Tabla de detalles del producto:

Propiedades físicas y químicas:

Propiedades físicas

Apariencia:

Aluminum coils typically present a silvery-white metallic color with a smooth and bright surface. Different surface effects can be achieved through various surface treatment processes, such as mirror polishing, brushing, anodizing, or coating.

Densidad:

The density of aluminum is relatively low, approximately 2.70g/cm³, making it about one-third the density of steel. This lightweight characteristic makes aluminum coils highly desirable for applications where weight reduction is critical.

Punto de fusión:

The melting point of aluminum is relatively low compared to other metals, generally around 660℃. This allows for easier processing during manufacturing while maintaining stability in moderately high-temperature environments.

Coeficiente de expansión térmica:

The coefficient of thermal expansion of aluminum is relatively moderate, approximately 23.1×10⁻⁶/℃ (at room temperature). This property ensures that aluminum coils maintain dimensional stability in environments with temperature fluctuations.

Conductividad térmica:

Aluminum has excellent thermal conductivity, with a thermal conductivity coefficient of about 205-250W/(m・K), which is significantly higher than stainless steel and comparable to some copper alloys. This makes aluminum coils suitable for heat exchange and thermal management applications.

Conductividad eléctrica:

Aluminum exhibits good electrical conductivity, approximately 37.7×10⁶ S/m, which is about 60% of that of copper. This property makes it widely used in electrical applications, especially where weight savings are important.

Propiedades químicas

Resistencia a la corrosión:

Aluminum forms a natural oxide layer on its surface when exposed to air, providing excellent corrosion resistance. This oxide layer prevents further oxidation and protects the metal from environmental factors such as moisture and oxygen. Aluminum performs well in atmospheric and marine environments but may require additional protective coatings in highly corrosive conditions.

Antioxidación:

Aluminum has good oxidation resistance due to its ability to form a stable oxide layer. However, at very high temperatures, prolonged exposure may lead to increased oxidation, so protective measures like coatings are often applied for high-temperature applications.

Estabilidad química:

In general, aluminum exhibits good chemical stability and does not react easily with most chemicals. However, it can be affected by strong acids (e.g., hydrochloric acid) and alkalis (e.g., sodium hydroxide), which can lead to corrosion.

Pasivación:

The natural passivation of aluminum occurs when exposed to air, forming a thin but durable oxide layer. This layer enhances the material’s corrosion resistance and can be further improved through anodizing or chemical treatments.

Solicitud:

Aluminum coils are widely used across various industries due to their lightweight, corrosion resistance, and excellent thermal and electrical conductivity. In construction, they are used for roofing, cladding, and insulation materials. In the automotive industry, aluminum coils are utilized in body panels and structural components to reduce vehicle weight and improve fuel efficiency. In HVAC systems, they are employed in heat exchangers and air conditioning units due to their superior thermal conductivity. Additionally, aluminum coils are indispensable in the packaging industry for making beverage cans and foil wraps. In electrical engineering, they are used in power transmission lines and electronic components, offering a cost-effective alternative to copper.