Thermal Spray coating services

Our proprietary detonation gun (D-Gun) and Super D-Gun^TM thermal spray coating processes are the leading solutions for parts that require extraordinary wear performance and mechanical properties. They combines gas and powder in controlled detonations to generate outstanding coating bond strength and coating density. 

Both D-Gun and Super D-Gun thermal spray coating processes typically use tungsten carbide or chrome carbide powders with a variety of metallic binders.

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This economical thermal spray coating method accurately mixes and burns a fuel with oxygen while wire or powder feedstock is fed into the torch. The feedstock material melts and is projected onto the surface by the highly concentrated combustion gas stream. This thermal spray coating process can apply a range of high melting temperature materials yet is also ideal for applying bond coat materials. A typical flame spray thermal coating application includes molybdenum for automotive parts which substantially increases the parts surface performance. 

Invented by Praxair Surface Technologies, HVOF is an internal combustion system that generates a supersonic flame jet for heating and accelerating powders to form the surface coating. The HVOF thermal spray coating process allows us to uniquely control application variables, resulting in high-density thermal spray coatings and strong bonds with repeatable composition, structure and properties.

Typical thickness of HVOF thermal spray coatings ranges from 0.002 to 0.020 inches (50 to 500 µm), and as-deposited surface roughness may exceed 100 µin (2.5 µm) Ra. HVOF thermal spray coatings may also be used as deposited or ground and lapped to meet your needs. HVOF thermal spray coatings can provide resistance to erosion, abrasion and chemical attack. 

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Advanced HVOF CoreGard^TM coatings offer lasting protection for internal diameters with longer lengths. The REACH-compliant coating prevents abrasion and erosion on parts such as cylinders, metal pipes, sleeves, and tubes. CoreGard thermal spray coating can be applied on inside diameters ranging from 71 mm to 210 mm (2.8 in to 8.3 in) with lengths up to 3000 mm (118 in).

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Advanced HVOF ExoGard^TM thermal spray coatings are dense, thin, and smooth, and designed to provide abrasion, corrosion and erosion protection at low thicknesses. Four families of coatings have been developed to address different market needs from replacing hard chrome plating for REACH-compliance to creating best-in-class coatings for wear protection. 

• ExoGreen^TM: Thin, cost-effective replacement for hard chrome plating
• ExoPro^TM: Tough, thin and smooth and performs better than hard chrome plating 
• ExoShield^TM: Fully dense, hard and tough that offers best-in-class wear protection 
• ExoFilm^TM: Ultra-thin, hard chrome replacement for textured surfaces

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Plasma-sprayed coatings, invented by Praxair Surface Technologies, are created by heating and accelerating powder material in a high-temperature plasma stream and projecting it against the surface. Standard production coatings include pure metals, metallic alloys such as nickel or nickel-chrome-aluminum, oxides such as alumina or yttria stabilized zirconia and cermets. Thermal spray plasma coatings are used to improve wear resistance, corrosion resistance and thermal insulation. Plasma spray coating is typically used in the aerospace industry, biomedical industry and on household items to improve functionality and extend overall lifespan. 

Praxair Surface Technologies offers the following plasma spray coating services:

• Traditional Plasma Spray
• Low-Pressure Plasma Spray (LPPS)
• Shrouded Plasma Spray
• Suspension Plasma Spray

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Also known as electric arc spray, wire arc spray is used in a variety of situations from high-volume, low-cost applications to high-quality aircraft coatings that have since replaced plasma spraying. This thermal spray coating process produces an electric arc between two consumable electrodes of a coating material and uses compressed gas to atomize and propel the material to the substrate. One advantage of this thermal spray coating system is that two different wires can be used together to create a pseudo-alloy which can be selected based on service environment and intended level of performance. This type of thermal spray coating process can provide wear resistance, corrosion protection and dimensional restoration.