Surface treatment techniques for rivet nuts include the following:

Based on the intended use of the surface coating (film layer), surface treatment technologies can be categorized into four main types: surface strengthening, surface modification, surface decoration, and surface functionalization.

(1) Surface strengthening can be further categorized into heat treatment, mechanical, metallurgical, coating, and thin film strengthening, with a focus on enhancing the surface hardness, strength, and corrosion resistance of materials.

(2) Surface modification primarily includes physical modification, chemical modification, and beam modification (laser, electron beam, and ion beam), with a focus on improving the surface morphology of materials and enhancing their surface corrosion resistance.

(3) Performance decoration encompasses various coatings and finishing techniques, focusing on enhancing the visual effects of materials while providing them with adequate weather resistance.

(Surface functionalization refers to the addition of physical and chemical properties to the surface layer beyond the aforementioned characteristics, such as electrical, magnetic, optical, sensitive, separation, and catalytic properties.)

Surface treatment technologies are categorized based on the materials used, including atomic deposition, particle deposition, overall coating, and surface modification.

Surface treatment technologies can be categorized into metal (alloy) coatings, polymer coatings, and composite coatings based on the material type of the surface to be treated. Specific surface treatment methods include thermal spraying, chemical vapor deposition, laser surface treatment, ion implantation, and hot dipping, among others.