Abrasive
Blasting
Accelerated abrasive media impacts the part surface, removing burrs, scale, rust and contamination. Simultaneously prepares the surface for coating or bonding operations.
How Abrasive
Blasting Works
Abrasive media (steel shot, aluminium oxide, glass bead, walnut shell) is accelerated by compressed air or centrifugal wheel and directed at the part surface.
Part preparation
Parts are fixtured or placed in the blast cabinet / tumblast machine. Sensitive surfaces are masked if required.
Blasting
Media impacts the surface at controlled velocity and angle. Burrs, scale and contamination are mechanically dislodged.
Dust extraction & recovery
Spent media and debris are extracted and separated. Media is recycled; fine dust is filtered out.
Where Abrasive Blasting
Is Used
Abrasive blasting is a versatile pre-treatment standard across foundry, fabrication and machining industries.
Foundry castings
Sand castings and investment castings are descaled, deburred and surface-conditioned after shakeout.
Weldments
Welding spatter, scale and burrs are removed to prepare surfaces for painting or NDT inspection.
Machined steel parts
External burrs and sharp edges are removed while achieving a controlled surface roughness for coating adhesion.
Aluminium die-castings
Parting-line flash and surface inclusions are removed on HPDC aluminium before anodising or painting.
Why Abrasive Blasting
- Removes burrs and prepares surface in one step
- Wide range of media for different finishes (shot peening, satin, matt)
- Suitable for large and complex parts
- Automated tumblast or hanger systems for high throughput
- Consistent, uniform surface texture
- No chemicals required (dry process options)
- Standard pre-treatment for painting, plating and thermal spray
- Improves fatigue life via compressive residual stresses (shot peening)
Abrasive Blasting vs. Alternative Methods
| Feature | Blasting | Vibratory | Chemical |
|---|---|---|---|
| Surface preparation | ✔ Excellent | ✔ Good | ✔ Good |
| Internal burrs | ✖ External only | ✖ External only | ✔ All surfaces |
| Large parts | ✔ Yes | ~ Size-limited | ~ Tank size-limited |
| Investment cost | Low–Medium | Low | Low–Medium |
Frequently Asked Questions
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