Black coated aluminum sheet is a chemically pre-treated aluminum sheet that is then coated with one or more layers of organic coatings, such as roller coating or spray coating, and then baked and cured to create a black coating. Fluorocarbon or polyester coatings are typically used for color coating, these coating offers numerous advantages and is widely used in architecture, advertising, transportation, home appliances, electronics and other fields.
Common Specifications
- Thickness: Generally ranges from 0.1mm to 6.0mm, with thickness requirements varying depending on the application. For example, building curtain walls often use aluminum sheet thicknesses of 1.5mm to 3.0mm, while electronic equipment casings may use thinner sheets, such as 0.3mm to 1.0mm.
- Width: Common widths range from 300mm to 2000mm, though some manufacturers can produce wider sheets. Chalco, for example, produces double-sided black coated aluminum sheet coils up to 2630mm wide.
- Alloy Series: Common alloy series include the 1000 series, 3000 series, 5000 series, and 6000 series. For example, 1060 aluminum sheet offers excellent ductility and corrosion resistance, 3003 aluminum sheet offers good machinability and weldability, 5052 aluminum sheet is suitable for marine environments or humid conditions, and 6061 aluminum sheet offers high mechanical properties.
Black coated aluminum sheet has a wide variety of coating materials, each with varying performance and application scenarios. Common coating materials include the following:
1. Polyester (PE) Coating
- Features: Polyester coating is one of the most widely used coating materials, offering excellent weather resistance, flexibility, and gloss retention at a relatively affordable price. It has strong adhesion, bonds well to the aluminum sheet surface, and offers excellent processability, making it suitable for a variety of molding processes.
- Applications: Suitable for relatively stable environments such as interior decoration, furniture panels, and appliance housings. It can also be used for light outdoor decoration in some temperate climates.
2. Fluorocarbon (PVDF) Coating
- Features: Fluorocarbon coatings, primarily composed of polyvinylidene fluoride, offer excellent weather resistance, corrosion resistance, and UV resistance. They withstand harsh environments such as acid rain, strong UV rays, high temperature, and high humidity, maintaining excellent color retention and providing a long service life (typically over 20 years). Furthermore, they are chemically stable, resistant to contamination, and easy to clean.
- Applicable Applications: Widely used in outdoor building curtain walls, roofs, signboards, and other applications exposed to the elements for extended periods. They are particularly well-suited for coastal areas and areas with high pollution levels, where corrosion is more severe.
Performance and Characteristics of Black Coated Aluminum Sheet:
- Corrosion Resistance:
The coating effectively isolates the aluminum sheet from the external environment, preventing oxidation and rust. Fluorocarbon coated black aluminum sheets, in particular, offer excellent weather resistance, resistance to acid rain and UV rays, and a long service life.
- Decorative Effects:
The black coating offers a uniform, rich color and can be achieved in a variety of finishes, including glossy and matte. It meets the aesthetic and stylish demands of modern architecture and decoration, adding a sense of dignity and elegance to the product.
- Processing Performance:
Inheriting the excellent processing properties of aluminum sheet, it can be processed through various operations such as cutting, bending, stamping, and welding, making it easy to form components in various shapes and suitable for a variety of engineering and decorative projects.
- Mechanical Properties:
Coated aluminum sheet inherently possesses high strength and toughness. After color coating, its surface hardness is further enhanced, and its wear and scratch resistance is enhanced, while still remaining lightweight, making it easy to handle and install.
Applications of Black Painted Aluminum Sheet:
- Architectural Decoration:
Commonly used in building exterior walls, roofs, curtain walls, and ceilings, such as those on commercial buildings, airports, and high-speed rail stations, enhancing the overall appearance of large buildings.
- Home Decoration:
Suitable for furniture panels, cabinet panels, and appliance panels. The black appearance is stylish and easy to clean and maintain, complementing various home decor styles.
- Electronic Devices:
Suitable for housings of electronic devices such as mobile phones, tablets, and laptops, providing a good appearance while meeting the device's requirements for heat dissipation and corrosion resistance.
- Signage: Due to its excellent weather resistance and striking visual effect, it is often used in outdoor billboards, signage, doorplates, etc., maintaining a clear appearance in various environments.
Black coated aluminum sheet, due to its lightweight, corrosion-resistant, highly decorative, and easy processability, is an ideal material for architectural, industrial, and residential applications. With advances in surface treatment technologies (such as anodizing and fluorocarbon spraying), its application scenarios will continue to expand, and the market prospects are promising.
