What is steel pipe anti-corrosion? Why do we need to do steel pipe anti-corrosion?

Steel pipe anti-corrosion is a series of measures taken to prevent steel pipes from being corroded during use. If steel pipes are not treated with anti-corrosion, they are prone to corrosion. Corrosion will make the wall thickness of steel pipes thinner, reduce their strength and bearing capacity, and may cause problems such as rupture and leakage during use of steel pipes, affecting their normal use functions.

For example, in pipelines that transport media such as oil and gas, once the steel pipe is corroded and perforated, it will not only cause medium leakage, but may also cause safety accidents and environmental pollution.

2. What are the common steel pipe anti-corrosion methods?

Anti-corrosion methods

1. Coating anti-corrosion:

– Use coatings to form a protective film on the surface of the steel pipe to prevent the corrosive medium from contacting the steel pipe. Commonly used coatings include epoxy coatings, polyurethane coatings, etc.

– This method is easy to construct and relatively low in cost. It is suitable for steel pipe anti-corrosion under various environmental conditions.

2. Cathodic protection: – By applying cathodic current to the steel pipe, the steel pipe becomes a cathode, thereby inhibiting the occurrence of corrosion.

– Cathodic protection is usually used in combination with coating anti-corrosion, which can effectively improve the anti-corrosion performance of steel pipes.

3. Anti-corrosion with corrosion inhibitors:

– Add corrosion inhibitors to the transported medium to slow down the corrosion rate of the steel pipe.

– The selection of corrosion inhibitors needs to be based on the properties of the transported medium and the conditions of use.

3. What are the uses of steel pipe anti-corrosion?

Steel pipe anti-corrosion is essential to ensure the safe and reliable operation of the project. In the petroleum, chemical, natural gas and other industries, the anti-corrosion performance of steel pipes is directly related to the safety and efficiency of production. At the same time, good anti-corrosion measures can also extend the service life of steel pipes and reduce maintenance costs.

1) Ensure the safe operation of the pipeline system

1. Prevent leakage: Steel pipes that have been treated with anti-corrosion can effectively resist corrosion and reduce the probability of thinning and perforation of the pipe wall caused by corrosion, thereby avoiding leakage of the transported medium. For example, in oil and gas pipelines, once a leak occurs, it will not only cause a waste of resources, but may also cause serious safety accidents such as explosions and fires.

2. Maintain structural integrity: Anti-corrosion measures can maintain the strength and rigidity of steel pipes, ensuring that the pipeline will not easily deform or rupture when subjected to internal pressure and external loads. This is especially important for long-distance transmission pipelines and pipelines laid under complex geological conditions.

2) Extend the service life of steel pipes

1. Reduce maintenance costs: Good anti-corrosion treatment can significantly extend the service life of steel pipes and reduce frequent repairs and replacements due to corrosion. This not only saves a lot of manpower, material and financial resources, but also reduces the impact on production and life.

2. Improve investment benefits: For large-scale engineering projects, anti-corrosion treatment of steel pipes can improve the investment benefits of the entire project. Although anti-corrosion treatment may increase certain costs in the early stage, in the long run, the overall cost will be greatly reduced due to reduced maintenance and replacement costs.

3) Adapt to different environmental applications

1. Harsh environments: In harsh environments such as oceans, deserts, and chemical parks, steel pipes face more serious corrosion threats. By adopting effective anti-corrosion methods, steel pipes can operate stably in these environments. For example, steel pipes on offshore platforms need to use a combination of heavy anti-corrosion coatings and cathodic protection to resist corrosion from seawater.

2. Special media transportation: When transporting highly corrosive media, such as acid, alkali, salt solution, etc., anti-corrosion treatment can ensure that the steel pipe will not be corroded by the medium, ensuring the safety and stability of transportation. At the same time, for industries such as food and medicine, anti-corrosion treatment can also ensure the purity of the transported medium and avoid pollution.