Pipeliners Dictionary

Cathodic protection is a method used to prevent corrosion in pipelines and other metal structures.

It works by applying a small electrical current to the metal surface, which counteracts the natural corrosion process and protects the metal from deterioration. This is done by creating an electrical potential difference between the pipeline metal and the surrounding soil or water, causing the current to flow from the pipeline to the soil or water, creating an electrically isolated protective layer on the metal surface.

There are two main types of cathodic protection for pipelines: impressed current cathodic protection (ICCP) and galvanic cathodic protection (GCP). ICCP uses an external power source to provide the electrical current, while GCP uses a sacrificial anode to generate the current. Both methods have their advantages and disadvantages, and the choice of which to use depends on the specific requirements of the pipeline and the environment in which it is located.

Cathodic protection is a critical aspect of pipeline maintenance and operation, as corrosion can cause serious problems, such as leaks, reduced flow capacity, and even pipeline failure. Regular monitoring and testing of cathodic protection systems are essential to ensure that the system is functioning properly and providing the desired level of protection.

Additionally, cathodic protection systems must be designed and installed in accordance with industry standards and regulations to ensure their effectiveness and safety. This includes ensuring that the proper materials, electrical current levels, and protective coatings are used, and that the system is properly maintained and tested over time.

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