Necessity of anti-corrosion treatment:

Carbon steel pipe (CS pipe) is a kind of pipe widely used in construction engineering, water supply, natural gas, oil and other industries, but because the surface of carbon steel pipe is easy to rust, its service life and safety performance have certain hidden dangers. In order to reduce this hidden danger, carbon steel pipe must be treated with anti-corrosion. The purpose of anti-corrosion treatment is to form a protective layer with uniform thickness, strong bonding force and not easy to fall off on the surface of the pipe, so that the carbon steel pipe is isolated from the external environment, thereby playing the role of anti-corrosion, anti-oxidation and prolonging service life.

Carbon steel pipe anti-corrosion treatment method:

Carbon steel pipe anti-corrosion treatment methods include external coating anti-corrosion, internal coating anti-corrosion and hot dip galvanizing. The following will introduce them one by one.

1. External coating anti-corrosion
When carbon steel pipes are in a humid, corrosive environment for a long time, they are generally treated with external coating anti-corrosion. Common coatings for external coating anti-corrosion include epoxy coating, polyurethane coating, heat shrink tape, fiberglass covering, etc. Epoxy coating and polyurethane coating are widely used in room temperature environment, while heat shrink tape and fiberglass covering are mainly used in low temperature environment and occasions with high anti-corrosion requirements.

2. Internal coating anti-corrosion
Internal coating anti-corrosion is usually achieved by spraying or rolling a suitable anti-corrosion coating onto the inner surface of the carbon steel pipe to form a uniform, smooth, corrosion-resistant protective layer to extend the service life of the carbon steel pipe and prevent medium corrosion. The types of internal coating anti-corrosion coatings include epoxy coating, polyurethane coating, polyester glass cloth, PTFE, etc.

3. Hot-dip galvanizing
Hot-dip galvanizing refers to an anti-corrosion treatment method in which the carbon steel pipe is immersed in molten zinc liquid to coat the surface of the pipe with a layer of zinc. The advantages of hot-dip galvanizing are uniform coating thickness and bonding strength, good corrosion resistance, and can effectively prevent the failure of carbon steel pipes due to corrosion.

Notes:
When performing anti-corrosion treatment, the appropriate anti-corrosion coating and method should be selected according to the use environment and medium characteristics of the pipe. At the same time, before anti-corrosion treatment, the surface of the carbon steel pipe should be cleaned and treated to ensure that there are no impurities and pollutants on its surface, so as to maximize the anti-corrosion treatment effect. In addition, during use and transportation, care should be taken to avoid mechanical damage to the surface of the carbon steel pipe and to prevent corrosion and contamination of the medium inside and outside the pipe.

How long is the service life of a carbon steel pipe?

According to industry data and expert analysis, the service life of a carbon steel pipe under normal use conditions can usually reach 10 to 20 years. However, it is worth noting that this number is not absolute, and the actual service life will be affected by many factors such as pipe wall thickness, use environment, design and manufacturing process. Reasonable selection, installation and maintenance are equally important to extend its service life.