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  الخصائص الفيزيائية والكيميائية:

الخصائص الفيزيائية

مظهر:

Colored coated coils usually present a smooth, uniform surface with a variety of color options depending on the coating material and process. The surface finish can range from matte to high-gloss, offering excellent aesthetic appeal and customization possibilities for various applications.

كثافة:

The density of colored coated coils depends on the base material (usually steel or aluminum) and the coating layer. For steel-based coils, the density is generally around 7.85g/cm³, while aluminum-based coils have a lower density of approximately 2.7g/cm³. The added coating layer slightly increases the overall weight but does not significantly affect the density.

نقطة الانصهار:

The melting point of the base material in colored coated coils is relatively high. For steel-based coils, the melting point is approximately 1500-1530℃, while for aluminum-based coils, it is around 660℃. This makes them suitable for use in environments exposed to high temperatures.

معامل التمدد الحراري:

The coefficient of thermal expansion varies depending on the base material. For steel-based colored coated coils, the coefficient is about 11.7×10⁻⁶/℃, while for aluminum-based coils, it is higher, at approximately 23.1×10⁻⁶/℃. These properties ensure dimensional stability under varying temperature conditions.

الموصلية الحرارية:

The thermal conductivity of colored coated coils depends on the base material. Steel has a thermal conductivity of about 50W/(m·K), while aluminum has a much higher value of approximately 205W/(m·K). The coating layer slightly reduces the overall thermal conductivity but provides additional insulation properties.

الموصلية الكهربائية:

The electrical conductivity of colored coated coils is determined by the base material. Steel has relatively low electrical conductivity, while aluminum exhibits high conductivity. The coating layer acts as an insulator, further reducing the overall electrical conductivity.

الخصائص الكيميائية

مقاومة التآكل:

Colored coated coils exhibit excellent corrosion resistance due to the protective coating applied to the base material. The coating forms a barrier against moisture, oxygen, and corrosive agents, effectively preventing rust and degradation. For example, polyester-coated coils are suitable for general outdoor environments, while fluorocarbon coatings offer superior resistance to UV radiation and harsh chemicals, making them ideal for marine or industrial environments.

مضادات الأكسدة:

Colored coated coils have good oxidation resistance, especially when equipped with high-performance coatings such as fluorocarbon or polyurethane. These coatings prevent the base material from oxidizing when exposed to air or moisture, ensuring long-term durability even in challenging environments.

الاستقرار الكيميائي:

In general chemical environments, colored coated coils demonstrate high chemical stability. However, in highly corrosive media such as strong acids, alkalis, or solvents, the coating may degrade over time, affecting its protective properties. Proper selection of the coating type is essential for specific applications.

التخميل:

While passivation is not typically required for colored coated coils, the base material (especially steel) can undergo passivation treatment before coating to enhance its natural corrosion resistance. This involves forming a thin oxide layer on the surface to improve durability.

طلب:

Colored coated coils are widely used in various fields due to their excellent corrosion resistance, aesthetic appeal, and versatility. In the construction industry, they are used for roofing, wall cladding, and decorative panels, providing both functionality and visual appeal. In the home appliance sector, they are used to manufacture refrigerator panels, washing machines, and other products requiring durable, attractive finishes. In the transportation industry, they are used for vehicle panels, trailers, and containers due to their lightweight and weather-resistant properties. Additionally, colored coated coils are indispensable in the manufacturing of signage, HVAC systems, and furniture, adapting well to diverse working environments.