Anodized aluminum sign panel

Under natural conditions, a thin oxide layer with a thickness of 40-50um is formed on the surface of aluminum and aluminum alloy plates. This oxide layer is amorphous, which makes the surface of the aluminum plate lose its original luster. This natural aluminum oxide will make the surface Passivation, but because it is too thin, has large porosity and low mechanical strength, it cannot be effectively used as a protective layer. The electrochemical oxidation method can obtain an oxide layer of tens of micrometers on the surface of the aluminum plate. The anodized aluminum sign panel produced has excellent appearance ability, especially after the sealing treatment, it can further improve the corrosion resistance. Anodized aluminum sign panel has a small specific gravity, no sulfur, high mechanical strength and good processability, especially suitable for manufacturing sign panels. After oxidation, its excellent decoration, reflectivity, corrosion resistance and insulation are also known as the preferred material for instrument dials and electronic and electrical indicator plates.