How To Do Anti-Corrosion In Steel Pipe? Anti-Corrosion Work Construction Methods And Construction Process Details

How to do anti-corrosion in steel pipe?

Steel pipe anti-corrosion is an important anti-corrosion measures, can effectively extend the service life of the steel pipe, improve the safety and economy of the pipeline.

First, the causes and hazards of steel pipe corrosion: steel pipe is widely used in the field of underground pipeline, petrochemical, urban water supply, etc. However, due to the environment, media and other factors, steel pipe is prone to corrosion. Steel pipe corrosion will not only reduce the service life of the pipe, but also cause harm to the surrounding environment and human body. For example, corrosion of underground pipelines may lead to leaks, explosions and other accidents, affecting the safety of surrounding buildings and residents. Therefore, the internal corrosion protection of steel pipe is crucial.

Second, the method of steel pipe internal anti-corrosion

Coating anti-corrosion coating anti-corrosion is a common method of internal anti-corrosion. By coating a layer of anti-corrosion coating on the inner wall of the steel pipe, a dense protective film is formed to prevent the penetration of corrosive media. Commonly used coatings are epoxy resin, polyurethane, acrylic resin and so on. The advantages of this method are simple construction, low cost, the disadvantage is easy to aging, maintenance difficulties.

Hot dip galvanizing hot dip galvanizing is a method of achieving corrosion resistance by immersing the steel pipe in molten zinc liquid, so that the surface of the steel pipe forms a dense layer of zinc. The advantage of this method is strong corrosion resistance and long life, the disadvantage is easy to produce zinc tumors, maintenance difficulties.

Cathodic protection cathodic protection is through the application of electric current to make the steel pipe become a cathode, so as to inhibit the corrosion of the method. Commonly used cathodic protection methods are applied current method and sacrificial anode method. The advantage of this method is that the effect is good, the scope of application is wide, the disadvantage is that regular maintenance, high cost.

Lining anticorrosion lining anticorrosion is lined with a layer of corrosion-resistant materials, such as polyethylene, glass fiber reinforced plastic, etc., in order to achieve the purpose of anticorrosion method. The advantage of this method is strong corrosion resistance, long life, the disadvantage is that the construction is difficult, high cost.

Third, the construction process of steel pipe internal anti-corrosion

Pre-construction preparation before construction, the steel pipe needs to be cleaned, descaling and other preparatory work to ensure the adhesion of the coating to the surface of the steel pipe. At the same time, it is also necessary to check whether the construction environment and equipment meet the requirements.

Coating according to the design requirements, the coating will be mixed according to a certain proportion, and then coated on the inner wall of the steel pipe. The coating process needs to pay attention to the thickness of the coating, uniformity and other indicators to ensure the anti-corrosion effect.

Hot dip galvanizing puts the steel pipe into a pool of zinc liquid and impregnates it for a certain period of time to form a zinc layer on the surface of the steel pipe. In the process of hot dip galvanizing, attention needs to be paid to controlling the temperature and composition of the zinc liquid and other indicators to ensure the thickness and quality of the zinc layer.

Cathodic protection For steel pipes that need to be protected by cathodic protection, cathodic protection equipment needs to be installed according to the design requirements. In the construction process, it is necessary to pay attention to the installation position of the equipment, wiring and other indicators to ensure the protection effect.

Lining anti-corrosion for the need to use lining anti-corrosion steel pipe, according to the design requirements need to choose the appropriate lining materials, and lining construction. In the construction process need to pay attention to control the thickness of the lining material, uniformity and other indicators to ensure that the anti-corrosion effect.

Fourth, the precautions of anti-corrosion steel pipe

In the construction process, you need to pay attention to the implementation of safety measures, such as wearing protective equipment, regularly check the safety of the construction site.

Before coating, the surface of the steel pipe needs to be strictly descaled to ensure the adhesion of the coating to the surface of the steel pipe.

In the process of hot dip galvanizing, attention needs to be paid to controlling the temperature and composition of the zinc solution to ensure the thickness and quality of the zinc layer.

In the process of cathodic protection, attention needs to be paid to the regular inspection of the operating conditions of the protection equipment and current density and other indicators to ensure the protection effect.

In the process of lining anticorrosion, it is necessary to pay attention to controlling the thickness of lining materials and uniformity and other indicators to ensure the effect of anticorrosion.