Anodizing is an electrochemical process that can form a strong and durable ceramic layer on the surface of aluminum. The anodized aluminum sheet is resistant to corrosion, ultraviolet rays, and fingerprints. The anodized surface is clear and available in a variety of color options via electrolytic tinting. The surface of the anodized aluminum plate retains its metallic appearance and looks harmonious with any item.
The chemical process is just like the chemical reaction equation that occurs during anodization of acidic electrolyte:
Anodizing process: 2Al+3H2O→Al2O3+6H++6e-
Dissolution process: Al2O3+6H+→2Al3++3H2O
Cathode process: 6H++6e-→3H2
The anodizing process can produce oxide layers with various properties. Therefore, according to different types of anodizing processes, corresponding oxide layers can be produced. Appropriate thickness, decorative or functional, transparent or opaque, colored or non-colored, abrasion resistant or electrically insulating types all can be obtained. The thickness of the anodized film increases with temperature. When it is anodized, regardless of whether it is plated on either side of the anode, the thickness of the film can reach 20 micron.
The anodized aluminum plate has strong decorative properties and moderate hardness. It can be easily bent into shape and subjected to continuous high-speed stamping, making it easy to directly process into products without the complex surface treatments, greatly shortening the production cycle and reducing production costs.
The anodized aluminum plate with a standard thickness oxide film (3μm) will not discolor, corrode, oxidize or rust for a long time when it is used indoors. The anodized aluminum plate with thickened oxide film (10μm) can be used outdoors and will not discolor after being exposed to sunlight for a long time.\
The surface hardness of the anodized aluminum sheet is high, reaching gem level, and having good scratch resistance. The surface is not covered by paint, retaining the metallic color of the aluminum plate, highlighting the modern metallic feel, and improving product quality and added value.
It is without paint or any chemical substances on the surface. And it does not burn at 600 degrees Celsius, which do not produce toxic gases, and meet fire protection and environmental protection requirements.
5. Strong stain resistance
It leaves no fingerprints or stains, is easy to clean, and does not produce corrosion spots.
The anodized aluminum sheet metal is of wide range of uses like metal aluminum ceilings, curtain wall aluminum panels, aluminum-plastic panels, fireproof panels, honeycomb aluminum panels, aluminum veneers, electrical appliance panels, cabinet panels, furniture panels, etc.