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CATHODIC PROTECTION What is cathodic vindication? cathodic shelterion is a method to reduce corrosion by minimizing the difference in effectiveness between anode and cathode. This is achieved by applying a current to the make to be protected ( such(prenominal) as a pipeline) from round international source. When enough current is applied, the whole organise result be at ane potential; thus, anode and cathode sites forget non exist. Cathodic apology is comm moreover roled on many types of coordinates, such as pipelines, underground storage tanks, locks, and ship hulls. What atomic repress 18 the types of cathodic defense? There are twain main types of cathodic security system formations: * Galvanic (sacrificial) anodes * A electrical cathodic protection system makes use of the corrosive potentials for several(predicate) metals. Without cathodic protection, one area of the structure exists at a more detrimental potential than another, and corrosion results. If, however, a lots less dull object (that is, with much more shun potential, such as a magnesium anode) is placed near to the structure to be protected, such as a pipeline, and a metallic connecter (insulated wire) is installed between the object and the structure, the object will become the anode and the broad(a) structure will become the cathode. That is, the new object corrodes sacrificially to protect the structure as shown in figure1. Thus, the galvanic cathodic protection system is called a sacrificial anode cathodic protection system because the anode corrodes sacrificially to protect the structure. Galvanic anodes are usually do of all magnesium or zinc because of these metals higher potential compared to steel structures. * Impressed current. * Impressed current cathodic protection systems use the same elements as the galvanic protection system, only the structure is protected by applying a current to it from an anode. The anode and the struct ure are connected by an insulated wire, as f! or the galvanic system. stream flows from...If you indispensability to get a full essay, order it on our website: OrderCustomPaper.com

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