The U.S. Air Force is evaluating two cold spray processes.

The U.S. Air Force Research Laboratory has recently, through evaluation, validated two cold-spray deposition technologies that make it possible to apply tungsten carbide–cobalt (WC-Co) coatings to high-strength steel components in aircraft. If subsequent tests are successful, these technologies could serve as an alternative to electroplated hard chrome (EHC).

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Cold spray equipment

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Thermal Barrier Coating

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The U.S. Air Force is evaluating two cold spray processes.

The U.S. Air Force Research Laboratory has recently, through evaluation, validated two cold-spray deposition technologies for tungsten carbide-cobalt ( WC-Co ) Coating for high-strength steel components used in aircraft becomes possible. If the upcoming trials are successful, these technologies will be used for electrolytic hard chrome plating. EHC Alternative methods for electroplating.

The U.S. Air Force aircrew widely uses [this] when repairing and modifying damaged aircraft landing gear components, hydraulic cylinder actuators, propeller hub assemblies, and gas turbines. EHC Electroplating process. Chrome plating can provide excellent metallic properties, such as hardness, wear resistance, corrosion resistance, and smoothness. However, EHC Hexavalent chromium, used in electroplating, is a well-known carcinogen; therefore, the federal regulatory agency imposes strict controls on its use and handling. Compliance with these regulations has led to increased processing costs and also heightened the responsibilities of the U.S. Air Force.

The U.S. Air Force and other departments of the Department of Defense are currently studying the use of... WC-Co High-speed flame thermal spraying to replace EHC Electroplating. Laboratory engineers have launched several projects to verify and confirm. HVOF Performance and limitations of thermal spraying. They confirmed that when using a high-strength steel substrate ( substrate ) is appended with a value higher than 190ksi after the pressure, use HVOF Thermal Spraying Method's WC-Co Cracks will appear, layers will separate, and it will crumble. In... HVOF During the application process, the high temperatures experienced by the coating material will cause... Toilet It generates brittle phases and also subjects the coating material to high internal stresses. Cold spray deposition, which is carried out at low temperatures, can produce... EHC A ductile coating similar to electroplating.

Due to the promising results of this initial assessment, the laboratory will implement a more comprehensive validation and verification plan to determine the mechanical properties of the coatings achieved through the optimized process. Cold spray technology will help reduce environmental dependence, emissions of hazardous waste, and the United States’ continued reliance on... EHC The operational challenges faced during electroplating.

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