UA17676U - Cathode system for protection against corrosion - Google Patents

Abstract

A cathode system for anti-rust protection has as source of electric power a solar unit on solar batteries and pipeline and anode earth connected to it by cable.

Description

Description of the invention

The useful model refers to the field of water supply and drainage and can be used in 2 utilities and industrial facilities, in particular for the protection of structures from electrochemical corrosion.

A known corrosion protection system (1) containing a section of the pipeline covered with a protective concrete shell.

The disadvantage of this system is that during the operation of the pipeline, the protective coating is destroyed and, as a result, the efficiency of such a system drops sharply and the service life of the 710 water supply or drainage system as a whole decreases. It should be added that this system does little to protect the structure from electrochemical corrosion.

The anti-corrosion coating "Polipromsintez" I) is also known, which contains a primer layer based on polyester resin and a multi-layer coating base made of reinforced glass material. Such a combination of layers of different reinforced material increases the strength of the coating and ensures its high degree of adhesion to the 72 pipe surface, due to which the anti-corrosion protection increases. However, this system poorly protects the pipeline from the penetration of moisture to its surface, and therefore almost does not protect against electrochemical corrosion.

The closest technical solution, which is selected as a prototype, is the cathode installation of the IZ). It consists of a protective structure, anodic grounding, a constant current source, a contact device, a long-acting reference electrode with an electrochemical potential sensor, and a connecting line.

A disadvantage of the known corrosion protection system is that it does not use non-conventional sources of electricity, which is very important for trunk pipelines that are operated in the field and often pass through wet and swampy places far from traditional sources of electricity.

The useful model is based on the task of improving the cathodic corrosion protection system of a building located in wet soils where electrochemical corrosion occurs.

The task is solved by the fact that in the proposed system of corrosion protection, the source of electrical energy is a solar installation on solar batteries, to which the building and anode grounding are connected by a cable to protect the structure.

The proposed cathodic corrosion protection system is illustrated by the schematic diagram shown in the drawing (Fig. 1). It includes a protective structure 1, which is connected by a cable 2 to the negative terminal Z of the battery 4. ee,

Anodic grounding 7 is connected to positive terminal 5 of battery 4 by cable 6. -

To power the cathode system with electric current, an unconventional direct current source was chosen, which consists of a screen 8, solar batteries 9 located on it, a connecting cable 10 and a direct current converter 11. The entire solar system is mounted on a frame tower 12. Connecting the ends of electric cables 13 cups are placed in accessible places of the surface 14 and filled with insulating mass. 3о To compare the electrochemical potential near the protective structure 1 with the working potential of long-term action - sensor 15 is provided.

The cathodic corrosion protection system functions as follows.

When the sun's rays hit the selenium solar cells 9, an electric current appears, which flows through the cable 10 to the converter 11 and from there to the battery 4, where the constant current accumulates. After C 0 connection of the anode grounding 7 with the positive terminal 5 of the battery 4, the current flows and spreads into the surrounding environment, flows into the protective structure 1 and polarizes its metal. The protective current should be such that

From" so that the negative potential is within the established maximum and minimum values. Since a total potential is formed near the protective structure 1, the sensor 15 is used to compare the electrochemical potential near the protective structure 1 with the long-term operating potential. In case of insufficient insulation on the connecting cables, current will flow into the environment, therefore, all connecting - cables are made of double polyvinyl chloride insulation. For the same purpose, the place of connection of the ends of electric cables 14 is filled with epoxy resin.

According to information sources, the losses caused by corrosion of metals in industrially developed countries amount to approximately 5-1095 of the national income and are constantly growing. Therefore, the use of a cathodic -I 20 protection system, especially for main pipelines, which are often operated in chemically active and wet soils, extends their service life. Sources of information: 1. Drozd G.Ya., Zotov N.I., Maslyak V.N. Sewage pipeline!: reliability, diagnostics, sanitation. -

Donetsk: ChZPNAN, 2000. - 260p. 29 2. Patent Mo38965A, Ukraine, IPC E161I 58/10. Polymer anti-corrosion coating "Polipromsintez" / S.I. with Kadai, V.V. Bashun, Publ. 05/15/2001, Bull. Mo4. - Zs.

Z. Protection of underground metal structures from corrosion: Handbook. - M.: Stroyizdat, 1990. - pp. 239-276.

Claims (1)

The formula of the invention A cathodic corrosion protection system containing a source of electricity and a pipeline connected to it by a cable and anodic grounding, which is distinguished by the fact that the source of electricity contains a solar-powered solar installation.