Shot blasting is a key stage in preparing steel structures for painting. EMT equipment ensures cleaning to Sa 2.5 grade according to ISO 8501-1.
Steel structures are widely used in bridges, buildings, petrochemicals, shipbuilding, and other fields. Their corrosion protection treatment is crucial for ensuring structural safety and extending service life. Shot blasting, as the most effective surface pre-treatment technology, has been recommended by major international standards (ISO 8501-1, SSPC-SP10, etc.) as the preferred process before steel structure coating.
EMT shot blasting equipment uses high-speed rotating impellers to accelerate steel shot to speeds of 70-80 m/s, uniformly projecting them onto steel surfaces. The impact force of high-speed steel shot thoroughly removes rust, mill scale, welding slag, and old coatings, revealing the original metallic luster of the base material. The treated surface cleanliness can achieve Sa 2.5 grade (near-white grade) according to ISO 8501-1, which is the minimum surface preparation standard required by most high-performance coating systems.
Surface roughness is equally important. By selecting different combinations of steel shot sizes and hardness, EMT can precisely control the post-treatment surface roughness within the Rz 40-80μm range, providing optimal mechanical interlocking for coatings. Research shows that proper surface roughness can improve coating adhesion by over 50%.
EMT offers various models of shot blasting equipment: roller conveyor type for continuous processing of H-beams, steel plates, and standard profiles; hook type for large welded structures and box beams; tumble type for batch processing of castings and small parts. All equipment is fitted with efficient dust collection systems to ensure clean working environments and protect operator health.
EMT shot blasting equipment uses high-speed rotating impellers to accelerate steel shot to speeds of 70-80 m/s, uniformly projecting them onto steel surfaces. The impact force of high-speed steel shot thoroughly removes rust, mill scale, welding slag, and old coatings, revealing the original metallic luster of the base material. The treated surface cleanliness can achieve Sa 2.5 grade (near-white grade) according to ISO 8501-1, which is the minimum surface preparation standard required by most high-performance coating systems.
Surface roughness is equally important. By selecting different combinations of steel shot sizes and hardness, EMT can precisely control the post-treatment surface roughness within the Rz 40-80μm range, providing optimal mechanical interlocking for coatings. Research shows that proper surface roughness can improve coating adhesion by over 50%.
EMT offers various models of shot blasting equipment: roller conveyor type for continuous processing of H-beams, steel plates, and standard profiles; hook type for large welded structures and box beams; tumble type for batch processing of castings and small parts. All equipment is fitted with efficient dust collection systems to ensure clean working environments and protect operator health.