ENGINEERING

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ALUMINUM DIFFUSION

Gas turbine hot section components (blades / vanes / seals / cases) of land based engines are routinely coated with Aluminum Diffusion Coatings as this process has been vastly accepted for improved oxidation and corrosion protection. Aluminum diffusion coatings have been engineered and developed for an improved and balanced oxidation life. Components treated with this process also enjoy a bonus - increased material mechanical performance, adding up to extended life cycles and lower operating costs! The coating microstructure compositions are modified by diffusion coatings in that a chemically bonded, resolute coating, which acts as a barrier and inhibits oxygen and other elements from entering into the base materials substrate. Active elements are incorporated onto the surfaces (external and internally) of the components. Then through controlled heat treatment become thermally activated and diffuse into the surfaces of the components. This environmentally friendly, safe and relatively inexpensive process has been developed to produce a highly reliable, improved oxidation resistant coating while enhancing mechanical properties of critical components. This coating continues to be widely used in: Power Generation components, Pump Impellers, Valve Gates, Diesel Applications. Basic materials that are enhanced by the Diffusion Coating Process are Cobalt, Nickel, and Iron based metals especially when operating in severe service conditions.

dense coatings

HVOF produces coatings that achieve porosity levels below one percent. our in house Lab assures coating quality prior to initiating production cycles.

high bond tensile strength

bond tensile tests are used to test coating adhesion. HVOF has a minimum bond tensile strength of10,000 psi (the limit that the testing epoxy compound is capable of).

wide array of coatings available

HVOF is a mechanical bond coating which readily allows the application of dissimilar materials, for example light-weight aluminum can be coated with tungsten carbide. this allows the machine-ability and light-weight of aluminum but the coated surface has the wear resistance of tungsten carbide. Typical coatings are: Chrome carbide, tungsten carbide, Nickel, Cobalt and blends of other metallic elements. these blends can be customized (by our engineering staff) to suit the demands of your application.

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