Black spots on the surface of aluminum may be caused by oxidation and dirt accumulation, and the treatment methods are as follows:
1. Clean the surface: Clean the surface with a mild cleaner, such as neutral detergent or car cleaner. You can use a soft brush or sponge to clean, do not use too hard cleaning tools.
2. Polishing surface: The use of metal polishing agent or polishing agent to polish the surface can remove the oxide layer and attached dirt on the aluminum alloy surface. Use a soft cloth or sponge to clean the surface and ensure that the aluminum alloy surface is smooth and clean, and will not be scratched and damaged.
3. Anti-rust treatment: After polishing, apply some protective agent with anti-rust properties. This can improve the corrosion resistance of the aluminum alloy surface, reducing future oxidation and pollutant deposition.
The above are several conventional aluminum alloy surface black spot treatment methods, if the aluminum alloy surface black spot is too serious, it is recommended to contact professional aluminum alloy product enterprises or skilled maintenance masters for treatment.