Abstract: This chapter discusses the principles of cathodic protection against corrosion. Cathodic protection is restricted to environments of suitable conductivity. It is suitable for steels immersed in sea water but is also used in water and soil of suitable conductivity. However, it is not a suitable method for the control of corrosion in air. Steel reinforcements in concrete can be protected in some atmospheric situations by cathodic protection. An understanding of the principles of cathodic protection might assist engineers in determining when and where to consider the application of the method. The requirement for cathodic protection is to achieve a situation on the surface of the metal to be protected where no local corrosion currents occur. In electrochemical terms, this involves the supply of electrons to the steel, which can be achieved by impressed current method and by the sacrificial anode method.
Publication Year: 1985
Publication Date: 1985-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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