Features of Electrochemical Protection at Long Operated Steel Underground Pipelines

Summary

The Center of Technical Diagnostics of Mosvodokanal operates the units protecting the water supply pipelines against electrochemical corrosion. In the process, the necessity for protection of old water supply networks operating without cathodic protection for a long time appears. For reasonability and possibility of introduction of electrochemical protection of the long operated underground steel water lines the criteria of assessment of their corrosion conditions have been elaborated. On the basis of the experience accumulated at the Center of Technical Diagnostics the analysis of basic peculiarities in the course of designing and operation of the plants for electrochemical protection of such pipelines has been made; basic propositions making it possible to improve the efficiency of counter-corrosion protection of pipes are presented.

Key words

water supply network , corrosion of pipelines , electrochemical protection , insulating coating , stray current