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Impressed current cathodic protection (ICCP) is an electrochemical process used to prevent corrosion in metal structures by applying a controlled electrical current to the metal.
Impressed current systems utilize a rectifier to generate larger potential differences that drive current off of the anode so it flows to the protected structure. The benefits of these powered, impressed current cathodic protection systems (ICCP) include: Longer lasting anodes. Higher current systems.
An impressed current cathodic protection system (ICCP) for a pipeline consists of a DC power source, often an AC powered transformer rectifier and an anode, or array of anodes buried in the ground (the anode groundbed).
The primary advantage of impressed current cathodic protection systems over sacrificial anode cathodic protection systems is that the driving potential of the impressed current systems is not limited by the corrosion potential of an active metal.
Impressed Current Cathodic Protection Systems (ICCP) on ships is a long-term solution to corrosion problems and regarded as a superior alternative to sacrificial anode systems. Find out about the construction and working on ICCP in the article inside.
An impressed current cathodic protection controls the corrosion of a metal surface by making it the cathode of an electrochemical cell. The method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode.
There are two types of cathodic protection: galvanic anode and impressed current cathodic protection. Both provide a cathodic protection current flow from cathodic protection anodes placed within the same electrolyte as the metal to be protected.
This paper reviews the history of the development of impressed current cathodic protection of atmospherically exposed reinforced concrete from the first trials in 1959 on bridges to recently installed systems on a wide range of structures around the world.
Cathodic protection is a popular protection method for preventing corrosion in pipelines, offshore oil platforms and other steel structures. However, to be implemented effectively, it is crucial to understand the basic principles of bimetallic/galvanic corrosion.
Part 1. Corrosion Chemistry. Corrosion and its Definition. The Corrosion Process and Afecting Factors. Corrosion Types Based on Mechanism.