The book contains modern methods of corrosion protection of underground pipelines of the factory network; methods of determining corrosion conditions of pipelines are described; the influence of corrosive environment, stray currents and biological factors on the metal is described; various methods of protecting pipelines are recommended: the use of corrosion-resistant materials, the treatment of a corrosive environment, the application of coatings, the installation of cathodic protection and the use of electrical drainage.