: The aluminum layer forms a stable oxide skin (alumina) that acts as a barrier against moisture and oxygen.
: The metal part is "packed" into a mixture of aluminum powder, an activator, and an inert filler, then heated in a furnace. This causes the aluminum to diffuse into the surface, creating a protective aluminide layer . aluminise
: The most common method, where the substrate (like a steel sheet) is submerged in a bath of molten aluminum. Upon cooling, a thick, robust layer forms that is often used for large structural components. : The aluminum layer forms a stable oxide
: Aluminum halide gases are used to deposit the coating. This is ideal for complex shapes or internal surfaces, such as turbine blades, that are difficult to reach with other methods. Common Applications : The most common method, where the substrate