts fluorocarbon's ornamental effect. High-voltage electrostatic electric spray guns are utilized to create a good spraying effect.
To fully exploit the advantages of Kynar 500 Metallic Paint in terms of durability and weather resistance, the fluorocarbon spraying procedure often uses multi-layer spraying. From the front surface treatment of aluminum to each spraying procedure, strict quality control is necessary, and the finished product must be produced by the United States Industry Association AAMA-605.02.90 Standard.
The fluorocarbon spraying process is as follows:
Degreasing and decontamination of aluminum material→water washing→alkali washing (degreasing)→water washing→pickling→water washing→chromization→water washing→pure water washing
Two coats and one bake: primer coat→top coat coat→baking (180-250℃)→packaging
(time required for production cycle: 4 hours)
Three coats and one bake: primer coating → metal topcoat coating → varnish coating → baking (180-250℃) → packaging
(time required for production cycle: 4 hours)
Four coats and two bakes: primer coating → barrier paint → baking (180-250℃) → topcoat coating (metal topcoat) → varnish coating → baking (180-250℃) → packaging
(time required for production cycle: 6 hours)
The goal of pre-treatment is to produce a chromed film on the workpiece's surface before the aluminum alloy profiles and plates are sprayed. This will strengthen the bond between the coating and the metal surface and improve its anti-oxidation properties, which will help the paint last longer. the membrane's functional life.
As the primer coating of the closed substrate, its purpose is to increase the coating's penetration resistance, improve the substrate's protection, stabilize the metal surface layer, and strengthen the adhesion between the topcoat and the metal surface, ensuring the surface's quality. The paint layer is typically 5–10 microns thick and homogeneous in color.
The topcoat is the crucial spray coating layer. It gives the aluminum material the decorative color it needs so that its look complies with design specifications. It also shields the metal's surface from the elements, including acid rain, pollution, the atmosphere, and sunlight by providing a beautiful color. greatly improves anti-aging properties. When using a spray gun, the top coat is the layer of paint that is the thickest, often measuring 23 to 30 microns.
Another name for varnish coating is overcoat paint coating. The major goals are to successfully raise the paint layer's resistance to external erosion, safeguard the topcoat coating, enhance the color's metallic sheen, and improve the appearance. The coating thickness is typically 5–10 microns, which is stunning. The three-spray coating typically has a total thickness of 40 to 60 microns, though this thickness can be increased as needed.
The three-spray coating typically requires additional curing. The aluminum substance is treated in the curing furnace. The typical curing temperature ranges from 180 to 250 °C, and the curing period is 15 to 25 minutes. a paint job by offering the ideal temperature and timing. According to their own experience, several fluorocarbon spraying plants (curium oil factories) also switched the two-time curing of three sprays to a single curing.
The AAMA-605.02.90 standard must be followed for quality inspection. High-quality spray products can be ensured by strict quality control.
Surface anti-corrosion is crucial for projects using aluminum panel exterior walls. Applying anti-corrosion coatings is the current direct and efficient anti-corrosion measure. Surface treatment is the basis for painting, which has a significant impact on the anti-corrosion effect and service life; the design of the supporting system scheme needs to be related to the corrosion of the aluminum plate. Fluorocarbon paint is used to prevent corrosion of aluminum plates, and each construction link must be operated in strict compliance with the requirements. provides targeted protection that is in keeping with the environment.
