Corrosion Potential

Last Updated: December 21, 2018

Definition - What does Corrosion Potential mean?

Corrosion potential is the potential at which the rate of cathodic reactions and the rate of anodic dissolution of the electrode equalize resulting in zero current flow in the electrode. Corrosion potential gives an indication of the state of the corroding metal. Corrosion in pipelines is a major issue that leads to contamination of water in potable water lines, causes damage to pipelines resulting in leakage of harmful fluids to the surrounding pipelines and may even cause failure of pipeline if left unchecked.

Trenchless rehabilitation techniques such as cured-in-place pipe (CIPP), mechanical spot repair and sliplining can be used to rehabilitate pipelines affected by corrosion.

Trenchlesspedia explains Corrosion Potential

Pipelines that are unprotected, whether buried, exposed to the atmosphere or submerged can be attacked by corrosion. Corrosion weakens a pipelines structural integrity and makes it prone to failure. Since pipelines carry a variety of fluids, in some instances hazardous fluid, it is necessary to carry out maintenance checks and repairs periodically. When a metal is exposed to a corrosive environment, cathode and anode are formed spontaneously in the presence of an electrolyte.

To prevent the metal surface from interacting with potential electrolytes in its environment, corrosion control methods such as cathodic protection, protective coatings, corrosion inhibitors and appropriate selection of pipe material can be used.

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