Descaling | Vapormatt

Descaled parts that still carry scale patches are causing your coating line to reject work it should never see.

Wet blasting removes heat scale across the full surface in a single controlled pass. The slurry cushions the abrasive, so the substrate underneath is not damaged while the scale is stripped. Because the process is continuous and repeatable, surface condition going into your next operation is consistent batch to batch, not variable operator to operator.

How wet blasting heat scale removal works in practice

The pressurised slurry drives abrasive particles into scale deposits and lifts them from the substrate surface. Water in the mix flushes removed contamination clear immediately, preventing redeposition and protecting the base material. Pressure and abrasive grade are dialled to the component material and geometry, giving you a repeatable surface condition rather than a variable one.

Typical setup: heat scale removal

Abrasive: Coarse aluminium oxide
Pressure: 4-5 bar (58-73 psi)
Guns: Automatic; cable processed in a Profelis continuous-feed configuration
Minimum recommended control: Abrasive condition monitoring required for continuous processing
Variables: Recipe does not change significantly across materials. Throughput is the primary variable: process as aggressively as the substrate tolerates, then increase speed to the fastest rate that maintains the required outcome

How Vapormatt controls the wet blasting process

Heat scale removal capability: what wet blasting achieves

Parameters below are indicative and confirmed for the component types listed. The process handles a wide range of part sizes and production volumes within these boundaries.

Component type	Typical size or weight	Process mode	Achievable outcome	Minimum control
Steel wire (spring wire reel)	Ø2.4mm	Automatic	Scale removed, surface prepared for bonding	Abrasive condition monitoring
Oil and gas pipe couplings	Up to Ø500mm	Automatic	1.6-3.2µm Ra, surface prepared for phosphating	Automatic motion, abrasive condition monitoring
Cast alloy aerospace turbine blade	40mm x 25mm approx.	Automatic	Scale removed, 2.2µm Ra	Basic manual machine minimum

In Vapormatt sample processing trials, a 32kg reel of 2.4mm steel spring wire was processed on the R&D Wire Lynx to remove scale and prepare the surface for bonding. The full reel was processed to a confirmed recipe and inspected under USB microscope at 90x magnification. Scale was fully removed across the reel length, with surface condition confirmed clean and prepared for the customer's downstream bonding process.

Vapormatt Profelis automatic wet blasting machine

The right machine for your heat scale removal application

Profelis: continuous product such as wire and cable at high throughput volumes.

Cougar+: medium-sized components such as pipe couplings at medium production volumes.

Puma+: smaller components at lower production volumes where a compact footprint is required.

Contact us

Find out if wet blasting heat scale removal is right for your components

Talk to a Vapormatt process engineer

Related machines

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Cougar+ automatic wet blasting machine

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Manual machines

Puma manual wet blasting machine

For production teams finishing medium-sized components every day. Engineered with operator comfort in mind, this machine has every feature as standard. More details

Automatic machines

Puma+ automatic wet blasting machine

Compact with four configurations, suited to smaller component runs, solid tools, and factories that need consistent automated processing. More details

FAQs

Will wet blasting remove scale without damaging the base material underneath?

Yes. The water in the slurry cushions the abrasive at the point of impact. You can set pressure and abrasive grade to remove the scale layer without cutting into the substrate. For steel wire at 2.4mm diameter, the process removes surface scale and encrustations while leaving the wire geometry intact.

Our current process leaves patchy results on complex shapes. Can wet blasting handle those?

Wet blasting reaches recessed areas that line-of-sight processes miss. The slurry flows around geometry, and automatic gun configurations can be set to ensure consistent coverage. On threaded pipe couplings up to 500mm diameter, trials achieved 1.6-3.2µm Ra consistently across the thread form, not just the flat faces.

How do we verify that scale has actually been removed to the standard we need?

Surface roughness measurement with a stylus Ra instrument is the standard verification method for components with a defined Ra target. Visual and microscope inspection confirms scale removal for components where Ra is not the specified output. Both methods were used in Vapormatt sample processing trials referenced on this page.

How is abrasive condition managed on a continuous production line?

For continuous product such as wire processed on a Profelis, abrasive condition monitoring is the minimum recommended control level. Without it, abrasive breakdown over a long run produces inconsistent surface condition, visible as variation in colour and texture along the product length. Automated abrasive conditioning maintains consistency across the full production run.

What does a trial process look like before we commit to a machine?

Vapormatt's sample processing facility handles incoming parts and returns them with a full test report including recipe, measurements, and photographs. You get confirmed results on your own components before any capital decision.

Heat scale removal: clean surfaces, consistent downstream results