Material selection of aluminium anodizing product before anodizing

There are many anodizing methods for aluminum alloy, which can be used in daily life. It is thought that the characteristics of this process can produce a hard protective layer on the surface of aluminum parts, which can be used to produce kitchenware and other daily necessities. However, the anodizing effect of cast aluminum is not good, the surface is not smooth, and it can only be black. Aluminum alloy profile is better. Here is a brief introduction to the anodizing treatment of aluminum plates.

In recent ten years, aluminum anodizing coloring technology in China has developed rapidly. Many factories have adopted new technology and accumulated rich experience in actual production. There are many mature and developing anodizing processes for aluminum and its alloys. The appropriate process can be selected according to the actual production needs.

Before selecting the anodizing process, the material of aluminum or aluminum alloy should be understood. Because the quality of materials and the difference of components will directly affect the quality of aluminium anodizing product.

aluminium anodizing product

For example, if there are bubbles, scratches, peeling, roughness and other defects on the aluminum surface, all defects will still be exposed after anodizing. The alloy composition also has a direct impact on the surface appearance after anodizing.

For example, aluminum alloys containing 1~2% manganese show brownish blue after anodizing . With the increase of manganese content in aluminum, the surface color after anodizing changes from brownish blue to dark brown.

Aluminum alloy containing 0.6~1.5% silicon is gray after anodizing , and it is white gray when containing 3~6% silicon.
Those containing zinc are milky, those containing chromium are golden yellow to gray, and those containing nickel are light yellow.

Generally speaking, only aluminum containing gold with magnesium and titanium content greater than 5% can obtain colorless, transparent, bright and clean appearance after anodizing .

After selecting aluminum and aluminum alloy materials, it is natural to consider the selection of appropriate anodizing process.