5052 aluminum plate products belong to aluminum-magnesium alloy aluminum plate, which is widely used, especially the alloy aluminum plate that the construction industry cannot do without, and it is also the most promising aluminum alloy plate. The main alloying element of 5052 aluminum plate products is magnesium, which has good corrosion resistance, excellent weldability, good cold workability, and medium strength.

The electrolytic coloring of 5052 aluminum plate products has good decorative properties, so it has been widely used at home and abroad, especially in the production of aluminum profile construction surface treatment. At present, the main process is to use tin-nickel mixed salt electrolytic coloring to color the product into champagne color. Compared with single nickel salt coloring, the color of tin-nickel mixed salt electrolytic coloring products is bright and full; the main problem is the color difference of the product, the aluminum production process Both the extrusion process and the oxidation coloring process in the product will lead to product color difference.

The influence of extrusion process on oxidation coloring is mainly due to the influence of die design, extrusion temperature, extrusion speed and cooling method of 5052 aluminum plate products on the surface state and uniformity of the extrusion profile. The mold design should be able to feed the material fully and knead, or light (dark) belt defects are prone to occur, and color difference may appear on the same profile; at the same time, the state of the mold and the extrusion method of the profile surface will also affect the oxidation coloring. The extrusion temperature, speed, cooling method and cooling time are different, which will make the profile structure uneven and cause color difference.