Principle, method and application of aluminum alloy alkaline degreasing technology

Views:506 Author:Site Editor Publish Time:2023-04-14 08:35:49 Orgin:Site

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Aluminum alloy alkaline degreasing technology is a very important surface treatment technology, which is mainly used in industrial manufacturing, aerospace, automobile manufacturing and other industries. Its main function is to make the surface of the material smoother and cleaner by removing grease and impurities on the surface of the aluminum alloy for subsequent processing. This article will introduce the principle, method and application of aluminum alloy alkaline degreasing technology in detail.

principle

During the production process of aluminum alloy, due to the surface contact with air, it is easily oxidized by oxygen to form an oxide film, which will adversely affect the process and performance in the subsequent processing. Therefore, before processing aluminum alloys, the surface must be cleaned to remove grease and other impurities.

Alkaline degreasing technology for aluminum alloy is to use hydroxide ions (OH-) in alkaline solution to combine with fatty acids in organic substances such as oils and fats to form soap and oil, dissolve them, and then wash with water to remove aluminum Dirt on the surface of the alloy, so as to achieve the effect of cleaning. It is highly environmentally friendly, and at the same time has its own cleaning, bleaching, and sterilization effects, which can greatly reduce cleaning costs.

method

Aluminum alloy alkaline degreasing technology can use wet cleaning and dry cleaning two methods, as follows:

wet cleaning

Prepare the solution: add deionized water and alkaline cleaning agent at a certain ratio so that the pH value is maintained between 10~12.

Pretreatment of aluminum: first soak the aluminum alloy in the cleaning agent to completely cover the surface to dissolve grease and organic matter.

Drying: After the aluminum parts are soaked in the cleaning agent, they need to be dried at room temperature; at the same time, during the soaking process, the aluminum ions mixed in the water may produce a heating reaction in the water. If it reaches 70 degrees or more, it needs to be cooled. water or lower temperature

Another stage starts: After the drying process, the aluminum parts enter the next processing stage, including washing, rinsing and drying.

dry cleaning

Polishing the surface of aluminum alloy with powder cleaning agent can remove the scale and impurities on the surface.

Use jet pollution source with pressurized air spray gun to remove surface grease and impurities.

Using high-pressure hot gas cleaning, by spraying high-temperature clean gas, the surface pollutants are quickly oxidized and decomposed, so as to achieve the purpose of removing surface pollution.

application

Aluminum alloy alkaline degreasing technology is mainly used in the surface treatment of various aluminum alloy products, such as aluminum doors and windows, aluminum profiles, aluminum electrolytic capacitor shells, etc. By adopting this technology, the surface of the aluminum alloy can be treated more perfectly, and another treatment effect and protection for the aluminum alloy can be effectively enhanced, so that the service life and performance of the product are longer and more durable.

In general, the aluminum alloy alkaline degreasing technology can not only effectively clean the aluminum alloy surface, but also has great advantages in terms of safety and environmental protection. Through different methods, the effect of cleaning the aluminum alloy can be achieved in different environments, which is more convenient for the processing and manufacture of the aluminum alloy, and is also conducive to protecting the environment.