Aluminum alloy forgings have been widely used in many fields such as aerospace, automobile, energy and so on because of their good lightweight and high strength characteristics. However, the corrosion resistance of aluminum alloy forgings is often one of the key indicators of its application. Therefore, improving the corrosion resistance of aluminum alloy forgings by surface treatment technology has important practical significance. The surface treatment technology of aluminum alloy forgings and its influence on corrosion resistance are discussed in this paper.
The surface treatment technology of aluminum alloy forgings mainly includes anodizing, electroplating, spraying and so on. Among them, anodizing is a common surface treatment technology, which can significantly improve the corrosion resistance of aluminum alloy by forming a dense oxide film on the surface. Electroplating technology can deposit a layer of other metals or alloys on the surface of aluminum alloys, thereby changing the electrochemical properties of the surface and improving corrosion resistance. Spraying technology is to protect the surface of the aluminum alloy by spraying a layer of corrosion-resistant paint.
Surface treatment technology can significantly affect the corrosion resistance of aluminum alloy forgings. Through anodic oxidation treatment, the oxide film formed on the surface of aluminum alloy has high hardness and wear resistance, which can effectively prevent the intrusion of corrosive media. Electroplating treatment can regulate the electrochemical properties of aluminum alloy surface by selecting appropriate coating materials and process parameters, and further improve its corrosion resistance. Spraying treatment can isolate the contact between aluminum alloy and corrosive medium, and play a role in protecting the surface.
Although surface treatment technology can improve the corrosion resistance of aluminum alloy forgings, it still faces some challenges and problems. In the future, the following aspects are worthy of further study:
New surface treatment technology: Explore new surface treatment technology, such as micro-arc oxidation, plasma treatment, etc., to further improve the corrosion resistance of aluminum alloy forgings.
Composite treatment technology: a variety of surface treatment technologies are combined to form a composite treatment layer to improve the corrosion resistance and comprehensive performance of aluminum alloy forgings.
Environmental protection and sustainable development: Develop environmentally friendly surface treatment technology, reduce pollution emissions in the treatment process, and promote the sustainable development of aluminum alloy forging surface treatment technology.
Evaluation and prediction of corrosion resistance: Establish an accurate evaluation method and prediction model of corrosion resistance to guide the selection and optimization of surface treatment technology for aluminum alloy forgings.
The corrosion resistance of aluminum alloy forgings is the key index of its application, and surface treatment technology is an effective means to improve its corrosion resistance. The corrosion resistance of aluminum alloy forgings can be significantly improved by surface treatment techniques such as anodizing, electroplating and spraying. In the future, it is necessary to continue to explore new surface treatment technologies, combine a variety of treatment technologies, and pay attention to environmental protection and sustainable development to achieve a wider application of aluminum alloy forgings in various fields.
