Research on corrosion resistance optimization strategy of zinc alloy die-casting hardware bag accessories
Release Time : 2024-12-30
In daily use, zinc alloy die-casting hardware bag accessories are often exposed to air, moisture and various chemicals, so their corrosion resistance becomes a key factor in determining the service life and quality of the product.
First of all, the optimization of alloy composition is the basis. By reasonably adjusting the proportion of alloy elements in zinc alloy, such as increasing the content of elements such as aluminum and magnesium, a denser and more stable oxide film can be formed on the surface of the alloy. This oxide film can effectively block the invasion of external corrosive media, thereby improving corrosion resistance. For example, an appropriate amount of aluminum can form a strengthening phase with zinc, refine the grain structure, enhance the overall corrosion resistance of the alloy, and provide better basic conditions for subsequent surface treatment.
Surface treatment technology plays a vital role. Electroplating technology, such as zinc plating and chrome plating, can form a protective coating on the surface of accessories. The zinc plating layer can protect the base zinc alloy by corroding itself preferentially through sacrificial anode; the chrome plating layer has good hardness and corrosion resistance, and can effectively resist friction and chemical erosion. In addition, chemical conversion film treatment is also an effective method, such as phosphating treatment and passivation treatment, which can enhance its corrosion resistance by generating an insoluble protective film on the surface, and improve the adhesion of the coating, providing a good base for further coating or other protective treatments.
The application of coating technology can further improve corrosion resistance. Use organic coatings, such as epoxy resin coatings, polyurethane coatings, etc. These coatings have good insulation properties and can prevent corrosive substances such as moisture, oxygen and salt from contacting the surface of zinc alloys. At the same time, by adding functional ingredients such as rust-proof pigments and corrosion inhibitors, the protective effect of the coating can be significantly enhanced, the service life of accessories in complex environments can be extended, and the needs of different bag usage scenarios can be met, from daily carrying to outdoor travel. Effective protection can be provided in various situations.
In the production process, the control of die-casting process parameters cannot be ignored. Ensuring that parameters such as temperature, pressure and speed in the die-casting process are stable and appropriate can reduce internal defects such as pores and shrinkage, which will reduce the density of the alloy and increase the starting point of corrosion. By optimizing the die-casting process, zinc alloy die-casting parts with uniform and dense structure can be obtained, and their own corrosion resistance can be improved, so that the accessories can maintain stable performance during long-term use and reduce the risk of damage and failure caused by corrosion.
Pay attention to the packaging and storage links as well. After the accessories are produced, moisture-proof and anti-oxidation packaging materials such as vacuum packaging and desiccant packaging should be used to avoid early corrosion due to moisture or contact with corrosive gases during storage and transportation. At the same time, control the temperature and humidity of the storage environment, keep the environment clean, prevent dust, salt and other impurities from adhering to the surface of the accessories, provide them with good storage conditions, ensure that they maintain a good initial state before being put into use, maximize their corrosion resistance advantages, and improve the overall quality and market competitiveness of zinc alloy die-casting hardware bag accessories, so as to meet consumers' demand for high-quality and durable bag accessories.