In the pipeline system, the definit

In the pipeline system, the definition of corrosion is based on the specific pipeline environment, the chemical reaction, electrochemical reaction and microbial erosion in all metal and non-metallic materials of pipeline system, which can lead to the damage and loss of pipeline structure and other materials. Pipeline corrosion can be understood as a kind of chemical reaction of steel pipe base material in its environment, which will cause the loss of pipeline materials and lead to the failure of pipeline components and even the whole pipeline system. In addition to the direct damage to materials caused by corrosion, the pipeline damage caused by corrosion products can also be regarded as corrosion damage. Whether the pipeline corrosion will spread or not and how large the diffusion range is mainly depends on the Erosive Force of the corrosive medium and the corrosion resistance of the existing pipeline materials. Temperature, concentration of corrosive medium and stress condition will affect the degree of pipeline corrosion