One of the important stages of modern pipeline production is anti -corrosion protection of these products in order to increase their durability and ensure the economic efficiency of their operation. Metallic ones protect against corrosion with passive and active methods. In the first case, insulating layers or special membranes are applied from the outer and inside of the rental, and in the second, electrical protection of the walls of the PROSITS is carried out. For example, cast-iron at manufacturing plants are covered with anti-corrosion mastics, steel from the outside is isolated by bitumen-polymer or bitumen-mineral, as well as ethylene or polymer coatings. The internal surfaces of steel water pipes on special equipment are covered with cement compositions by centrifugation. Those of them that are taken for use in household networks, as a rule, are protected from the influence of the external environment through paints and varnishes due to their efficiency and low labor intensity. Metals rental with expensive additives (Erbia or Tullia) are protected by zinc coatings, as well as the method of cathode protection.
