Improved component properties via thermal spraying

If you are looking for more sustainable ways to use materials, thermal spraying is simply impossible to ignore. This form of surface treatment — which actually refers to a range of technologies — allows you to create components with improved esthetic , corrosion-resistance and mechanical properties, without any impact on the core of the material. Discover everything you need to know about thermal spraying on this page!

the basic principle

Thermal spraying

In thermal spraying, a metallic powder is heated by a gas flow before being 'fired' at a substrate at high speed

(> 1000 m/s). On impact, the molten powder forms a dense, homogeneous and pore-free coating with exceptionally high adhesive strength. The heat input into the core of the material remains limited at just 90°C, preventing any chance of internal tension, structural changes or tearing.

Different thermal spraying methods

Typical coatings

  • Carbide materials (hard metals, tungsten carbide, chromium carbide)
  • Hard chrome replacements
  • Pure metals (copper, nickel, aluminium etc.)
  • Molybdenum
  • Inconel, Hastelloy, Stellite, Colmonoy, titanium
  • Self-fluxing alloys (Ni-Cr-B-Si)
  • Cermets (composites)


RIP: hard chrome

After having been included on the REACH authorisation list for several years, the use of chromic acid (chromium trioxide) as a surface-treatment method will only be permitted for certain applications from 21 September 2024. What's more, only operators licenced under the CTACSub decree will be permitted to use this substance. Fortunately, thermal spraying is the perfect alternative to hard chroming, without ever compromising on the end result. We're more than happy to help you find a solution to any issues this decision may cause!


De Beleyr-Engineering is happy to help you in your search for an alternative that does not contain Chromium-6!

The benefits

As a process, thermal spraying offers several major benefits compared to other forms of surface treatment.


  • Little or no heat input
  • Little surface oxidation
  • High coating hardness

The result

Following the process, you'll see significant improvements in the properties of the treated part across several aspects.


  • Extremely high hardness
  • Low friction resistance
  • High corrosion resistance (plus erosion, abrasion and fretting resistance)
  • Improved tensile strength
  • Electrical insulation
  • Electrical conductivity
  • Chemical resistance
  • Thermal insulation (TBC — thermal barrier coating)
  • Non-stick properties

Learn to recognize wear and save time. And money

Wear is both a critical and inevitable factor in manufacturing companies. However, it pays off to acquire knowledge about the different wear patterns. This will allow you to pinpoint more quickly when a form of wear - whether it's corrosion, surface fatigue, or oxidation - manifests itself. And you won't have to deal with unplanned downtime!


Learn more about wear patterns.


What applications is thermal spraying suitable for?

Protect seal faces against wear from gaskets / Seals / Ground balls / Protection against aggressive environments (saltwater) / Protection of pump housings and pump impellers against chemical corrosion / Repairs or size corrections of worn axle journals or bearing seats / Rotary valves and dosing valves / Extrusion screws / (Grip) wheels and (drive) rollers / Filter nets / Bearing housings / Bushings / Blades and rotor knives / Compressor pistons / Pumps (axles and bushings) / Pump axle bushings / Rotors / Scrapers / Propellers and propshafts / Seals and gaskets / Wear plates / Dust hoses or ducts / Screw conveyors / Turbines / Piston Rods / Etc.