Aluminum and aluminum alloys are metal structural materials with a wide range of applications after steel materials. Compared with steel materials, the main advantages of aluminum are light weight and corrosion resistance. Although aluminum is not "never rusty", its corrosion resistance or weather resistance in normal atmospheric environments is indeed much better than steel. Since aluminum is a passivation type metal, there is always a layer of passive oxide film with good adhesion on the surface, thereby protecting the metal aluminum from being easily corroded. Aluminum and aluminum alloys have many obvious advantages as engineering materials, such as good heat transfer and electrical conductivity, strong impact absorption and light reflectivity. Aluminum and aluminum alloys also have excellent processing formability and weldability, so they can be easily processed into tubes, plates, foils, bars and profiles of various shapes and sizes. They have been widely used in many industrial fields and Civilian field.
In order to expand the application range of aluminum, especially when used as a decorative material, a high-gloss surface or a surface with a special texture is required. Therefore, surface treatment such as mechanical polishing, sweeping, chemical polishing, and electrochemical polishing is essential. The surface coating of organic polymers has been used more and more widely in terms of increasing the diversification of aluminum surface colors and extending the service life in harsh environments.
Through special surface treatment technology, giving the functional surface of aluminum alloy parts is a new trend in aluminum surface treatment, which greatly expands the application field of aluminum.
The surface treatment of aluminum can not only improve and enhance the chemical properties, corrosion resistance, abrasion resistance, etc., thereby extending the service life, but also obtain a beautiful colorful and multi-color appearance, broaden and enhance the decorative performance, and can give new physical Performance to obtain a variety of new functional materials and devices. Therefore, as a technical measure, the surface treatment of aluminum is not only an icing on the cake, but also an indispensable part of the aluminum alloy from raw materials to various practical applications of parts, components, and devices.
