Analysis of what is metal protective film?
Aug 22, 2022
The protective performance of the protective film is related to those factors?
When the metal reacts with oxygen or other oxidants in the air, a layer of metal oxide will be formed on the surface of the metal. This layer of oxide hinders the continuation of corrosion to a certain extent, so it is called a metal protective film.
The protective performance of the protective film is related to the integrity of the film, and it is also related to whether it is firmly bonded to the main metal, whether the expansion coefficient is similar, and so on.
If the oxide is porous, loose, and does not bond well with the host metal, the protective properties of the film will be poor. Strong, thin films are better at protecting metals because such films are generally produced on smooth metal surfaces, have good adhesion to metals, and their thermal expansion coefficients are closer.
