Key words: internal corrosion, galvanic anode protection, pipeline, electrically-insulating joints.
The paper presents performance characteristics of electrically-insulating joints in the cathodic protection systems of pipelines based on the results of bench testing. It has been offered to use efficiency coefficient of electrically-insulating properties characterizing the amount of protective current that remains once electrically-insulating joints have been installed as the main characteristic of an electrically-insulating joint. It has been shown that the more reliable protection of the pipeline, the more stray current flows through the electrically-insulating joint, i.e. the same electrically-insulating structure would be characterized by different efficiency coefficients (resistance to corrosion) in different cathodic protection systems.
References
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