Engineered Surfaces for Exceptional Performance
Engineered Surfaces for Exceptional Performance

Rollers in the printing/paper industry are subject to the most diverse of operating environments including wear, chemical attack from dyes, thermal stress on heated rollers and mechanical stress from doctor blades. At the same time, they must exhibit a high surface finish over as long a length of time as possible (e.g. Yankee dryer rolls, corrugated rolls, pressure rolls).

The images below show a paper production plant (image 1), a traction coating on winder rolls for paper gripping/feeding (image 2), and the arc spraying coating of a print roll. 


Reclamation of Ball Bearing Seats on Rubber Coated Print Rollers

Reason for use: Repair worn bearing seat without re-coating the print roller with new rubber.

The printing, paper and packaging industries use a wide range of rubber coated steel rollers for applying ink adhesive or the transportation of paper. During use, the bearings at each end of the rubber coated rollers will become impregnated with ink, adhesive or other types of debris causing them to seize, inducing the roller shaft to rotate in the inner race destroying its fit and allowing the roller to become unstable or overheat.
 
By using the Metallisation Flame or Arc spray Process, it is possible to apply a thin coating of molybdenum (Mo) onto the bearing seat bringing it back up to size at a small percentage of the replacement cost and enabling the rubber coating to remain intact.

Equipment: In this case Flame Spray Equipment was used.

Materials: Molybdenum Wire - Exhibits excellent adhesion to ferrous substrates. The spraying of molybdenum using the Metallisation Flame Spray Equipment gives the unique ability to produce a range of coatings between 250 and 800 HV.

METHOD

Cleaning
  1. Remove bearings from roller ends.
  2. Degrease by solvent vapour process if equipment available.
  3. Inspect for cracking and longitudinal distortion.

Pre-Machining

  1. Rough turn or grind diameter being sprayed to a depth of 0.25mm (0.010″) giving a parallel work surface

    Note: On this type of application, Molybdenum will only require a minimum thickness coating as it has excellent adhesion to ferrous substrates when applied by the Flame spray process and the ability to be ground to a feather edge.

Cleaning
  1. Degrease by solvent vapour process if equipment available.

Preparation

  1. Mask all machined surfaces adjacent to area requiring treatment with heavy duty masking tape.
  2. Thoroughly inspect for contamination prior to blasting.
  3. Thoroughly blast with clean no. 30-36 grade aluminium oxide grit.
  4. Ensure that area to be treated is thoroughly blasted.

APPLICATION OF SPRAYED COATING

Masking

  1. Apply No Bond masking fluid, using a small paint brush to all areas adjacent to the area being sprayed (small amounts of masking fluid on areas to be sprayed can be removed with emery cloth).
  2. Check thoroughly area to be sprayed for contamination.
  3. IMPORTANT: Area to be sprayed should not come into contact with chains, rope slings, hands or any other form of contamination. Delays between blasting and spraying should not exceed 20 minutes.

Spraying

Spraying should be as soon as possible after preparation and before any visible sign of deterioration occurs.

The roller should be mounted in a lathe chuck and rotated at a surface speed of not less than 18 metres/minute (60ft per minute).

Note: If rubber cover is in good condition and to be left intact during the spraying operation, it is essential that roller temperature is kept as low as possible during spraying and should not exceed 85°C. 

Bonding

A deposit of Molybdenum Wire is applied to a deposit thickness of 75μm-100μm (0.003”-0.004”) at a range of 75mm (3”). The spray-stream should be at 90° to the surface being coated and traversed by hand to give an even coating.

Main Deposit

Continue to spray the main deposit of Molybdenum using the same parameters as the bond coat but increase spray range to 100mm-150mm (4”- 6”). Complete the spraying of the main deposit traversing the spray head to give a uniform coating over the bearing seat.

Using pre-set callipers, check final deposit thickness including grinding allowance. i.e. Finish ground dimension plus 0.375mm-0.5mm (0.015”-0.020”)

Spraying Parameters for MK 61 - Molybdenum Wire

  • Acetylene Pressure: 1.03 bar (15 psi)
  • Oxygen Pressure: 1.9 bar (30 psi)
  • Air Pressure: 4.5 bar (65 psi)
  • Flowmeter Point Settings: Gas 5.5, Oxygen 2.25

Demasking

  1. Remove all masking tape.
  2. Remove all overspray, taking care to prevent coating damage.
  3. Remove all traces of No Bond with solvent.

Finishing

  1. Grinding wheel type n° 46 grit blue V grade.
  2. Wet grind to final diameter taking light cuts using feed and speed in accordance with grinding machine manufacturer’s instructions.

Inspection

  1. Check dimensions.
  2. Check for cracks, defects in sprayed coating, i.e. large pores or protrusions and loose particles.

Finish Cleaning

  1. Clean to remove any traces of grinding abrasive and loose particles.
  2. Wash with petroleum spirit/paraffin.
  3. Dry the surfaces with clean, disposable cloths or paper towel.
  4. Final inspection prior to refitting bearings.

Reclamation of Blanket Cylinders Web Offset Litho Press

The same method is used for Plate Cylinders as well as Blanket Cylinders

Reason for use: Rebuilding of corroded cylinders with a more corrosion resistant surface.

Introduction

In the offset litho printing process, there is a requirement to use a mixture of water and ink to achieve the correct density of print.

The introduction of water onto any printing process will inevitably lead to corrosion problems. The blanket cylinder is one of the main casualties of this corrosion, where the moisture seeps under the edges of the composite blanket. It will cause the blanket cylinders surface to corrode away allowing the blanket to be unstable in use.

It is possible to refurbish the corroded blanket cylinders by applying a coating of stainless steel using the Metallisation Arc spray Process bringing the cylinder back to its original size for a fraction of the replacement cost and reducing the chance of future corrosion problems.

The Metallisation Arc spray deposits possess a higher degree of bond strength than most other sprayed deposits and the use of compressed air and electricity alone mean more economic coatings.

Equipment: Metallisation Arc Spray Equipment

Materials: Bond Coat Arc Spray with MSSA 75 Arc Bond - Specially formulated Arc spray bonding wire which gives an exothermic reaction during spraying producing very high bond strength coatings.

Main Deposit: MSSA S16 Wire - Used to produce a dense corrosion resistance coating.

METHOD

Cleaning

  1. Remove blanket retaining strip.
  2. Remove composite blanket.
  3. Degrease by solvent vapour process if equipment available.
  4. Pay particular attention to holes and blanket retaining slot.
  5. Inspect for cracking and longitudinal distortion.

Pre-Machining

  1. Rough turn diameter being sprayed to a depth of 1.25mm (0.050″) leaving a witness of original diameter at both ends of 2mm (0.080″) width.
  2. Remove sharp edge along both sides of retaining slot forming a small radius.

Cleaning

  1. Degrease by solvent vapour process if available.
  2. Check holes and retaining slot are free from contamination and debris.

Preparation

  1. Mask all machined surfaces adjacent to area requiring treatment with heavy duty masking tape.
  2. Plug threaded holes with tapered rubber plugs.
  3. Thoroughly inspect for contamination prior to blasting.
  4. Thoroughly blast with clean no. 30-36 grade aluminium oxide grit.
  5. Ensure that area to be treated is thoroughly blasted paying particular attention to both ends of blanket retaining slot.

APPLICATION OF SPRAYED COATING

Masking

  1. Apply No Bond masking fluid, using a small paint brush to all areas adjacent to the area being sprayed (small amounts of masking fluid on areas to be sprayed can be removed with emery cloth).
  2. Check thoroughly area to be sprayed for contamination.
  3. IMPORTANT: Area to be sprayed should not come into contact with chains, rope slings, hands or any other form of contamination. Delays between blasting and spraying should not exceed 20 minutes.

Bonding

  1. The Arc spray Equipment should be set up in accordance with the MSSA Manual for the spraying of MSSA 75 Arc Bond.
  2. The area to be sprayed should be cleaned with a suitable vacuum cleaner or clean air blast to remove any loose particles of grit.
  3. Apply MSSA 75 Arc Bond to a depth of 75μm-100μm (0.003” – 0.004”).
  4. The blanket cylinder should be rotated to give a minimum surface speed of 18 metres/minute.
  5. The Arc spray Pistol should be set so that the spray stream is at 90° to the surface being coated and traversed at an even speed giving a uniform coating.
    NOTE: It is recommended that both edges of the blanket retaining slot are sprayed with the cylinder stationery ensuring both ends are completely covered.

Spraying Parameters of Bond Coat

  1. Range: 100mm (4")
  2. Nozzle Air Pressure: 3.7 bar (55 psi)
  3. Voltage Before Spraying: 38V
  4. Voltage During Spraying: 34V
  5. Amperage: 200A

NOTE: Parameters may differ in accordance with length and type of powder cables and hoses being used.

Main Deposit of S16 (to be applied immediately after bond coat)

  1. The Arc spray Equipment should be set up in accordance with the MSSA Manual for the spraying of MSSA S16 Wire.
  2. Apply S16 final deposit to the specified thickness including grinding allowance i.e. finished ground dimension plus: 0.375mm – 0.5mm (0.015″ – 0.020″).
  3. The blanket cylinder should be rotated to give a minimum surface speed of 18 metres/minute.
  4. The Arc spray Pistol should be set so the spray stream is at 90° to the surface being coated and traversed at an even speed to give a deposit of not more than 0.13mm (0.005”) per pass.
  5. Using pre-set callipers, check final sprayed deposit thickness to ensure there are no areas below finished sprayed diameter.
  6. Remove loose particles on surface with wire brush or clean air blast.
  7. Allow to cool thoroughly, preferably whilst rotating.

Spraying Parameters of Main Deposit

  1. Range: 150mm (6")
  2. Nozzle Air Pressure: 4.3 - 4.6 bar (65 - 70 psi)
  3. Volts Before Spraying: 38V
  4. Volts During Spraying: 35V
  5. Amperage: 250A

Sealing

  1. Apply Sprayseal ‘M’ in accordance with Metallisation Sprayseal ‘M’ instructions. Keep surface wet by re-application for a period of approximately one hour.
  2. Allow to dry thoroughly.
  3. Remove all uncured sealer from surface with clean, disposable cloths or paper towels.

Demasking

  1. Remove all masking tape and rubber plugs
  2. Remove all over-spray taking care to prevent coating damage
  3. Remove all traces of No Bond with solvent

Finish Grind

  1. Grinding wheel type n° 46 grit blue V grade.
  2. Wet grind to final diameter taking light cuts using feed and speed in accordance with grinding machine manufacturer’s instructions.
  3. Reform radius along edges of blanket retaining slot.

Inspection

  1. Check dimensions.
  2. Check for cracks, defects in sprayed coating, i.e. large pores or protrusions and loose particles.

Finish Cleaning

  1. Clean to remove any traces of grinding abrasive and loose particles.
  2. Wash with petroleum spirit/paraffin.
  3. Dry the surfaces with clean, disposable cloths or paper towel.
  4. Final inspection prior to packing.
  5. Wrap in clean polythene sheet.
  6. Pack and despatch.

On Site Coating of Corrugating Rolls: HVAF & HVOF Tungsten Carbide Thermal Spray Equipment

HVOF tungsten carbide coatings became an industry standard to protect corrugating rolls from wear. Many industry experts have tried to improve the quality/cost ratio of the manufacturing process.

Kermetico's HVAF and HVOF equipment provide a way to apply corrugating roll coatings on site and in-house with higher hardness and ductility and deposits those coatings 5 times faster than conventional HVOF.

Ultra-quality ductile 1,350 – 1,600+ HV300 Kermetico HVAF WC-10Co-4Cr coatings provide a new level of wear protection resulting in consistent coating quality and longer overall life of a corrugated roll. Mobile Kermetico HVAF equipment offers even greater benefits for on-site spraying.

Kermetico HVAF Process

The traditional thermal spray approach is to melt and atomize the feedstock, propel it to the surface of the target part whereupon contact ‘splat cooling’ builds up a coating. The Kermetico HVAF process operates differently. We heat the feedstock material to near its’ liquid phase temperature without exceeding it. Then we accelerate the particles to an optimized high velocity, and when the particles impact the substrate, there is a rapid conversion of kinetic to thermal energy that allows for the plastic deformation of the particle and a bond which we cannot accurately measure.

A 60μm (0.002”)  Thick Kermetico HVAF Coating of a Corrugating Roll with a Thickness Deviation of <10%

In the ASTM 633C bond test, the only result we get is broken glue at 12 KSI, even with 0.040“ (1 mm) of WCCo 88/12. What if you have to use HVOF for some jobs because of old-fashioned specifications? You can use our Convertible system spraying HVAF or HVOF mode with the same gun after a simple and quick hardware setup change.

On-site thermal spray coating of Corrugating Rolls

Kermetico HVAF and HVOF systems are ideal for on-site coating application.

  • It sprays fast:
    • Our HVAF AK7 and HVAF/HVOF C7 spray 550 gram of tungsten carbide per minute (73 lbs./hr.), allowing a reduction of spraying time for a corrugating roll five-fold.
  • It is mobile-friendly:
    • No water chiller – we cool guns with the same air we use for combustion.
    • No oxygen in HVAF mode – we spray with air and gaseous hydrocarbons.
    • Reliable and robust equipment designed for on-site jobs.
  • It is safe and easy
    • Technologically efficient system accepts various fuels and forgives operators’ mistakes.
    • The absence of fumes of sprayed powders makes the coating process less hazardous.
  • We developed some valuable options for on-site jobs:
    • Blast-and-spray grit feeders.
    • Manual Kermetico AK-HH gun for hand-held coating.
    • Instant gas permeability tester to check coating through porosity on-site.

Safety of On-Site Coatings

Safety of on-site tungsten carbide coating deposition depends on the equipment. The HVOF combustion temperature is usually higher than the boiling point of a metal material, which can result in possible hazardous metal evaporation. It is especially dangerous during on-site operation, where ventilation systems could be insufficient. The Kermetico HVAF AK combustion temperature is near most materials melting point, which preheats metals and carbides but does not evaporate them. It prevents oxidation and decomposition of the feedstock material and also keeps the air clean.

On Site HVAF Blasting And Coating

Typically, we apply corrugating roll coatings using robotic blast and spray operations. We blast a surface with a Kermetico HVAF gun (it is extremely fast and uniform) and spray with the same gun after switching the powder feed hose and perhaps changing the nozzle. It is much faster, more accurate and needs much less grit than manual blasting. HVAF grit blasting also produces even surface preparation and induces less stress into the base metal.

HVAF Coating Features

Kermetico HVAF tungsten carbide coatings are superior to HVOF WCCoCr rivals regarding both wear protection and production cost. The high velocity of the in-flight particles (greater than 1,000 m/s| 3,300 ft./sec.) in the Kermetico HVAF process enables the production of very dense coatings with high bond strength. Moreover, the low combustion spraying temperature (1,960-2,010°C | 3,560-3,650°F depending on fuel gas) and gentle particle heating result in minimal feedstock phase transformation and almost nonexistent elemental depletion or decomposition of the in-flight particles.

A Phase Analysis of a WCCoCr Coating (Red) and a Feedstock (Black)

Furthermore, the replacement of HVOF-specific pure oxygen with air in the Kermetico HVAF process significantly reduces the oxide content in the deposited material, which is desirable for high-performance coatings.

For information on the differences between HVOF and HVAF, Click Here.


Rewinder Rollers

Industry: Paper Production

Equipment: Paper Winding Machines, Rewinder Rolls

Principle of Winding Roll: Non-slip coatings are required to provide slip resistance for winding the paper reels.

Service Conditions:

  • Severe abrasion from the paper.
  • High pressure due to the weight of the paper reel.
  • The surface of the roller must not mark the surface of the paper.

Coating Solution: ROCDUR 6750 or ROCDUR 6740 composite flexicords sprayed with TOP JET or MASTER JET flame spray units.

Morphology of Rocdur 6740 (as sprayed)

Benefits of the ROCDUR

  • ROCDUR 6750 or ROCDUR 6740 provides a uniform surface, without segregation or sedimentation of the "hard particles". The roughness is easily controlled by the spray parameters.
  • ROCDUR 6750 or ROCDUR 6740 are dense carbide-metal coating and their hardness is over 60 HRc.
  • The exceptional hardness and compactness of the ROCDUR 6750 or ROCDUR 6740 coating provides an excellent abrasion resistance. It is an ideal choice for all non slip applications requiring wear resistance too.
  • Versus alternative non-slip coatings, the roughness is not caused by the big particles that can flake off: the roughness of the surface is provided by the macroscopic "wave" coming from the coating
    morphology.
  • ROCDUR 6740 is suitable for coating roughness ranging from Ra 8 to 12µm with a Rz ranging from 50 to 65µm. ROCDUR 6740 provides a high linear density of peak (fine micro-structure).
  • ROCDUR 6750 is suitable for coating roughness ranging from Ra 8 to 20µm with a Rz ranging from 70 to 100µm (coarse micro-structure).
  • For higher roughness over Ra 20µm and RZ over 150µm, with a very coarse micro-structure ROCDUR NS is another coating alternative with our Flexicords (contact us for more details).

Bonding: The bonding of the ROCDUR NS is 4000 psi.

Specifications

The morphology of the ROCDUR 6740/6750 coating is a compact structure of metal and tungsten carbide. The hardness of the coating is over 60 HRC.

The roughness is not due to a "big size" of ceramic particle, but is in fact due to "waves" of the coating. This significant feature improves the wear resistance.

ROCDUR 6740/6750 provides coatings with the following roughness features:

  ROCDUR 6740 ROCDUR 6750
Ra μm (μinch) 8-12 (314-472) 8-20 (314-790)
RZ μm (μinch) 50-65 (1970-2560) 70-100 (2760-3940)
Rmax μm (μinch) 60-85 (2360-3350) 70-120 (2760-4730)

Paper Drying Cylinder

In a paper dryer section, multiple drying cylinders heat the moving paper sheet to evaporate water. Steam heats the drying cylinder shell from the inside. The cylinder surfaces are kept clean using oscillating doctors.

The surface of the drying cylinder can deteriorate due to wear and corrosion, leaving marks and other defects on the paper sheet. The paper can also stick to the cylinder surface, causing the paper to break and wrap around the cylinder.

A traditional approach to providing the necessary resistance to wear and corrosion, as well as release (anti-sticking) properties for the drying cylinder surface, was an application of a hard chrome coating with up to 20% PTFE (Teflon-type). However, doctoring results in the rather quick loss of the Teflon-type treatment and wear of the chrome coating.

HVOF spraying of the WC-10Co4Cr inner coating layer and air spraying of the Teflon-type layer is a popular alternative. During operation of the dryer section, the coating is polished by the paper sheet to the necessary roughness due to the removal of the top Teflon-type layer down to the peaks of the WC-coating.

The coating performs even after complete removal of the Teflon layer as the inner WC-layer becomes smoothly polished.

A major problem is non-uniform wear of the coating due to doctoring and the known HVOF technology restrictions for processing high-quality WC-coatings. The application of HVOF WC-coatings is the most time consuming, resulting in a high cost of the coating.

Teflon-type materials have quite low adhesion to WC-based coatings, even to porous ones, resulting in coating failures.

A Kermetico HVAF WC-CoCr – FEP Coating

The Kermetico HVAF process to apply a WC-layer and a Fluorinated Ethylene-Propylene polymer layer for release properties may substantially prolong the life of a drying cylinder surface.

While keeping a similar technological approach for on-site coating applications, the WC-10Co-4Cr coating layer being sprayed with the Kermetico HVAF technology results in the highest quality coating:

  • For processing a dense inner layer, the spray particle size is reduced to 5-30 microns while the particle velocity is increased 1.5 times versus regular HVOF spraying, thus depositing a practically non-porous coating with high hardness (1,450-1,600+ HV300) and high ductility.
  • The outer layer is sprayed with a particle size of 15-53 microns, using a long chamber in the HVAF gun.
  • The Kermetico HVAF process produces WC-based coatings with the highest fracture toughness, exceeding known HVOF coatings by 10-fold. Since the primary mechanism of wear for WC-based coatings is attributed to the material’s brittleness, the Kermetico HVAF coating exhibits the highest wear resistance. This gives our HVAF coating the longest service life.

Kermetico HVAF technology provides a much higher spray rate:

  • With Kermetico HVAF equipment spray rates are increased 4-5 times (up to 33 kg (73 lbs.)/hour)
  • Grit blasting for surface preparation is performed with the same Kermetico HVAF gun, increasing blast rate by a factor of 10 while decreasing grit consumption to 1/100 of that used by vacuum grit blasters.

Kermetico HVAF equipment is portable, providing an on-site coating option.

Fluorinated Ethylene-Propylene (FEP) possesses about the same anti-sticking properties and corrosion resistance as Teflon at a temperature up to 200°C (392°F). However, contrary to Teflon-type materials, the FEP coating has good adhesion to the WC-CoCr coating. Its baking procedure is shorter and requires a lower heating temperature (120°C – 248°F), ensuring better control of the properties and a further reduction of application time.

For more on HVAF Equipment, Click Here.


Winder (Reel) Drums

Winder (Reel) drums operate in pairs at the dry-end of a paper machine. The paper is wound around the first drum under controlled tension through differential surface velocities of the drums, the second drum having a slightly higher surface velocity than the first.

Depending on the paper type, winding speed, winding set up among other parameters, slipping may occur between the paper and the drums.Thus, the required tension is not achieved in the finished paper roll, resulting in the formation of several layers of an out-of-round paper roll. On the later stage in the re-winder (Slitter) section, this final portion of paper (usually, up to 5% of the paper machine production) cannot be re-wound and is scraped.

A traditional approach adopted to prevent the mentioned slipping is to coat the rolls with a coarse tungsten carbide composite coating. Low-velocity combustion flame spraying has been traditionally used due to this work most often being conducted on site. These coatings have been successful regarding stopping slipping, but problems regarding the initial operation, as well as long-term life, have been experienced.

These traditional tungsten carbide coatings consist of large WC powder particles (50-100 microns), bound together by a metal matrix (Cobalt or Cobalt-Chrome). Large particles tend to damage the paper initially when the drum is first operated. Furthermore, the particles are easily plucked from the metal matrix during normal operation. Thus, the coating suffers steadily decreasing performance with time until the coating needs to be stripped and replaced.

Kermetico HVAF WC-CoCr Anti-Slip Coatings

The performance of Winder drums is substantially improved by the application of tungsten carbide composite coatings with the Kermetico HVAF process.

In our process, the grain size of tungsten carbide is reduced down to about 1 micron using agglomerated and sintered WC-10Co4Cr powder, providing high binding of WC-grains in the metallic matrix. Thus, the paper is not damaged by coarse grains of carbide.

  • Kermetico HVAF equipment produces WC-based coatings of the highest fracture toughness, exceeding known HVOF and flame sprayed coatings by at least 10-fold. Since the main mechanism of wear of WC-based coatings is attributed to the material brittleness, the Kermetico HVAF coating exhibits the highest wear resistance. This provides the longest lifetime of the HVAF coating.
  • Finally, the required 0.05mm (0.002”) of coating thickness is applied in only one pass, eliminating defects between the layers known to affect other thermal sprayed coatings. The coating structure, and, therefore, wear during service is uniform, providing a reliable performance of the coating regardless of the remaining thickness.

Kermetico HVAF equipment is portable, providing the required possibility of applying coatings on-site. This is the equipment of the highest productivity (up to 30 kg per hour spray rate with 55-65% deposit efficiency), ensuring the quickest possible application.

For more on HVAF Equipment, Click Here.


Paper Mill Cylinder

A large engineering component was metal sprayed over its entire length by Metalliseringsverket A/S of Oslo, Norway. The component, a massive cylinder, has been surfaced with an acid resistant stainless steel as it is destined for use in a North American Paper Mill and the paper making process involves the use of toxic chemicals, 1.524m (5ft) in diameter and 10.97m (36ft) in length, the cylinder weighs 18 tons and was fabricated in Norway.

The surface was prepared by rough cutting to a depth of 500microns (0.20”) followed by grit-blasting. A mixed bond coating of aluminium bronze and carbon steel was then applied followed by an intermediate deposit of S2, a further layer of a mixed deposit of S2 and stainless steel was then applied. The final coating of approximately one ton of stainless steel was then sprayed. The work was carried out using two Metallisation Arc Spray Pistols in tool-post mountings and a total of one and a half tons of wire was deposited. Flame Spray and Plasma Spray techniques can also be used.


Anilox Rolls

Another application in the pulp/paper industry is the application of plasma-sprayed, chrome oxide coatings on anilox rolls. This is a critical application whereby a dense and homogeneous coating is required.

The Anilox rolls are sprayed with a nickel based bond coat followed with a Cr Oxide top coat ensuring a dense, homogenous product. A low porosity (<1%) coating is required for a superior wear-resistant coating and provides a smaller contact surface for the ink.

The anilox coated rolls are finally diamond ground and laser engraved to produce a surface profile which will deliver a controlled amount of ink to the paper being printed with long-term wear resistance.

For more information on Metal Spray equipment or consumables, call us on 07 3823 1004, or email us using our contact form.