Thermal Spray Coatings: The Processes

Posted by ThermalSprayGuy on May. 29, 2012

Longevity Coatings, Allentown, PA-based company, specializes in four main thermal spray coating processes. They are: TWIN ARC. This process is often used for heavy coating build-up and salvage/repair applications, where very hard surfaces are required. In this example, we are rebuilding the journal surfaces of an agitator. Longevity’s computer-controlled system ensures coatings of consistency and repeatability. PLASMA (NON-TRANSFERRED ARC) Here, a nitrogen hydrogen plasma plume is used to deposit a plasma coating of chromium oxide to a shaft. Because of the extreme temperatures reached with plasma, often up to 30,000?F, this process is ideal for high melting point materials such as chromium oxide, aluminum oxide, other ceramics as well as refractory materials. DIFFUSION BONDING. This process produces a fully dense hard surfacing with a metallurgical bond. In this example, a nickel chromium hard-facing alloy coating is being applied. A post-treatment will bring the coating to its plastic state and it wil

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Tags ceramic coating, thermal spray coatings, thermal spray coatings processes, hvof process, plasma process, high velocity oxygen fuel, diffusion bonding, non transferred arc process, twin arc process, carbide coating, protective coating, longevity coatings

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