The surface treatment of connector shrapnel involves artificially forming a layer on the surface of the product material that has different mechanical, physical, and chemical properties from the substrate. The purpose of surface treatment is to meet the demands for corrosion resistance, wear resistance, decoration, or other functional requirements of the workpiece.

The treatment methods for connector shrapnel include pre-treatment before coating, which is necessary to remove various foreign substances (such as oil, rust, dust, old paint films, etc.) attached to the surface of the shrapnel, providing a suitable base for coating requirements to ensure good corrosion resistance, decorative properties, and certain functional characteristics. Therefore, the surface of the shrapnel must be pre-treated before coating.

The surface treatment of metal shrapnel is mainly to enhance the characteristics of the product and prolong its service life.