Wire and cable cleaning and finishing by wet blasting

Wet blasting is used to clean, descale and finish continuous wire, cable and strip in-line, at production speed. It removes oxides, heat scale, drawing lubricants and graphite, and can apply a controlled finish in the same pass.

Examples include a satin finish on memory wire, a non-specular finish on overhead power conductor, or a reactive surface for bonding and encapsulation. Integrated rinsing and drying mean the product leaves the machine clean, dry and ready for the next production stage, with no off-line handling.

Yes. Wet blasting, vapor blasting, vapour blasting and slurry blasting all describe the same process: a fine abrasive suspended in water is blasted onto the surface. The water cushions the abrasive, so it cleans without embedding media or damaging the wire, and it suppresses the dust created by dry blasting. Vapormatt is the originator of the wet blasting machine and makes the Profelis, the in-line wet blasting machine for wire and cable.

Wet blasting is used on a wide range of continuous products:

• Aluminium and copper feeder wire and rod for continuous rotary extrusion
• Nitinol and other shape memory wire
• Overhead power conductor, including AAC, AAAC, ACSR, ACSR/TW and HTLS outer strands
• Carbon, tool and spring steel wire
• Stainless steel cable
• Submarine communications cable
• Carding wire
• Fine high-tech wire such as tungsten
• Bandsaw blade strip

It has also been demonstrated on carbon fibre feedstock rod.

The Vapormatt Profelis processes wire and cable from 1mm to 54mm (0.04" to 2.13") in diameter. The optional dual-line configuration runs two products at once from 1mm to 38mm (0.04" to 1.50"). Vapormatt's patented micro nozzle configuration handles fine wire down to 1mm, including multiple strands at the same time.

Yes. The Profelis is fully enclosed and self-contained, and it fits into existing drawing, stranding, extrusion and reeling lines without redesigning them. It can be configured to run left to right or right to left to suit your floor layout, with a wire entry height of 950mm to 1,050mm (38" to 41"). Rinsing and an automatic air wipe are standard, and an optional cable vacuum drying unit is available. Because cleaning happens in-line, the wire has no off-line step where it could re-oxidise or pick up contamination.

The Profelis processes wire and cable at up to 120 m/min (394 ft/min). The actual speed depends on diameter, material, the finish required and the number of blast guns. Larger diameters typically run slower to make sure the full 360-degree surface is covered. In continuous rotary extrusion, wet-blasted feedstock supports stable line speeds of up to 30 m/min (100 ft/min) with fewer unplanned stoppages.

Yes, in two ways:

• Micro nozzle configuration: Vapormatt's patented micro nozzles blast multiple strands at once from a common slurry feed, which lowers running costs.
• Dual-line configuration: two four-gun manifolds process two lines of wire from 1mm to 38mm, sharing a common slurry supply. This suits higher-throughput operations such as dual-line Conform™ extrusion.

Wet blasting removes surface oxides, including black oxide on Nitinol, as well as:

• heat-treatment scale
• drawing lubricants and drawing soaps
• graphite
• residual oils and grease
• surface encrustation

Water flushes removed material away as it is lifted, preventing redeposition. An integrated rinse then removes all blast media before the product is dried.

Wet blasting can produce:

• a uniform satin finish with controlled surface roughness (Ra)
• a non-specular (de-glared) finish meeting ASTM B979 for overhead conductor
• a reactive micro-texture that improves bonding, coating, encapsulation and cladding adhesion
• controlled removal of substrate to achieve a consistent wire diameter

Each finish is set as a named recipe of blast pressure, media and line speed. The recipe is stored on the machine's control panel and can be recalled at the touch of a button.

The finish is consistent from the start of the reel to the end. Process recipes are stored and recalled, Vapormatt's patented flow control keeps blast gun output steady, and abrasive condition monitoring keeps the slurry performing over long runs. Coverage is a full 360 degrees: four guns at 90-degree intervals as standard, or eight at 45-degree intervals for maximum uniformity. Mechanical brushing is different: brushes wear progressively, so the finish drifts during a run.

Yes. In a Vapormatt sample processing trial, a 32kg reel of 2.4mm steel spring wire was processed to a confirmed recipe. Scale was fully removed along the whole reel, which was confirmed under 90x magnification, and the surface was prepared for the customer's bonding process. A typical heat scale setup uses coarse aluminium oxide at 4 to 5 bar (58 to 73 psi). Wet blasting also removes graphite and drawing soap from tool steel wire.

Wet blasting cleans the cable and leaves a reactive surface that plastic encapsulation and outer layers bond to reliably. Poor adhesion can cause delamination, moisture ingress and costly failure in service. A typical application is submarine communications cable, where the Profelis prepares the surface for outer layer bonding. The machine's ventilated cabinet prevents recontamination after processing, and an optional vacuum drying unit makes sure the cable is fully dry before the next stage.

Wet blasting gives overhead conductor a uniform non-specular finish. This raises surface emissivity from about 0.5 to about 0.8, so the conductor radiates more heat and runs cooler at the same load. The result is around 5% more current-carrying capacity (ampacity) with no extra conductor material. The finish meets ASTM B979, which is required for conductor supplied for use on US Federal land.

Yes. Wet blasting cleans both copper and aluminium feedstock ahead of continuous rotary extrusion:

• Copper: busbar, flat and rectangular conductor for transformers and switchgear, magnet and winding wire, and copper profiles.
• Aluminium: solid conductor, busbar, refrigeration tube, sheathing for high-voltage cable, and profiles.

It lets operators run lower-grade or outdoor-stored feedstock without compromising extrusion quality.

Wet blasting is the only one of these processes that cleans in-line, without chemicals or dust, while holding a consistent finish.

• Acid pickling removes oxide but is usually off-line. It leaves chemical residues, cannot hold a specified Ra value, and allows re-oxidation before the next process.
• Dry blasting creates airborne dust and static around fine wire, and dust can settle back onto finished product.
• Mechanical brushing drifts as brushes wear, leaves directional scratches and generates metallic fines.
• Electropolishing is a batch process.
• Ultrasonic cleaning only suits lightly contaminated wire.

Learn more about wet blasting vs other surface finishing processes

No. Wet blasting uses no acid baths, no hydrofluoric acid and creates no acid waste stream. Suspending the abrasive in water suppresses dust where it is generated. The Profelis is fully enclosed, with forced extraction keeping it under negative pressure. Blast media and rinse water recirculate in a closed loop, and the separated solids are disposed of in line with local regulations. On overhead conductor lines, the Profelis uses around 20% less compressed air than equivalent dry blast systems.

The Vapormatt Profelis is the only purpose-built in-line wet blasting machine for continuous wire, cable and strip.

• Build: a stainless steel cabinet with an automated door, four Mk3 blast guns as standard, and integrated rinse and dry.
• Options: eight-gun, dual-line, micro nozzle and bandsaw blade configurations.

Every machine is validated against its agreed specification before it leaves Vapormatt, backed by the Vapormatt Promise.

Vapormatt has supplied in-line wet blasting to more than 50 continuous rotary extrusion installations worldwide. It has also equipped overhead conductor manufacturers across North America and Europe since its first overhead cable machine was installed in 2010. Wire and cable customers include Condumex, TFKable and Holton Crest. BWE uses wet blasting to clean aluminium and copper feedstock and reports that it enhances performance.

Yes. Send samples of your wire or cable to Vapormatt's sample processing facility. They are processed to a recipe developed for your product and returned with a full test report covering the recipe, measurements and photographs. You see confirmed results on your own material before making any investment decision.

Contact us to organise sample processing

Yes. Vapormatt supplies wire and cable manufacturers worldwide, including conductor producers across North America and Europe. Its global partner network provides local sales, support and service. Across all industries, Vapormatt has installed more than 2,000 wet blasting machines in over 50 countries.