Anodized aluminum panels undergo a series of procedures including degreasing, alkaline etching, oxidation and sealing, forming a double-layer structure that combines a dense barrier layer with a porous outer layer. They are compatible with processing techniques like bending and stamping. With a thickness range of 0.3–50 mm and material coverage of 1 to 6 series aluminum alloys, these panels exhibit fire resistance—remaining non-combustible at 600℃. Their surfaces can be colored and feature stain resistance. Integrating metallic texture with weather resistance, this material is suitable for indoor and outdoor decoration, industrial components and fireproof building materials, with a maximum processable size of 8 m × 18 m. However, there are many unscrupulous merchants on the market that pass off chemically oxidized panels as anodized ones to cheat customers.

Genuine Anodized Aluminum Panels

1. General Principle of Oxide Film Formation on Anodized Aluminum Panels
   The process of forming an aluminum oxide film on the surface of an aluminum panel by using electrolysis, with the aluminum panel serving as the anode immersed in an electrolyte solution, is referred to as the anodizing treatment of aluminum panels. In the electrolysis device, the cathode is made of materials with high chemical stability in the electrolyte solution, such as lead and stainless steel. When an electric current is applied, hydrogen gas is released at the cathode. At the anode, oxygen is produced in molecular, atomic (O) and ionic forms; the aluminum acting as the anode is oxidized by the oxygen generated on its surface, thus forming an anhydrous aluminum oxide "film".
2. Types of Anodizing for Anodized Aluminum Panels

   Anodizing can be classified by current type into three categories: direct current (DC) anodizing, alternating current (AC) anodizing, and pulse current anodizing.
   Classified by electrolyte type, it includes sulfuric acid anodizing, oxalic acid anodizing, chromic acid anodizing, mixed acid anodizing, as well as integral color anodizing using electrolytes based on sulfonic organic acids.
   Classified by film property, it covers standard film anodizing, hard film (thick film) anodizing, porcelain-like film anodizing, bright finishing anodizing, and barrier layer anodizing with semiconductor properties.
   Among these methods, direct current sulfuric acid anodizing is the most widely used.

1. Excellent Workability

   Anodized aluminum panels boast strong decorative appeal and moderate hardness. They can be easily bent and formed, and subjected to continuous high-speed stamping, enabling direct fabrication into end products without complex surface treatments. This greatly shortens the production cycle and reduces manufacturing costs.
2. Superior Weather Resistance

   Anodized aluminum panels with a standard oxide film thickness (3 μm) maintain color stability, corrosion resistance, oxidation resistance and rust resistance during long-term indoor use. Panels with a thickened oxide film (10 μm) are suitable for outdoor applications, retaining colorfastness even under prolonged exposure to sunlight.
3. Strong Metallic Texture

   The surface of anodized aluminum panels features gemstone-level hardness and excellent scratch resistance. Free of paint coatings, it preserves the inherent metallic luster of aluminum, accentuating a modern metallic aesthetic that enhances product quality and added value.
4. High Fire Resistance

   As all-metal products with no paint or chemical substances on the surface, these panels remain non-combustible at 600℃ and emit no toxic fumes, complying with fire safety and environmental protection standards.
5. Outstanding Stain Resistance

   They do not retain fingerprints or stain marks, are easy to clean, and will not develop corrosion spots.
6. Wide Applicability

   With versatile uses, they are ideal for metal aluminum ceiling panels, curtain wall panels, aluminum-plastic composite panels, fireproof panels, honeycomb aluminum panels, aluminum veneers, electrical appliance panels, cabinet panels, furniture panels, etc.

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