Requirements of sewage pipe corrosion

Sewage pipes buried under the city's characteristics, pipeline coating should meet the following basic requirements:

① has good chemical resistance;

② good insulating properties and density, electrochemical, and to prevent stray current corrosion;

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The defect of buried pipeline

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 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.

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