The difference between shot peening and sandblasting in Dalian metal surface treatment:

The difference between shot peening and sandblasting in Dalian metal surface treatment:

Sandblasting and shot peening both use high-pressure air or compressed air as power to blow out the sprayed material and impact the surface of the workpiece to achieve cleaning effect. But the chosen medium is different, sandblasting medium has a cutting effect on the surface; After sandblasting treatment, the dirt on the surface of the workpiece is removed, and the surface of the workpiece is slightly damaged, resulting in a significant increase in surface area, thereby increasing the bonding strength with the workpiece and coating/coating.

The use of metal surface treatment equipment for shot blasting cleaning of workpieces can bring the following benefits: improving product appearance and internal quality, and bringing new business opportunities to manufacturers; After shot blasting, the workpiece can obtain a certain roughness, uniform and consistent clean metal surface, improving the corrosion resistance of mechanical products and metal materials; Clearing the internal stress of structural components during welding, improving their fatigue strength, and achieving long-term service life; Increase the adhesion of the paint film, improve the decorative quality and anti-corrosion effect of the workpiece; The metal surface treatment equipment has achieved PLC automatic cleaning mode, greatly improving efficiency, reducing the labor intensity of cleaning work, and improving the production efficiency of the enterprise.

The difference between shot peening and sandblasting in Dalian metal surface treatment

Shot peening and sandblasting both use high-pressure air or compressed air as power to blow it out at high speed and impact the surface of the workpiece to achieve cleaning effects, but the effect varies depending on the medium chosen.

After sandblasting treatment, the dirt on the surface of the workpiece is removed, and the surface of the workpiece is slightly damaged, resulting in a significant increase in surface area, thereby increasing the bonding strength between the workpiece and the coating/coating.

The surface of the workpiece after sandblasting treatment is metallic in its natural color, but due to its rough surface, light is refracted away, resulting in no metallic luster and a dull surface.

After shot peening treatment, the dirt on the surface of the workpiece is removed, and the surface of the workpiece is minimally damaged, resulting in an increase in surface area. Due to the fact that the surface of the workpiece is not damaged during the processing, the excess energy generated during processing will lead to surface strengthening of the workpiece substrate.

The surface of the workpiece that has undergone shot peening treatment is also of metallic natural color, but due to the spherical surface, some of the light is refracted, so the workpiece is processed in a matte effect.

Shot blasting and sandblasting are commonly used in the repair and shipbuilding industries. However, both shot blasting and sandblasting use compressed air. Of course, it is not necessary to use a high-speed rotating impeller for shot blasting. In the repair and shipbuilding industry, shot blasting (small steel shot) is commonly used for steel plate pretreatment (rust removal before painting); Sandblasting (using mineral sand for repair and shipbuilding) is often used in formed ships or sections to remove old paint and rust from steel plates and repaint them. In the repair and shipbuilding industry, the main function of shot blasting and sandblasting is to increase the adhesion of steel plate coating paint.

Surface treatment using shot peening has a strong impact force, significant cleaning effect, and high power consumption. Generally, shot peening is used to eliminate the oxide skin, rust, molding sand, and old paint film on medium and large metal products with a thickness of no less than 2-6mm or without requiring accurate dimensions and contours. It is a cleaning method before surface coating (plating).