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07
2023
-
06
Surface treatment method after die-casting aluminum processing
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After the die-cast aluminum parts are processed, different surface treatment methods can be taken to improve the appearance, corrosion resistance and wear resistance. Here are a few common die-cast aluminum surface treatment methods:
Anodizing (anodizing): Anodizing is a commonly used surface treatment method to improve the corrosion resistance and hardness of aluminum parts by forming an oxide film on their surface. The oxide film can be colored to achieve different appearance effects. The anodizing treatment also enhances the adhesion of the coating.
Spray coating: Different types of coatings, such as lacquer, powder coating or special coating, can be applied on the surface of die-cast aluminum parts. These coatings can provide cosmetic finishes while providing additional corrosion and abrasion resistance.
Electroplating: Electroplating is the process of improving appearance and corrosion resistance by covering the surface of die-cast aluminum parts with a layer of metal or alloy. Common electroplating methods include chrome plating, nickel plating, zinc plating, etc. Plating can also provide enhanced electrical conductivity and wear resistance.
Polishing and sanding: The surface finish and gloss of die-cast aluminum parts can be improved by polishing and sanding. This method can be used to improve the appearance quality without the need for additional coating or coating.
Sandblasting: Sandblasting is the removal of surface defects, oxides and dirt by spraying high-speed particles or sand particles to create friction on the surface of die-cast aluminum. This method results in a rough surface effect and provides better adhesion for subsequent coatings or coatings.
Chemical treatment: Chemical treatment includes methods such as pickling and alkaline washing, which can clean the surface of die-cast aluminum and remove oxides and dirt. This method is often used for pre-treatment to provide better adhesion to subsequent coatings or coatings.
When selecting the appropriate surface treatment method, the specific requirements of die-cast aluminum parts need to be taken into account, such as corrosion resistance, wear resistance, appearance requirements, as well as cost and environmental factors. The best surface treatment may need to be evaluated and selected on a case-by-case basis.
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