TriCom® Coating
TriCom is a proprietary electrodeposited composite tribological coating developed to provide excellent wear and oxidation protection for metallic sealing systems. It comprises a unique matrix of cobalt co-deposited with chromium carbide (Cr3C2) particles to create a wear and oxidation-resistant system for prolonged use at high temperatures.
Among others benefits, TriCom parts are coated to near net shape without the need for secondary operations. Thermal spray coatings, on the other hand, often need to be ground or polished to meet tight tolerances and ensure an acceptable surface finish.
TriCom®
TriCom: This coating comprises a matrix of cobalt co-deposited with chromium carbide (Cr3C2) particles, providing wear and oxidation resistance for prolonged use at 1150°F (621°C) and limited use at 1250°F (677°C). TriCom is suitable for mildly oxidizing environments and is primarily used in static applications or low-speed dynamic systems.
TriCom-HT™
TriCom-HT is a more advanced coating, consisting of a cobalt-nickel alloy matrix co-deposited with chromium carbide (Cr3C2) and MCrAlY particles. It is designed for high-temperature applications, offering prolonged use at 1400°F (760°C) and limited exposure up to 1550°F (843°C). This coating balances wear resistance with oxidation resistance, making it suitable for high-temperature static sealing applications where differ
Electrochemical Plating
Electroplating and spray coating are both surface treatment methods, but they have different advantages and limitations.
Electroplating can be a better choice than spray coating in certain situations for the following reasons:
Uniformity and Precision
Electroplating provides a more uniform and precise coating thickness over the entire surface of the component, even in complex geometries and recessed areas.
Adhesion
Electroplated coatings generally exhibit stronger adhesion to the substrate compared to spray coatings, as they form a metallurgical bond with the base material during the electrochemical process.
Surface Finish
Electroplated parts often have a smoother and shinier finish compared to spray-coated parts. Spray coatings may require additional finishing operations, such as grinding or polishing, to achieve the desired surface finish.
Less Distortion
The electroplating process generates less heat and is less likely to cause dimensional distortion in thin or delicate components compared to thermal spray processes.
Cost-effectiveness
Electroplating can be more cost-effective than spray coating, especially for high-volume production, as it requires fewer secondary operations and often results in less material waste.
Aerospace Applications for Plated Metal Seals
Engines and propulsion systems: Metal seals are used in various components of aircraft and rocket engines, such as combustion chambers, fuel and oxidizer systems, and exhaust nozzles. They help maintain the integrity of these systems and prevent leaks, ensuring optimal performance and safety.
Hydraulic systems: Aerospace hydraulic systems require high-performance seals to withstand high pressures and temperatures. Metal seals are used in components like actuators, pumps, and valves to maintain pressure and prevent fluid leakage.
Fuel systems: Metal seals are used in fuel tanks, fuel lines, and fuel control valves to ensure the safe and efficient storage and transfer of fuel within an aircraft or spacecraft.
Environmental control systems (ECS): Metal seals are used in components that regulate temperature, pressure, and humidity inside an aircraft or spacecraft. They can be found in heat exchangers, pressure regulators, and air conditioning systems.
Cryogenic systems: Metal seals are crucial in cryogenic applications, such as in liquid oxygen and liquid hydrogen storage tanks and transfer lines. They provide reliable sealing at extremely low temperatures and prevent leaks.
Avionics and electronics: Metal seals are used in electrical connectors and cable feedthroughs to maintain the integrity of electronic systems and protect them from the harsh aerospace environment.
Landing gear systems: Metal seals can be found in the hydraulic components of landing gear systems to prevent fluid leakage and ensure smooth operation during takeoff and landing.
Oxygen systems: In life support systems, metal seals are used to prevent leaks and maintain the proper pressure in oxygen supply lines and storage tanks.
FAQs
Expand each section below for answers to frequently asked questions on coatings and platings for metal seals.