Anodized Aluminum Blanks for laser engraving

Apr 09, 2023

Anodized aluminum blanks for laser engraving is to place the aluminum plate in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, and conduct electrolysis under specific conditions and applied current. The process of placing an aluminum plate as an anode in an electrolyte solution and using electrolysis to form an aluminum oxide film on its surface is called anodizing of the aluminum plate. The cathode in the device is a material with high chemical stability in the electrolytic solution, such as lead, stainless steel, aluminum, etc. The principle of aluminum anodization is essentially the principle of water electrolysis. When an electric current passes, hydrogen gas is released on the cathode; on the anode, the precipitated oxygen is not only molecular oxygen, but also atomic oxygen (O) and ionic oxygen, which are usually represented by molecular oxygen in the reaction. The aluminum as the anode is oxidized by the oxygen precipitated thereon to form an anhydrous aluminum oxide film. Not all of the oxygen generated interacts with the aluminum, and a part of it is precipitated in a gaseous form. The anodic oxide film is composed of two layers. The thick, porous outer layer is grown on the dense inner layer with dielectric properties. The latter is called the barrier layer (also called the active layer).



Anodized aluminum blanks for laser engraving are generally 1060, 1070, 3105, and 5005 alloys. These alloys have good oxidation properties, relatively fine surface oxide film, and good corrosion resistance.

The performance of anodized aluminum blanks for laser engraving are as follows:

Good processability, suitable for laser cutting, bending and forming;
Good weather resistance, suitable for indoor and outdoor use;
Strong metallic feeling, good scratch resistance on the surface, highlighting modern metallic feeling;
High fire resistance, no paint and any chemical substances on the surface, no burning at 600 degrees, no toxic gas;
Strong stain resistance, easy to clean, no corrosion spots;
Strong applicability, suitable for ceilings, curtain walls, panel lights, etc.