Analysis and application research of chemical polishing process for Precision copper stamped parts

Precision copper stamped parts have a wide range of applications in electronic components, power equipment, and decorative products due to their excellent conductivity and ductility. Copper chemical polishing, as a key post-treatment process to improve the surface quality of copper, effectively compensates for the surface defects of stamping forming technology. The surface of copper parts after stamping processing is prone to residual oil and oxides, and chemical polishing technology can effectively solve this problem, significantly improving the surface glossiness of Stamping copper sheets and optimizing their overall surface performance. This process not only removes micro burrs and oxide layers, but also achieves multiple effects such as degreasing and mirror polishing, providing a reliable surface foundation for subsequent assembly and use.

In the field of precision electronics, chemical polishing plays a decisive role in the machining quality of Precision copper stamped parts. Taking micro connectors as an example, after chemical polishing treatment, the micro burrs generated during the stamping process are effectively removed, surface oxides are removed, and surface roughness is significantly reduced. Practical applications have shown that the contact resistance of polished Type-C interfaces and other components can be reduced by about 38%, and the leaching amount of copper ions can be controlled below 0.08 ppm, fully meeting the requirements of high conductivity and high cleanliness.

In the power and cooling system, using chemically polished power copper bars and cooling modules can increase their thermal conductivity by about 12%. For example, the cooling efficiency of 5G base station radiators can be increased by 25%, effectively ensuring the stable operation of power equipment and communication base stations.

In the field of decoration and industrial products, Custom copper stamping that has undergone chemical polishing can significantly enhance the mirror effect and greatly improve the appearance aesthetics of products. At the same time, combined with chromium free passivation technology for post-treatment, its salt spray resistance can reach 96 hours. This process combination achieves a good balance between decoration and practicality, meeting high-end appearance requirements while ensuring the reliability of Copper strip stamping in complex environments.
 

The chemical polishing of Electrical copper stamping parts must follow a standardized process flow. The first step is pre-treatment, including degreasing, acid washing, and rinsing. The core goal is to ensure that the surface of copper components is free of oil stains and oxide layers, providing a clean substrate for subsequent polishing. After the preprocessing is completed, it enters the chemical polishing stage. The workpiece needs to be immersed in a polishing solution preheated to 45-50 ℃ for 1-4 minutes, which is suitable for the polishing needs of copper materials. During this process, a brown oxide film will form on the surface of the Metal stamping parts electric copper. Subsequently, the workpiece is subjected to film removal treatment, usually soaking it in a 5-8% sulfuric acid solution or specialized film removal solution for 8-15 seconds. After the oxide film is completely removed, it is thoroughly rinsed to complete the core polishing process.

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