Surface Treatment Methods for Perforated Sheets of Different Materials

Perforated sheets, commonly used in construction and industrial applications, come with various surface treatments to meet aesthetic, anti-corrosion, and durability requirements. Different surface treatments, including spray painting, powder coating, fluorocarbon spraying, galvanizing, anodizing, and electro-polishing, are selected based on the material of the perforated sheet and the specific use environment.
 
Spray Painting: Spray painting is commonly used for perforated sheets made of iron and aluminum. This treatment enhances the corrosion resistance and appearance of the perforated sheet, making it ideal for decorative mesh. It effectively changes the color of the perforated sheet and has strong decorative effects, typically used in environments where corrosion resistance is not a primary concern.

Powder Coating: Powder coating, or electrostatic powder spraying, is a popular anti-corrosion treatment. Compared to traditional spray painting, powder coating uses static electricity to evenly attach plastic powder to the surface of the perforated sheet, which is then heated and cured. This method provides superior corrosion resistance, higher surface brightness, and faster production speed at a lower cost. Powder coating has gradually replaced spray painting as the mainstream treatment in the perforated sheet industry, especially for outdoor applications.
 
Fluorocarbon Spraying: Fluorocarbon spraying is a high-end coating technique with excellent weather resistance. It effectively resists UV radiation, acid rain, and other environmental pollutants, offering strong color retention, crack resistance, and corrosion resistance. Fluorocarbon spraying is commonly used in high-end applications, such as building facades, and is particularly suitable for perforated sheets exposed to harsh weather conditions. Galvanizing: Galvanizing is suitable for iron perforated sheets and can be done through electro-galvanizing or hot-dip galvanizing. Electro-galvanizing uses an electrochemical process to apply a thin zinc coating, which is less effective for corrosion protection but more cost-effective. Hot-dip galvanizing, on the other hand, involves immersing the perforated sheet in molten zinc, creating a thicker and more durable zinc layer that offers excellent corrosion resistance, especially in humid or acidic environments.
 
Anodizing: Anodizing is mainly used for aluminum perforated sheets. This electrochemical process forms a protective oxide layer on the aluminum surface, enhancing corrosion resistance and increasing wear resistance. Anodized aluminum perforated sheets are also available in various colors and have a metallic sheen, making them a popular choice for decorative applications. Electro-Polishing: Electro-polishing is used for aluminum and stainless steel perforated sheets. This treatment improves the smoothness and brightness of the metal surface by using electrochemical reactions. Electro-polished perforated sheets have a high degree of smoothness, free from burrs, and are highly decorative with excellent anti-pollution properties, making them ideal for high-end decorative applications.