How to extend the service life of zinc alloy die-casting hardware bag accessories by anti-oxidation treatment technology (electroplating, spraying)?
Release Time : 2025-04-23
Zinc alloy die-casting hardware bag accessories are easily affected by oxidation in daily use, which reduces their beauty and functionality. Electroplating and spraying are common anti-oxidation treatment technologies that can effectively extend the service life of accessories and improve their corrosion resistance and wear resistance.
Zinc alloy itself has certain chemical activity and is easy to react chemically with oxygen, moisture and other corrosive substances in the air to generate oxides. Especially in a humid environment, the oxidation rate will be accelerated. Hardware bag accessories will also be exposed to various pollutants during use, such as sweat, cosmetics, etc., which will also accelerate its oxidation process. The surface of the oxidized accessories will change color, rust, etc., which not only affects the appearance, but may also cause the performance of the accessories to deteriorate, such as unsmooth opening and closing, reduced strength, etc.
Electroplating is to deposit a layer of metal or alloy plating on the surface of zinc alloy by electrolysis. Common electroplating layers include chromium, nickel, copper, etc. These electroplating layers have good corrosion resistance and oxidation resistance, and can form a dense protective film on the surface of zinc alloy to prevent oxygen, moisture and other corrosive substances from contacting the zinc alloy matrix, thereby slowing down the occurrence of oxidation reactions. For example, the chrome plating layer has high hardness and glossiness, which can not only effectively prevent oxidation, but also improve the wear resistance and scratch resistance of accessories, so that accessories can maintain good appearance and performance in long-term use.
First of all, the pretreatment process before electroplating is very important. Through degreasing, rust removal and other treatments, the surface of the zinc alloy can be ensured to be clean and moderately rough, which is conducive to the firm adhesion of the electroplating layer. During the electroplating process, precise control of the composition, temperature, current density and other parameters of the electroplating solution can ensure the quality of the electroplating layer. High-quality electroplating layers have uniform thickness and fine crystals, which can better play their protective role. In addition, some electroplating processes will also perform passivation treatment after electroplating to further improve the corrosion resistance of the electroplating layer. The passivation film can form a more stable protective film on the surface of the electroplating layer and enhance its antioxidant ability.
Spraying is to spray the paint evenly on the surface of the zinc alloy to form a protective film. The film-forming substance in the paint can form a continuous coating on the surface of the accessory to isolate air, moisture and other corrosive substances. At the same time, the spray coating also has a certain degree of flexibility and wear resistance, can withstand a certain degree of deformation and friction, and is not prone to cracking and falling off. For example, some high-performance spray coatings have anti-rust pigments and antioxidants added to them, which can further improve the anti-oxidation performance of the coating.
Before spraying, the zinc alloy surface also needs to be pretreated to improve the adhesion of the coating. When spraying, the pressure, distance and angle of the spray gun should be controlled to ensure that the paint is evenly covered on the surface of the accessories. The thickness of the coating also needs to be adjusted according to the actual situation. Generally speaking, an appropriate increase in the thickness of the coating can improve its protective performance. In addition, some special spraying processes, such as powder spraying, have high environmental protection and coating quality, and can form a denser and stronger protective film, effectively extending the service life of accessories.
As common anti-oxidation treatment technologies for zinc alloy die-casting hardware bag accessories, electroplating and spraying prevent oxidation reactions from occurring by forming a protective film on the surface of accessories, thereby extending their service life. In practical applications, it is necessary to select appropriate processing technology based on factors such as the use environment and performance requirements of the accessories, and strictly control the processing process parameters to ensure a good anti-oxidation effect so that the hardware bag accessories can maintain their beauty and functionality in long-term use.