Phosphating is a commonly used pretreatment technology. In principle, it should belong to chemical conversion film treatment. It is mainly used for phosphating on the surface of steel, and non-ferrous metals (such as aluminum and zinc) can also be phosphating.

Anodic oxidation: on the surface of aluminum, a layer of alumina would be produced through electrochemical principle. This oxide film has special properties.

The rapid development of the new energy vehicle market has boosted the demand for aluminum foil. As a new application market, aluminum foil for battery will drive the demand for aluminum foil to show a rapid growth trend.

Usually die-casting aluminum is suitable for die-casting process.It has a set of high-tech core-pulling, cooling and other systems. Casting is a metal smelting process, usually using the gravity of the metal in the mold casting. But aluminum die casting is not done by gravity, but by applying pressure.

Therefore, it is necessary to understand the structure, composition and treatment characteristics of aluminum alloy anodizing treatment. It is very widely used and plays an unparalleled role in some treatment methods.

In recent years, aluminum bottle caps (chromize free passivation for aluminum) are more and more widely used in our daily life, especially for the packaging of wines, beverages and medicines and health products.