Polyurethane sieve plate factory teaches you how to deal with the blackening of aluminum punching plate

Recently, a customer can ask me, aluminum punching plate is not we will not rust, how his hands of aluminum punching plate black? In fact, this is not rust, because aluminum plate will not rust, so what's the matter with blackening? One of the reasons is that there is an oxide film on the surface. So, how to make the aluminum plate black?
This paper analyzes the causes of obvious blackening of aluminum plate punching mesh? Aluminum punching net is made of aluminum plates of different thickness and types. So, how to learn to become a black after the aluminum plate punching net is manufactured? The blackening degree of the aluminum plate punching net depends on the physical properties of the aluminum plate. The old oxide film formed by the reaction of aluminum plate and oxygen is dark black. The oxide film has no direct impact on the service quality of products. However, punching mesh is used in many different occasions in China. Beauty is necessary.
The punching mesh plate of aluminum plate is bright when it is made, and it will appear blackening after a period of use, which is determined by the physical properties of aluminum plate. The old oxide film produced by the reaction of aluminum plate with oxygen turns black. In fact, the oxide film itself has no effect on the quality of perforated mesh plate products, but for some occasions with strict requirements, the beauty of perforated mesh plate is very important, and the requirements will be more strict, so senchi Bianxiao will tell you how to remove the black oxide film.
1. Remove an oxide film. There is a fine oxide film on the surface of aluminum, which is old and needs to be removed. The method is to soak in a strong alkaline solution (such as 40% sodium hydroxide solution) at 40 ℃ for about 30 minutes. After removing an oxide film, take out the aluminum part for water washing.
2. Electrolytes. The aim is to make a new kind of loose oxide film. Using 20% dilute sulfuric acid as electrolyte, the aluminum parts are connected to the cathode and electrolyzed by 12v-15v DC for about one hour. After washing.
3. Coloring. The electrolytic aluminum can be dyed by putting it into the dye. The color of the dye is determined from all aspects, and even Chinese ink technology can. 4. Curing. Since there is no special curing agent, we can immerse the colored aluminum parts in festive water for 20 minutes to complete the process.
After such an operating system, the blackened oxide film will be removed and become like a new one.
Polyurethane sieve plate factory teaches you how to deal with the blackening of aluminum punching plate
Blackening treatment of aluminum stamping screen: the old oxide film is black. To remove it, immerse it in a strong alkaline solution for 30 minutes, remove a black oxide film, and then we clean the aluminum sheet. The aluminum plate was connected to the cathode and electrolyzed with 20% thin sulfuric acid for 12 hours at 12v-15v DC. Wash after completion.
It can also directly cover the oxide film and the punching mesh surface of the electrostatic spraying aluminum plate, and the color can be selected. Light mechanical punching net refers to the hole pattern of less than 0.5-2 mm from the small hole, and the thickness of the plate is not more than 3 mm. Heavy punching net refers to the thickness of the punching plate is less than 8 mm, and the aperture is less than 20 mm. Heavy punching net refers to the thickness of the punching plate is more than 8 mm, and the aperture is less than 200 mm.
What are the methods to remove the black oxide film
1. Wash after completion.
2. The old oxide film is black. To remove it, soak it in strong alkali solution for 30 minutes, remove the black oxide film, and then wash the aluminum plate.
3. This layer of oxide film can also be directly covered by electrostatic spraying on the surface of punching mesh plate of aluminum plate. We can choose any color, which is not only beautiful, but also economical and durable, with long service life.
What are the uses of aluminum plate punching mesh plate
Aluminum plate punching net can be used for ceiling, sound-absorbing material wallboard, stairs, balconies, environment-friendly tables and chairs, etc.