Research on key technologies and multi field applications of surface treatment for Copper pressed components
Apr 09, 2026
Overview of surface treatment process for Copper pressed components
The surface treatment process of Copper sheet stamping mainly focuses on improving corrosion resistance, optimizing conductivity, enhancing surface smoothness, and improving coating adhesion. The commonly used processes in industry include electroplating, chemical treatment, and passivation oxidation, each of which is suitable for different product requirements and usage scenarios. Electroplated copper process is the most commonly used surface treatment method, which is divided into two categories: alkaline copper plating and acidic copper plating.
Alkaline copper plating is mainly used for bottom layer treatment, forming a uniform and dense thin copper layer on the surface of the Stamping copper sheet substrate to improve the adhesion of subsequent nickel, chromium, silver, gold and other coatings, and enhance the basic corrosion resistance; Acidic copper plating is used for thickening coatings to meet the needs of copper stamping parts in high conductivity and high wear resistance scenarios, comprehensively optimizing the conductivity and mechanical properties of the parts.
Chemical polishing and cleaning pretreatment
Chemical polishing and cleaning are important pre-treatment processes before surface treatment. Immersing Copper pressed components in a specialized polishing solution can quickly remove residual oil stains, burrs, oxidation spots, and impurities from the stamping process, resulting in a smooth and uniform surface.
This not only improves the appearance of the Electrical copper stamping part, but also lays a good foundation for subsequent passivation, electroplating and other processes. At the same time, this treatment process can slightly improve the surface's resistance to dirt and corrosion, which is a key step in improving the overall quality of copper stamping parts.
Passivation and anodizing treatment process
Passivation and anodizing are key advanced processes for improving the durability of Custom copper stamping, mainly targeting products exposed to humid and corrosive environments for a long time, fundamentally solving the problems of oxidation discoloration and corrosion. Passivation treatment does not require electricity, and a dense inert oxide film is rapidly formed on the surface of copper stamping parts through chemical reactions.
This process is simple to operate, cost-effective, and can effectively block the contact between air, moisture, and substrate, significantly improving the corrosion resistance and wear resistance of parts. It is the mainstream post-treatment process for most ordinary Copper strip stamping. Anodizing uses copper stamping parts as anodes and generates thicker and harder oxide film layers on the surface through electrolytic reactions. Compared with passivation treatment, anodizing has higher corrosion resistance and surface hardness, and the appearance of the film layer can also be adjusted as needed. This process is suitable for copper stamping parts with high requirements for performance and appearance, and can compensate for the defects of soft and easily oxidized surface of pure copper materials.
Process matching and characteristics for different application scenarios
The application scenarios of Copper stamped components cover multiple fields such as mechanical manufacturing, electronic appliances, building decoration, and aerospace. There are significant differences in the requirements for surface performance, appearance, and accuracy in different scenarios, so it is necessary to match the surface treatment process accordingly.
In the field of mechanical manufacturing, Copper stamping processing connections are mainly used for components such as bearings, gear connectors, and wear-resistant gaskets. By relying on the wear resistance and friction reducing properties of copper materials themselves, combined with passivation or thin-layer electroplating treatment, the friction coefficient during mechanical operation can be effectively reduced, wear and noise can be reduced, and the service life of components can be extended.
In the field of electronic appliances, copper stamping parts, as core basic components such as connectors, terminals, circuit board connectors, transformer coils, plug spring plates, etc., require extremely high conductivity. Usually, electroplated copper is used as the bottom layer or subjected to pure passivation treatment to ensure efficient current transmission, prevent poor contact caused by oxidation during long-term use, and ensure the stable operation of electronic and electrical products.
In the field of architectural decoration, Cross copper metal stamping is commonly used for decorative components, curtain wall accessories, metal decorative strips, etc. The core requirements are appearance texture and long-term weather resistance. Chemical polishing and passivation treatment are usually adopted to maintain the metallic luster and unique texture of copper materials, and at the same time, it has excellent weather resistance and anti-aging performance, giving consideration to both decoration and practicality. It is not easy to rust and fade after long-term use.
In the aerospace field, Precision copper stamping parts need to cope with complex environments such as extreme high and low temperatures, strong radiation, and high vacuum, with strict requirements for surface stability, conductivity, and mechanical strength. Usually, anodizing or high-precision electroplating treatment is used to ensure that parts do not fail under extreme working conditions, ensuring the reliability of signal transmission and structural connections.
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