In brief
Abrasive blasting to Sa 2.5 (bare metal) is the first and most important stage of silo and cement trailer paint renovation — without it, the new coating does not adhere to the substrate and sub-surface corrosion continues. PHS Magnum has a blast chamber capable of processing full-size silo trailers. Blasting is carried out both as a renovation stage and as preparation for TDT pressure vessel inspection.
Abrasive blasting is not just preparation for painting. It is a vessel condition assessment that reveals hidden corrosion, weld cracks, and areas requiring repair — before a new coating is applied or the vessel goes to the TDT inspector.
Cleanliness grades — explanation
| Grade | Description | Application |
|---|---|---|
| Sa 1 | Light blast cleaning — visible rust and scale | Temporary preservation |
| Sa 2 | Thorough blast cleaning — most rust and old coating removed | Lighter coating systems |
| Sa 2.5 | Very thorough — 95% bare metal | Standard for trailer renovation |
| Sa 3 | Blast cleaned to visually clean steel — 100% cleanliness | Special industrial applications |
For silo trailer paint renovation we apply Sa 2.5 — this is the industry standard and required by epoxy + PUR 2K coating systems.
What blasting at PHS Magnum covers
Standard scope:
- Vessel — all side walls, bottom, end caps
- Frame chassis — particularly lower sections exposed to salt
- Axle and suspension shields
- Access ladder and walkway
Internal vessel blasting: On request or for internal TDT inspection. Open access hatches, blast interior — remove residual corrosion, old coatings, dust. Internal epoxy applied after blasting.
Renovation process — from blasting to finished paint
- Vehicle intake — condition inspection, corrosion assessment, documentation photos
- Disassembly — remove non-blasted components (lighting, wiring)
- Blasting — to Sa 2.5, roughness profile Rz 40–70 µm
- Inspection and repairs — welds, voids, defects corrected (within 2 hours)
- Epoxy primer — applied immediately after blasting (max. 4 h delay)
- Curing and sanding — 24–48 h
- PUR 2K topcoat — two layers, curing
- Logos and markings — applied or painted to specification
- Vehicle return — 5–10 working days from intake
Ask for a quote and availability: +48 602 716 551 | biuro@magnumchorula.pl
Related: Paint renovation · Zinc coating · TDT vessel inspection · Spitzer service · Feldbinder service