Six Major Effects of Thermal Spray Coating

thermal spraying

Enhance surface hardness

Working conditions that may cause wear during the operation of the workpiece include vibration, sliding, impact, abrasion, erosion, and the like. Thermal spray anti-wear coatings should be time resistant to heat and chemicals.

In the aerospace industry, thermal spray coatings can withstand the adverse effects of air impact and erosion on engine blades. It is possible to use titanium as the engine blade. Compressor seal rings are also typically treated by thermal spraying.

Recover size

Thermal spraying is a cost-effective way to restore the size of the workpieces. Whether it is work wear or machining tolerance caused by the size of the workpiece is not required, thermal spray can fill and change the surface. This method does not cause deformation and is not as expensive as a special plating process. At the same time, the new surface consists of a wear-resistant or corrosion-resistant material or the same material as the workpiece.

The turbine blades of hydropower stations are subject to high drop and long-term erosion of corrosive substances, and their thickness is significantly thinner. The coating not only restores the thickness of the blade, it also makes it more resistant to impact and corrosion.

High-temperature oxidation resistance

A special coating is sprayed into the combustion chamber of the jet engine to resist high-temperature oxidation during operation. After spraying the anti-high temperature oxidation coating on the chimney of the factory and the ship, the service life is increased by five times.

Thermal barrier coating

Thermal barrier coatings are commonly used in diesel engine pistons, gas turbine combustion chambers, valves, and flame stabilizers. After thermal spraying, it resists the high temperature and high pressure in the working environment and reduces the working temperature of the substrate to 10 °C-65 °C.

Cavitation resistant coating

In order to deal with the erosion of the salt atmosphere, the wellhead device on the sea surface has been sprayed since the 1950s. This technology has been used for external protection of conical cooling towers, oil and propane gas storage tanks.

Chemically resistant coating

The thermal spraying of the inside of the liquid freight car can ensure the purity of the liquid goods and prevent the pollution of the iron magazine. Spraying zinc on railway vehicles can effectively prevent corrosion and it is not necessary to carry out paint operations during operation. Thermal spray coatings can also be used to protect freshwater pipelines, water towers and gates of water systems. These facilities can be used for ten years without being repaired after spraying. Thermal spraying is also widely used in offshore engineering. For the hull, deck, concrete part of the barge, large flat body, tugboat, etc., thermal spraying has achieved good long-term protection. The US Navy has done a lot of work and has been fighting the corrosion of ships.

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