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CATHODIC PROTECTION What is cathodic vindication? cathodic shelterion is a method to reduce corrosion by minimizing the difference in probable between anode and cathode. This is achieved by applying a current to the twist to be protected ( overmuch(prenominal) as a pipeline) from more or less international source. When enough current is applied, the whole organise go out be at ane potential; thus, anode and cathode sites give not exist. Cathodic apology is comm nevertheless roled on many types of body structures, such as pipelines, underground storage tanks, locks, and ship hulls. What atomic way out 18 the types of cathodic security? There are 2 main types of cathodic security department formations: * Galvanic (sacrificial) anodes * A electric cathodic protection system makes use of the corrosive potentials for assorted metals. Without cathodic protection, one area of the structure exists at a more detrimental potential than another, and corrosio n results. If, however, a much less dull object lens (that is, with much more electronegative potential, such as a magnesium anode) is placed side by side(p) 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 sacrif icially to protect the structure. Galvanic a! nodes are 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. topical flows from...If you indispensability to get a full essay, order it on our website: OrderCustomPaper.com

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