Corrosion of buried pipelines in the urban sewage treatment project is mainly soil erosion, which is characterized by scattered piping, soil conditions are very complex, so the corrosion mechanism is very complex.
Corrosion of buried pipelines in the urban sewage treatment project is mainly soil erosion, which is characterized by scattered piping, soil conditions are very complex, so the corrosion mechanism is very complex.
Soil erosion and soil in the salt, water, oxygen and the electrochemical corrosion of coating steel pipe composition, microbial erosion. As the urban underground electrical facilities, cable is more dense, stray current corrosion is more serious, even through the pipeline near the plant may be acid or alkaline media of chemical corrosion.
Buried pipelines often pass through the city roads, buildings, rivers, etc., under pressure complicated. In addition, the carbon steel pipe may be buried by rock backfill sand during the collision and extrusion damage.
The event of buried pipeline inspection and repair corrosion damage is not easy to make corrosion worse. Often result in the repair environmental damage. Because of this, and the corrosion of buried pipeline design life of the general requirements in 20 ~ 30a above.
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