Surface Preparation Before Painting

1. When Surface Preparation Before Painting is Required

• Remove rust, mill scale, oxide layers, welding spatter and slag

• Clear dust, oil stains, dirt and residual sand from casting or machining

• Strip old paint layers and surface burrs

• Generate controlled uniform roughness to enhance paint bonding performance

• Comply with international standards including Sa2.0, Sa2.5 and Sa3.0 for painting requirements

• Eliminate residual stress to prevent paint peeling and surface cracking in service

2. Industries We Serve for Surface Preparation Before Painting

• Steel Structure Industry: H-beams, I-beams, steel columns, steel towers and building frameworks

• Automotive Manufacturing: Vehicle frames, chassis parts, body components and auto accessories

• Shipbuilding & Offshore Engineering: Hull structures, deck parts, marine equipment and offshore platforms

• Construction Machinery: Excavators, loaders, cranes and related structural assemblies

• Pressure Vessel & Pipeline Industry: Steel pipes, pipe fittings, storage tanks and pressure containers

• Container Industry: Standard shipping containers and modular housing units

• General Machinery: Equipment housings, bases and mechanical components

• Metal Furniture & Hardware: Metal frames, decorative hardware and outdoor metal products

3. Common Workpieces & Matching Shot Blasting Machines

1. Steel Plates & Structural Profiles

Workpiece features: Large-sized regular parts, suitable for continuous mass processing

Matching equipment: Roller Conveyor Shot Blasting Machine

Achieves full-surface cleaning and texturing during continuous conveying, high efficiency for mass production of steel plates and section steel.

2. Welded Structures & Large Assemblies

Workpiece features: Irregular shapes, numerous corners and inner cavities, heavy weight

Matching equipment: Hanger Type Shot Blasting Machine

Workpieces are suspended and rotated to ensure thorough treatment of hidden areas, ideal for large welded frames and engineering assemblies.

3. Medium & Small Castings & Machined Parts

Workpiece features: Small volume, large batches, with residual sand and minor burrs

Matching equipment: Belt Type Shot Blasting Machine

Gentle tumbling avoids part damage, delivering consistent pre-treatment for various small mechanical parts.

4. Thin-walled Stamped Parts

Workpiece features: Thin material, lightweight, prone to deformation under strong impact

Matching equipment: Barrel Blast Shot Blasting Machine

Low-speed soft blasting removes contaminants without distortion, perfect for thin metal stampings.

5. Disc-shaped & Rotational Components

Workpiece features: Axisymmetric structure, requiring uniform surface treatment all around

Matching equipment: Rotary Table Shot Blasting Machine

Stable rotating platform ensures even cleaning and roughening, applicable to flanges, wheel parts and circular