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Bristle Blaster surface preparation

Applications · Singapore

Rust removal to a coating-ready standard, without grit

Rust grade C and D steel taken back to a cleanliness comparable to ISO 8501-1 Sa 2½ – Sa 3 with a 65–85 µm profile, on pipe racks, tank roofs, structures and equipment across Singapore, in place and under your permit-to-work.

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The problem on site

Why this is done grit-free in Singapore

In Singapore’s humidity, steel that has lost its coating rusts to grade C or D within months. Wire brushing and needle guns polish the surface to St 2 – St 3 and leave a profile too smooth for a high-build coating; grit blasting reaches Sa 2½ but needs containment, waste disposal and, on a live plant, a shutdown window.

The Bristle Blaster® removes rust and mill scale by cold-working the surface with hardened bristle tips: each tip strikes the steel, removes corrosion product and rebounds, leaving a fresh, angular anchor profile, the same result as an abrasive particle without the abrasive. Flakecoat crews use it for in-service repairs and follow with the correct coating system; maintenance teams buy the tool and belts from our Tuas stock.

For the specification

Typical figures

Sa 2½ – Sa 3Cleanliness comparableISO 8501-1 on rust grade C–D
65–85 µmAnchor profile (Rz)Coating-ready, angular
~1–1.5 m²Per 23 mm beltHeavily corroded steel, ~1 belt-hour
0Grit to removeNo containment, no media waste

How it is done

Method, step by step

Step 1

Assess

Rust grade & access

Rust grade, coating thickness and access decide belt width (23 mm open areas, 11 mm tight access) and tool drive: pneumatic, electric or cordless.

Choose a tool Step 2

Remove

Bristle Blaster® · steel belt

One pass removes rust and mill scale and cuts the profile. Steel belts for carbon steel; stainless belts for stainless and non-ferrous.

Belts Step 3

Verify

Comparator · profile gauge

Check cleanliness against ISO 8501-1 photographs and profile with replica tape or a gauge before the coating goes on.

M-TESTCO® instruments Step 4

Coat

Flakecoat systems

Apply the specified primer, epoxy or glass-flake system within the coating’s recoat window; the prepared surface has no embedded grit or dust.

Coating systems

Tools & consumables

Tools and systems used

All products

Where it applies

Related sectors

All industries
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Bridges, rail & infrastructure — MontiPower®
Infrastructure & steelSector page

Questions

Common questions

Learn more about our heritage and the specialized services we provide.

Does bristle blasting remove rust as well as grit blasting?

On rust grade C–D carbon steel the Bristle Blaster® produces a cleanliness comparable to Sa 2½ – Sa 3 and a 65–85 µm profile. On very large open areas a blast crew is still faster; on smaller areas, edges, welds and live assets the tool avoids the containment and the downtime.

Can it be used on pitted steel?

Yes. The bristle tips reach into pits that a grinding disc bridges over. Deep pits are cleaned, then filled and rebuilt with epoxy repair compounds before coating.

Is the surface clean enough for glass-flake linings?

Yes, provided the profile is verified. Glass-flake systems typically specify 60–100 µm; the tool delivers 65–85 µm on carbon steel with the standard belt.

Send us the scope for a quotation within one business day

Photos, drawings or a site walk are enough to start. SGD pricing, tools and crews from Tuas.

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