How to prevent surface oxidation of zinc alloy die-casting hardware bag accessories?
Release Time : 2025-06-12
Zinc alloy die-casting hardware bag accessories are popular for their beauty and practicality, but they are prone to surface oxidation, which affects their appearance and service life. To prevent oxidation, it is necessary to start from production process, surface treatment, daily use and other aspects to build a comprehensive protection system.
Strict quality control in the production process is the basis for preventing oxidation. In the die-casting process, it is crucial to ensure the purity of zinc alloy raw materials. Raw materials with high impurity content are more likely to cause oxidation reactions, so high-quality zinc alloy ingots should be selected to avoid oxidation hazards caused by impure raw materials. At the same time, the precise control of die-casting process parameters cannot be ignored. Appropriate die-casting temperature, pressure and time can make the internal structure of accessories dense and reduce defects such as pores and looseness. Because these defective parts are more likely to come into contact with air and moisture, they become the starting point of oxidation. Only by ensuring the quality of accessories from the source can we lay a good foundation for subsequent anti-oxidation treatment.
Surface treatment process is the key line of defense against oxidation. Electroplating is one of the common and effective ways. By plating a layer of other metals, such as nickel and chromium, on the surface of zinc alloy, a dense protective film can be formed to isolate the zinc alloy from the air. The electroplating layer can not only prevent oxidation, but also improve the wear resistance and aesthetics of the accessories. In addition to electroplating, spraying can also be used. Spraying a layer of anti-corrosion paint can evenly cover the surface of the accessories and play a good protective role. Different coatings have different characteristics. Some coatings have excellent weather resistance and are suitable for bag accessories for outdoor use; some coatings focus on decorativeness and can give accessories rich colors and textures. Choosing the right coating and spraying process can effectively enhance the antioxidant capacity of accessories.
Passivation treatment is also an important means to prevent oxidation. Passivation is to form an extremely thin passivation film on the surface of zinc alloy. Although this film is difficult to detect with the naked eye, it can significantly improve the corrosion resistance of the metal. During the passivation process, a specific chemical solution reacts with the surface of the zinc alloy to change the chemical properties of the metal surface and make it more stable. The passivation film not only prevents oxygen and moisture from contacting the zinc alloy, but also can self-repair to a certain extent. When the passivation film is slightly damaged, the film layer can automatically recover and continue to play a protective role under appropriate environmental conditions.
It is equally important to take correct protective measures during daily use and storage. When not in use, the bag should be stored in a dry and ventilated environment to avoid humid air that accelerates the oxidation of the accessories. If long-term storage is required, the bag can be placed in a dust bag and a desiccant can be placed in the bag to absorb excess moisture. During use, try to avoid contact between accessories and corrosive substances, such as perfume, cosmetics, sweat, etc. The chemical components contained in these substances may react with zinc alloys, destroy the protective layer on the surface, and induce oxidation. Once the surface of the accessory is stained with these substances, it should be wiped clean with a clean soft cloth in time.
Regular cleaning and maintenance of accessories helps maintain their antioxidant properties. When cleaning, use a mild detergent and soft cloth, and avoid using a rough brush or a detergent containing abrasive particles to avoid scratching the protective layer on the surface of the accessory. After cleaning, a thin layer of protective oil, such as sewing machine oil, mineral oil, etc., can be applied to the surface of the accessory. Protective oil can form a protective film on the surface of accessories, further isolating air and moisture, while also playing a lubricating role and reducing wear on the moving parts of accessories. However, the amount of oil applied should not be too much, so as not to absorb dust and affect the appearance.
For some zinc alloy die-casting hardware bag accessories with special designs or complex structures, anti-oxidation treatment needs to be more meticulous. For example, accessories with hollows, gaps or threads are easy to hide dirt and are more difficult to surface treat. During the production process, special processes may be required to ensure that these parts are also fully protected. In daily use, pay special attention to these parts when cleaning to ensure that no dirt remains. You can use cotton swabs, soft brushes and other tools to carefully clean the gaps and corners to prevent moisture and corrosive substances in the dirt from causing oxidation.
Preventing the surface oxidation of zinc alloy die-casting hardware bag accessories is a systematic project that requires attention from the source of production to every link of daily use. Only by strictly controlling the production quality, selecting the appropriate surface treatment process, and adopting the correct use and maintenance methods can the service life of accessories be effectively extended and their beauty and performance be maintained.