Abstract: Copper alloy forgings play an important role in various industrial applications, but their service life is affected by many factors. This paper discusses the possibility of extending the service life of copper alloy forgings by surface treatment technology, and introduces the existing surface treatment methods and the future research direction.
Copper alloy forgings are widely used in many fields because of their excellent mechanical properties and electrical conductivity. However, in complex working environment and use conditions, the surface of copper alloy forgings often appear oxidation, corrosion, wear and other problems, resulting in reduced performance and shortened service life. Therefore, exploring the surface treatment technology suitable for copper alloy forgings to improve its corrosion resistance and durability is of great significance for extending its service life.
Surface treatment technology available
Chemical treatment: Through chemical methods, a dense oxide film or passivation film is formed on the surface of copper alloy forgings to isolate air and water and reduce corrosion reactions. Common chemical treatment methods include pickling, passivation and so on.
Electroplating treatment: Depositing a layer of other metals or alloys on the surface of copper alloy forgings by electroplating technology to increase its corrosion resistance and wear resistance. Common electrocoatings include zinc, nickel, chromium and so on.
Heat treatment: Through high temperature treatment, change the microstructure and chemical composition of the surface of copper alloy forgings to improve its hardness and oxidation resistance. For example, heat treatment processes such as quenching and tempering can effectively improve the surface properties of copper alloy forgings.
Future research direction
Composite surface treatment technology: combined with a variety of surface treatment methods, the formation of composite coating or multi-layer structure to comprehensively improve the corrosion resistance, wear resistance and oxidation resistance of copper alloy forgings. For example, chemical treatment can be performed before electroplating or heat treatment to obtain better surface properties.
Nano surface treatment technology: The use of nanotechnology on the surface of copper alloy forgings to prepare nanostructured coatings or modified layers. Nanostructures have high specific surface area and excellent physical and chemical properties, which can increase the hardness, wear resistance and corrosion resistance of the surface.
Environmental protection surface treatment technology: Traditional surface treatment methods often use a lot of chemicals and energy, causing some pollution to the environment. Therefore, the development of environmentally friendly surface treatment technology has become an important direction of future development. For example, water-based electroplating technology can be used instead of traditional organic solvents to reduce environmental pollution.
The service life of copper alloy forgings can be extended effectively by surface treatment technology. Existing treatment methods include chemical treatment, electroplating treatment and heat treatment, but there is still room for improvement. Future research directions include composite surface treatment technology, nano surface treatment technology and environmentally friendly surface treatment technology, so as to improve the corrosion resistance, wear resistance and oxidation resistance of copper alloy forgings and further extend their service life. These explorations will help promote the application and development of copper alloy forgings in various fields.
