How To Deal with The Oxidation And Blackening of Carbon Steel Pipe?

After sandblasting the carbon steel pipe, a layer of fine lines and holes will be left, and the oxidation rate of the pipe surface will accelerate. Especially in a high humidity environment, the oxidation rate of the pipe surface is faster, which eventually causes the pipe surface to turn black. This situation is also common in products such as mild steel pipe. Therefore, after sandblasting the carbon steel pipe, it is necessary to do a good job of protection and protection to prevent the oxidation of the pipe surface.

How to prevent carbon steel pipe oxidation?

1. Spraying anti-corrosion paint

Before sandblasting the carbon steel pipe, a layer of anti-rust primer suitable for the pipe material can be sprayed in advance to avoid oxidation of the pipe surface. After sandblasting, apply another layer of anti-corrosion paint to prevent further oxidation of the pipe surface.

2. Clean the pipe surface regularly

Regularly cleaning the pipe surface is an effective measure to prevent pipe oxidation. Dust and corrosive substances on the surface of carbon steel pipes easily absorb moisture and accelerate pipe oxidation. Regular cleaning of the pipe surface can remove these impurities, slow down the oxidation rate of the pipe, and extend the service life of the pipe.

3. Add a protective layer

Adding an anti-oxidation protective layer on the surface of the carbon steel pipe is also an effective method. Commonly used protective layers include spraying and electrophoresis. These protective layers are anti-oxidation, wear-resistant, and corrosion-resistant, greatly extending the service life of the carbon steel pipe.

How to deal with carbon steel pipes after oxidation and blackening?

1. Spray paint treatment

If the surface of the carbon steel pipe has been oxidized and blackened, you can use spray paint to repair it. The pipe surface needs to be cleaned and then sprayed with paint similar to the color of the pipe to cover it.

2. Mechanical treatment

If the aesthetics of the pipe is very high after spraying and does not meet the requirements, mechanical treatment can also be used. Mechanical grinding can completely remove the oxidized part of the carbon steel pipe surface, so that the pipe surface is completely repaired. The surface of the pipe after grinding needs to be repainted for protection. This method is widely used in the surface treatment of high-requirement products such as seamless steel pipe.

Summary

Carbon steel pipes are prone to oxidation and blackening after sandblasting. In order to avoid this situation, it is necessary to strengthen the protection and protection of the pipe surface. Spraying anti-corrosion paint, regularly cleaning the pipe surface, and adding a protective layer are effective measures to prevent pipe oxidation. If the pipe surface has oxidized and turned black, you can spray paint and mechanically treat it to restore the beauty and durability of the pipe surface. Maintaining the pipe is essential to extending its service life.

Read more: Roughness of carbon steel pipe