With the increasing scope and number of applications of aluminum casings, the surface anti-corrosion problem of aluminum casings has also received increasing attention from various industries. The research and development and improvement of aluminum surface anti-corrosion technology has become the focus of the aluminum casing processing industry. So what are the surface anti-corrosion technologies of aluminum enclosures? The following editors from Zhongyilong will introduce them to you.
The performance of aluminum is very active, and it is easy to form an oxide film on its surface, and it is difficult to perform electroless plating on its surface under normal conditions. Generally, nickel is plated on the surface of the aluminum first, and then other elements are plated. The two most widely used methods in the electroless nickel plating process are zinc immersion-pre-plating method and direct electroless nickel plating.
The disadvantage of the zinc immersion-pre-coating method is that it is easy to cause the nickel layer to peel off in a humid corrosive environment, and there is a nitric acid zinc stripping procedure between two zinc dippings, which will pollute the production environment, so the development of this process is subject to certain restrictions.
Electroless plating is a new type of metal surface technology. The technical process is simple, energy-saving and environmentally friendly. It has a wide range of applications and a uniform coating. In terms of protective performance, it can improve the corrosion resistance and service life of the product, and in terms of functionality, it can improve the wear and lubricity of the workpiece, which has become the development trend of surface treatment technology.
Thermal spraying technology can spray most solid materials such as various metal s and non-metals, so it can be made into functional coatings with various properties, and the construction is flexible and adaptable. Thermal spraying is a more mature and effective surface treatment method. The advantages of thermal spraying process are: light equipment, flexible process, less operation process, short processing time, quick repair, and controllable coating thickness.
The corrosion resistance of aluminum is not strong, and it is easy to be stained. Therefore, the aluminum enclosure is usually subjected to special oxidation treatment to obtain enclosure parts with good properties such as corrosion resistance and wear resistance.
In anodizing method, the anode is made of aluminum products in the electrolyte, and the cathode is made of aluminum plate. The process of forming an oxide film on the surface of the product after electrification. After anodization, an oxide film with a thickness of several micrometers to several hundreds of micrometers can be formed on the surface of aluminum .
The chemical oxidation method produces a porous oxide film with good adsorption on the surface through chemical reaction, which can be used as the bottom layer of the organic coating. The characteristics of the chemical oxidation method are: easy operation, simple equipment, low cost and high efficiency, and it is applied to aluminum casings and aluminum product parts that are not suitable for electrochemical treatment.
Micro-arc oxidation method is a new type of aluminum surface ceramization technology developed on the basis of anodizing method. This technology uses a high-energy-density micro-plasma arc, and the film and hardness formed after oxidation are greatly improved, and the process is simple, high production efficiency, low pollution, and strong processing capacity. It is a promising new surface treatment technology.
Laser surface cladding technology is a surface strengthening method that rapidly heats and melts or ceramic powder and the surface of the substrate under the action of a high-energy beam, and cools naturally after the beam is removed. The advantages of the method are high economic benefit, cost reduction and efficiency improvement, and material saving.
The surface anti-corrosion treatment enclosure greatly improves the performance of aluminum enclosure parts. In order to further meet the requirements of anti-corrosion, it is necessary to spray paint on the surface. As environmental protection requirements become higher and higher, people's awareness of environmental protection is increasing, and coatings used for surface anti-corrosion are developing in the direction of no pollution or low pollution. With the development of various aluminum products manufacturing processes, coatings with anti-corrosion function are increasingly playing a pivotal role in saving, environmental protection, and anti-corrosion.
The above anti-corrosion technology of aluminum enclosure surface is shared here. Aluminum enclosure materials need to withstand relatively harsh working conditions and environments in use, so they must have better functional characteristics. Therefore, it is necessary to further study the aluminum surface treatment process, so that the advantages of the aluminum enclosure material can be greatly exerted.
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