Shot Blasting to Sa 2.5, Then a Full-Size Paint Booth
Key takeaways
- Blasting happens before painting on every unit, to Sa 2.5 cleanliness for coating adhesion.
- Large units that will not fit a hook-type machine go into a full-size blast room served by crane.
- Painting is done in a booth sized for complete buckets and long structures, not just components.
- Exhaust is treated through cyclone scrubbers and activated carbon before discharge.
Two steps most people only look at one of
Buyers photograph paint. What decides how long that paint lasts is what happened before it — mill scale, rust and welding oxide have to come off completely, or the coating lifts at the first chip. We put every weldment through blasting before it reaches the booth, and we finish instead of pretending the surface was ready.
Our set-up covers both size ranges. A hook-type blast machine with multiple throwing wheels handles smaller and medium parts hung in batches, with pulse-jet dust collection attached. A full-size blast room — served by its own crane and floor rails — takes entire buckets and long structures that cannot be hung, including the oversize pieces that a standard machine simply refuses to swallow.
Then painting, on whole units
| Stage | What it does |
|---|---|
| Blasting to Sa 2.5 | Removes mill scale, rust and oxide; gives the coating an anchor profile |
| Dust-off | Removes abrasive residue before coating |
| Primer | Corrosion protection and adhesion layer |
| Topcoat | Finished colour and film build |
The booth itself is a roller-shutter enclosure wide enough for complete buckets, with a rail-mounted trolley for moving work in and out — which means a five-metre structure goes in whole rather than being split into pieces that later have to match.
On the environmental side the spray exhaust is not vented raw. It passes through cyclone scrubber towers that knock down overspray and then through activated carbon adsorption units before discharge. That treatment is part of why the shop can run continuously in the industrial park it sits in, and it is worth knowing if your own compliance team asks about the supply chain.
SHOP FLOOR DATA
| Field | Value |
|---|---|
| Blast standard | Sa 2.5 before coating |
| Blast equipment | Hook-type machine; full-size room with crane |
| Paint booth | Full-size enclosure, rail trolley access |
| Coating system | Primer plus topcoat |
| Exhaust treatment | Cyclone scrubbers + activated carbon adsorption |
FAQ
Can you match our corporate colour? Yes, given a reference. Colour matching is easiest when we have a physical sample or a recognised colour reference rather than a printed picture.
What film build do you achieve? Per the coating system agreed for the order. Tell us your requirement and we will quote to it.
How are painted parts protected for shipping? Contact surfaces are wrapped and machined faces get rust protection before loading.
Related: Standard Wheel Loader Bucket · Contact
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