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CATHODIC PROTECTION What is cathodic vindication? cathodic shelterion is a method to reduce corrosion by minimizing the difference in capability between anode and cathode. This is achieved by applying a current to the twist to be protected ( untold(prenominal) as a pipeline) from whatsoever international source. When enough current is applied, the whole organise impart be at ane potential; thus, anode and cathode sites bequeath non exist. Cathodic apology is comm besides roled on many types of constructions, such as pipelines, underground storage tanks, locks, and ship hulls. What atomic fleck 18 the types of cathodic justification? There are 2 main types of cathodic security department formations: * Galvanic (sacrificial) anodes * A galvanic cathodic protection system makes use of the corrosive potentials for incompatible metals. Without cathodic protection, one area of the structure exists at a more detrimental potential than another, and corr osion results. If, however, a much less dull target area (that is, with much more forbid potential, such as a magnesium anode) is placed neighboring 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 ar! e usually make 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 structure are connected by an insulated wire, as for the galvanic system. circulating(prenominal) flows from...If you indispensability to get a full essay, order it on our website: OrderCustomPaper.com

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