The Surface Blackening Reasons Of Industrial Aluminum Profiles

The industrial aluminum profile is corrosion-resistant, has a beautiful surface, and has a wide range of applications. The surface of the aluminum profile is a natural silvery white, which is very beautiful. However, there are also some industrial aluminum profiles that will turn black and dark on the surface, which greatly affects the aesthetics of the equipment. Today we will analyze the reasons for the blackening of the surface of industrial aluminum profiles.

1. Material problem. Some industrial aluminum profiles turn black and dark as soon as they are bought. This should be a material problem. The iron content in the aluminum alloy exceeds the standard, and some are smelted with scrap aluminum. Such industrial aluminum profiles are cheap, but their mechanical properties are obviously insufficient.
2. There is no anodizing treatment, which is what we commonly call the base material and material. The surface of this industrial aluminum profile has not been oxidized, only a naturally formed uneven, very thin oxide film. Because aluminum is an active metal, it is more likely to oxidize, blacken and mold under certain temperature and humidity conditions.
3. The cleaning agent is corrosive to a certain extent. If the industrial aluminum profile is cleaned with the cleaning agent, if there is too much residue, it will cause corrosion to the industrial aluminum profile.
4. Some industrial aluminum profiles need deep processing after production, and deep processing such as milling and punching requires emulsifier spray, so the processed industrial aluminum profiles need to be sprayed and cleaned. In order to save costs, some manufacturers do not clean, or do not clean thoroughly, resulting in residues of emulsifiers, which will corrode the aluminum profiles for many years and cause the surface to turn black.

The above points are the main reasons for the blackening of the surface of industrial aluminum profiles, and there may be other factors that are not well kept. In short, if the surface of industrial aluminum profiles is to be bright and new for a long time, it is necessary to grasp the material from the source, clean it regularly, and keep it properly.