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Why do aluminum profiles turn black?

2022-01-21
Knowledge|Why do aluminum profiles turn black?

Aluminum profile is a non-ferrous metal profile that is extruded by die and oxidized and coated. The aluminum profile is treated by anodizing and other treatments, and there is an oxide film on the surface, which makes the profile have the characteristics of corrosion resistance and corrosion resistance. Recently, some users found that the aluminum profiles turned black during the use of aluminum profiles. Let us popularize the reasons for the blackening of aluminum profiles.

1. The aluminum profile process is not up to standard: the aluminum profile is extruded from an aluminum rod and then oxidized and coated. The selection of raw materials for aluminum rods, improper cleaning or pressure inspection of aluminum profiles in the production process, and uneven coating during the oxidation process of aluminum profiles will all lead to blackening and mildewing of aluminum profiles. We use 6063-T5 aluminum rods, which are not doped with waste, and undergo a strict extrusion production process. Ensure the quality of aluminum profiles from the source.
2. Improper storage management: Although aluminum profiles are waterproof, corrosion-resistant and corrosion-resistant, if they are in a humid environment for a long time, they will be in direct contact with uneven ground. Then it will also cause the aluminum profile to wear and tear, and the oxide film will be damaged, which will cause the aluminum profile to become moldy and black. In view of this situation, aluminum profiles can be stored in a dry and ventilated environment, and direct contact with the ground should be avoided.

3. Unreasonable cleaning management: The surface of the aluminum profile is anodized and generally does not need to be cleaned. If there is dust, just wipe it gently with a soft cloth. If a corrosive cleaning agent is used, the surface of the aluminum profile will be corroded and oxidized, resulting in mildew and blackening of the surface of the profile.


With the development of technology and the improvement of the level of social development, the market demand for aluminum profiles is also increasing, and various manufacturers have sprung up like bamboo shoots after a rain. If you choose a bad cooperative manufacturer, the loss will be heavy, not to mention the possibility of introducing inferior products and causing major safety accidents.