Surface Cleaning and Derusting

Application: Remove impurities such as rust, scale, welding spatter, and oil stains from the surface of steel structures. It is suitable for the pretreatment of bridges, ships, building steel structures, mechanical components, etc.

Advantages: Compared with traditional sandblasting or manual grinding, it is more efficient and can realize automated continuous processing. The cleaned surface has uniform roughness, which improves the adhesion of subsequent coating or welding.

Surface Strengthening

Application: By impacting the metal surface with high-speed projectiles, compressive stress is generated on the surface layer, improving the fatigue strength and corrosion resistance of the material. It is often used for key stress-bearing components such as crane hooks, gears, and springs.

Principle: Projectile impact leads to the refinement of surface grains, forming a residual compressive stress layer and inhibiting crack propagation.

Pretreatment Before Coating

Functions: The surface after shot blasting forms an "anchor pattern" structure, which significantly increases the adhesion of coatings (such as paint and galvanized layers). It reduces the risk of coating hollowing and peeling, and extends the service life of steel structures.

Standards: The standard GB/T 8923.1-2011 Surface Preparation of Steel Substrates Before Application of Paints and Related Products is often referenced to ensure a cleanliness level of Sa2.5 or higher.

Special Surface Treatment

Texturing treatment: By adjusting the type of projectiles and process parameters, a specific roughness is formed on the surface of steel structures to meet special functional requirements (such as anti-slip plates, friction-type high-strength bolt connection surfaces).

Deburring and finishing: Remove burrs from castings or machined parts to improve surface finish.