Automobile aluminum alloy forgings have been widely used in modern automobile manufacturing industry because of their light weight and high strength. However, the relatively active chemical properties of aluminum alloy make it more sensitive to corrosion environment. Therefore, the surface treatment and anti-corrosion technology of automobile aluminum alloy forgings are particularly important. This paper will focus on the surface treatment method and anti-corrosion technology of automobile aluminum alloy forgings.
Surface treatment of automobile aluminum alloy forgings
Cleaning treatment: Before any surface treatment, it is first necessary to thoroughly clean the aluminum alloy forgings to remove the grease, oxides and other impurities on the surface to ensure the effect of subsequent treatment steps.
Mechanical treatment: Through sandblasting, shot blasting and other mechanical methods, the surface of aluminum alloy forgings are coarsened to increase the surface area and improve the adhesion of the coating or coating.
Chemical treatment: Using chemical conversion film technology, a dense oxide film or chemical conversion film is formed on the surface of aluminum alloy forgings to improve its corrosion resistance and coating performance.
Anti-corrosion technology of automobile aluminum alloy forgings
Anodizing treatment: This is a method of protecting the substrate by forming a dense oxide film on the surface of the aluminum alloy. The aluminum alloy forgings after anodic oxidation have higher corrosion resistance, wear resistance and decoration.
Electrophoretic coating: Electrophoretic coating is a coating method in which paint particles are deposited on the surface of aluminum alloy by electrophoresis. This method can obtain a uniform, dense coating, providing good anti-corrosion protection.
Coating protection: Through electroplating, electroless plating and other methods, a layer of metal or non-metal coating is formed on the surface of aluminum alloy forgings to isolate the contact between the matrix and the corrosive medium to achieve the purpose of anti-corrosion.
When selecting surface treatment and anti-corrosion technology, it is necessary to consider factors such as the use environment, performance requirements and cost of automotive aluminum alloy forgings. In the future, with the improvement of environmental protection requirements and technological progress, more environmentally friendly and efficient surface treatment and anti-corrosion technology will be widely used, such as water-based coating electrophoretic coating, chromium-free chemical conversion treatment.
The surface treatment and anti-corrosion technology of automobile aluminum alloy forgings is an important link to ensure the quality and performance of automobiles. Through reasonable selection and application of surface treatment and anti-corrosion technology, the corrosion resistance and service life of automobile aluminum alloy forgings can be significantly improved, providing strong support for the development of the automobile industry. At the same time, the continuous promotion of research and development and innovation of relevant technologies will help achieve sustainable development of the automobile manufacturing industry.
