Cathodic protection systems prevent metal corrosion by making a metal object or structure the cathode in an electrochemical cell. Corrosion of the cathode is prevented by connecting it to a sacrificial metal anode, which corrodes instead. Such systems are commonly used to protect buried or immersed steel structures such as tanks, pipelines, or oil & gas infrastructure. Cables used to connect cathodic protection systems can be armoured or unarmoured depending on the risk of mechanical stress, sheathed with either PVC for standard applications or HMWPE where exposure to chemicals is anticipated.
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