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High Velocity Oxygen Fuel (HVOF) coating is a thermal spray coating process, which is often applied to enhance or restore a component's surface properties. This surface engineering technique better enables life extension of equipment by increasing erosion and wear resistance, and corrosion protection. An array of materials can be applied using the HVOF process in thicknesses ranging between 0.05mm to a few mm.
Arc Wire Sprayed Coatings
Arc spraying lends itself to forming a very high bond strength between the coating and the substrate, and produces dense coatings at very high deposit rates. Another feature of this process is that it allows for the feeding of different metal wires simultaneously through each electrode to produce a unique coating.
Plasma spraying is used to apply ceramic, cermet or metal coatings in several industry sectors. These coatings are designed to provide wear and corrosion protection, or to give functional properties such as thermal barrier or thermal insulation advantages.
Flame Sprayed Coatings
Combustion flame spraying can be used to make repairs, improve efficiency and restore dimensions. It is often a cost-effective method when repairs are required to high cost components. It is most often used for applying coatings that have high oxide and porosity levels and can be used to achieve rough coatings. They also provide very low stress coatings, therefore allowing very thick coatings to be applied.
The combustion spraying process, compared with others, is relatively low energy and can be used to spray substrates that cannot be exposed to high temperatures. This can help when component distortion and structural damage is an issue. There are two forms of combustion spraying, using powder or wire stock material, each suited to different applications.
Thermal Spray Coating
Utilising the latest Oerlikon Metco and Praxair Thermal Spray equipment, ancillary acoustic booths and robotic manipulation our sites include HVOF, High Energy Plasma Spray, High Energy Arc Spray and general purpose Gas Thermal Spray Coating equipment.
The coatings department is underpinned by Precision Diamond, Grit Grinding Machines and German Diamond Super Finishing equipment. We also have a full tool room and welding operation in order to create accurate tooling for coating requirements on client supplied components.
Thermal Spray Coating allows coating of high performance metals such as tungsten carbides, alloys, ceramics, cermets and chrome carbides etc to be applied to much more economical and relatively easy to work with base materials. The various coating processes can offer more superior component performance against wear, heat, oxidization and corrosion resistance.
Often used in the reclamation of damaged or worn components, thermal spray coating offers a cost-effective alternative to buying new parts. This is also a viable alternative for discontinued components that are no longer available for purchase or to reduce downtime on items which would have otherwise had long lead times to remanufacture.
Our metallurgists can offer support and guidance of the most suitable coatings to meet your requirements.