Pipe passivation is a method of improving the resistance of pipelines to chemical corrosion and oxidation through surface treatment technology. Passivation treatment uses coating or electrochemical methods to form a stable, dense, and difficult-to-corrode oxide layer on the surface of the pipeline, thereby protecting the surface of the pipeline from damage.

The core mechanism of pipeline passivation is to prevent further corrosion of the metal by forming a protective oxide layer on the metal surface. This oxide layer can isolate the metal from contact with the external environment, especially when in contact with water, and prevent oxidation and corrosion from occurring. In the surface treatment of steel pipes, electrochemical passivation is generally used, that is, an oxide layer is coated on the surface of the pipe to resist erosion by chemicals such as acids and alkalis.

Pipe passivation has very important applications in industrial manufacturing, construction engineering and other fields. In the field of industrial manufacturing, pipeline passivation can increase the service life of pipelines, reduce equipment failure rates caused by pipeline damage, and reduce production costs. For example, oil and gas transmission pipelines can maintain their service life for decades after passivation treatment, greatly reducing maintenance costs. In the field of construction engineering, pipeline passivation can protect pipelines from being corroded by scale and rust, thereby greatly extending the service life of pipelines and reducing the number of repairs and costs.