In the process of mechanical production and processing, a variety of surface treatment processes can meet our performance requirements for mechanical parts and products, so what are the different methods of surface treatment?

Common surface treatment processes are: spraying, painting, electroplating, anodizing, impregnation, oil injection, sand blasting.

Spraying: The use of pressure or electrostatic force to attach paint or powder to the surface of the workpiece, so that the workpiece has anti-corrosion and appearance decoration.

Baking paint: On the substrate on the primer, top paint, each paint, are sent to the dust-free temperature oven, baking.

Electroplating: The process of using electrolysis to attach a metal film to the surface of a metal or other material. It can prevent corrosion, improve wear resistance, electrical conductivity, reflectance and improve beauty and so on

Anodizing: electrochemical oxidation of metals or alloys. The metal or alloy is used as the anode, and the oxide film is formed on its surface by electrolysis. The metal oxide film changes the surface state and performance, such as surface coloring, improving corrosion resistance, enhancing wear resistance and hardness, protecting the metal surface.

Infiltration: is a microporous (slit) infiltration sealing process. The sealing medium (usually a low-viscosity liquid) is infiltrated into the microhole (fine slit) through natural penetration (i.e. microhole self-imbibition), vacuuming and pressurizing, and the gap is filled, and then the sealing medium in the gap is solidified by natural (room temperature), cooling or heating and other methods to achieve the role of sealing the gap.

Spray oil: the paint is sprayed on the surface of the product and the way of natural air drying.

Sandblast: Is the use of compressed air as the power to form a high-speed jet beam spray material (copper ore, quartz sand, emery, iron sand, sea sand) high-speed spray to the surface of the workpiece to be treated, so that the surface of the workpiece surface appearance or shape changes, due to the impact of abrasive on the surface of the workpiece and cutting action, so that the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, The mechanical properties of the workpiece surface are improved, so the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating is extended, and the flow and decoration of the coating are also beneficial.

Surface treatment before the project

Polishing: The use of flexible polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece. Polishing can not improve the dimensional accuracy or geometric accuracy of the workpiece, but for the purpose of obtaining a smooth surface or mirror gloss, and sometimes to eliminate gloss (extinction). Usually a polishing wheel is used as a polishing tool. The polishing wheel is generally made of multiple layers of canvas, felt or leather, and is clamped on both sides with a metal round plate. The rim is coated with a polishing agent composed of a uniform mixture of micro-powder abrasive and grease. When polishing, the high-speed rotating polishing wheel (the circular speed is above 20 m/s) presses the workpiece, so that the abrasive produces rolling and micro-cutting on the surface of the workpiece, so as to obtain a bright machining surface, the surface roughness can generally reach Ra0.63 ~ 0.01 microns; When a non-greasy matting polish is used, the bright surface can be matted to improve the appearance. When the product surface requirements are slightly lower, the method of roller polishing is often used. A large number of abrasives and products are placed in a can-shaped drum during rough casting. When the drum rotates, the products and abrasives roll and collide randomly in the cylinder to achieve the purpose of removing the surface convex and reducing the surface roughness.

Shot blasting: The use of shot blasting machine, centrifugal force ejection, high-speed projection on the surface of the workpiece, especially the dead Angle of the workpiece cavity shot blasting cleaning, so as to achieve the required brightness, cleanliness, roughness and strengthen the purpose of the workpiece surface, greatly improve the service life and beauty of the parts.

Ultrasonic cleaning is the use of ultrasonic cavitation in the liquid, acceleration and direct flow effect on the liquid and dirt, so that the dirt layer is dispersed, emulsified, stripped to achieve the purpose of cleaning.