CATHODIC PROTECTION PDF
Cathodic protection is a proven corrosion control method for protection of underground Cathodic protection is now widely applied in the protection of oil. The reference cell is placed as close as possible to the structure under test (near structure). ➢ A structure-to-soil potential is read and recorded. ➢ The reference. Principles governing cathodic protection are illustrated in Fig. below. As per mixed potential theory, the zero current criterion is shown. An equilibrium is.
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The first practical use of cathodic protection is generally credited to Sir Humphrey Davy in the s. Davy's advice was sought by the Royal Navy in. is called a “cathodic” protection system.” The cathodic protection anodes are installed to become the anode in this larger corrosion cell and provide the location. PDF | Cathodic protection (CP) is a method of preventing corrosion of a metal surface by making it the cathode of an electrical circuit. Without.
To understand cathodic protection, you must first understand how corrosion is caused. For corrosion to occur, three things must be present:. Two dissimilar metals 2. An electrolyte water with any type of salt or salts dissolved in it 3. A metal conducting path between the dissimilar metals. The two dissimilar metals may be totally different alloys — such as steel and aluminum — but are more likely to be microscopic or macroscopic metallurgical differences on the surface of a single piece of steel.
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