Metal components are meant to be used or operated in different environments. Some of those environments are very harsh in that they have very high temperatures, are very corrosive, or are very reactive among other conditions. Such environments are able to cause very severe effects when they come in contact with metal components, which may lead to a significant reduction in durability, aesthetic value, and functionality among others. To curb the effects of such environments, diffusion coatings were invented.
The process of applying a diffusion coating on a metal substrate is called diffusion coating too. This process is done inside a chamber at temperatures that are very high. Various metals such as nickel, iron, and cobalt are activated thermally during the procedure. Before the process can start, the substrate needs to be cleaned thoroughly first. Cleaning can be done through various methods, but abrasive blasting is commonly used. Cleaning is for removing dirt and other undesirable materials from the surface of substrates.
After proper cleaning has been done, the component is placed inside the container and the coating material added. The container is then completely sealed and placed into a furnace, which may be in the form of a chamber. The temperature of the furnace is then raised to very high levels in the range of 380 to 425 degrees Celsius.
When certain temperatures are attained within the aforementioned range, diffusion occurs to the metal. This makes it to make an alloy with the substrate. The nature of the substrate and the kind of metal used dictate how much time this process can last. However, most processes last from two hours to four hours. The substrate must be continuously turned throughout the process to achieve equal thickness.
When the process is finished, the coating that results is usually smooth and has a uniform thickness. The thickness can be varied depending on the purpose the components is meant to do. However, typical thicknesses are between 15 to 80 micrometers. The coating takes the color of the metal used and common ones include chromium, silicon, aluminum, and iron. Various materials can also be coated including nickel, steels, cobalt, and iron among many others.
The coating is resistant to erosion, oxidation, and reaction with air, water, and other substances. A lot of reliability, durability, and strength is achieved in components that are needed in critical functions. Pump impellers, power generation constituents, gave valves, and components or gas turbines engine like vanes, blades, and cases are examples of parts that usually get coated through this method.
The process is used mostly in industrial settings and few household equipment have components that are coated this way. The technology was invented several years ago and has been undergoing a lot of modifications aimed at perfecting it. Currently, there are better methods and technology for doing it.
Modern day furnaces are very efficient and have improved functionality because they incorporate several features. The coatings achieved today are thin yet very durable, strong, and efficient at avoiding corrosion. This technology is highly employed in the automotive industry.
The process of applying a diffusion coating on a metal substrate is called diffusion coating too. This process is done inside a chamber at temperatures that are very high. Various metals such as nickel, iron, and cobalt are activated thermally during the procedure. Before the process can start, the substrate needs to be cleaned thoroughly first. Cleaning can be done through various methods, but abrasive blasting is commonly used. Cleaning is for removing dirt and other undesirable materials from the surface of substrates.
After proper cleaning has been done, the component is placed inside the container and the coating material added. The container is then completely sealed and placed into a furnace, which may be in the form of a chamber. The temperature of the furnace is then raised to very high levels in the range of 380 to 425 degrees Celsius.
When certain temperatures are attained within the aforementioned range, diffusion occurs to the metal. This makes it to make an alloy with the substrate. The nature of the substrate and the kind of metal used dictate how much time this process can last. However, most processes last from two hours to four hours. The substrate must be continuously turned throughout the process to achieve equal thickness.
When the process is finished, the coating that results is usually smooth and has a uniform thickness. The thickness can be varied depending on the purpose the components is meant to do. However, typical thicknesses are between 15 to 80 micrometers. The coating takes the color of the metal used and common ones include chromium, silicon, aluminum, and iron. Various materials can also be coated including nickel, steels, cobalt, and iron among many others.
The coating is resistant to erosion, oxidation, and reaction with air, water, and other substances. A lot of reliability, durability, and strength is achieved in components that are needed in critical functions. Pump impellers, power generation constituents, gave valves, and components or gas turbines engine like vanes, blades, and cases are examples of parts that usually get coated through this method.
The process is used mostly in industrial settings and few household equipment have components that are coated this way. The technology was invented several years ago and has been undergoing a lot of modifications aimed at perfecting it. Currently, there are better methods and technology for doing it.
Modern day furnaces are very efficient and have improved functionality because they incorporate several features. The coatings achieved today are thin yet very durable, strong, and efficient at avoiding corrosion. This technology is highly employed in the automotive industry.
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