CORROSION PREVENTION METHOD OF INTERNAL SURFACE OF STEEL PIPES OF WATER HEAT SUPPLY Russian patent published in 2020 - IPC C23F15/00 F28F19/00 F16L58/00 

FIELD: heat supply.

SUBSTANCE: invention relates to heat supply of civil and industrial buildings and structures. Method of preventing corrosion of internal surface of steel pipes of water heat supply consists in electromagnetic action on pipes by inductance coils included in standard industrial electric network, and supply of carrier through heater. Heater pipes at inlet and outlet are isolated by dielectric branch pipes from heat network, electric characteristics of inductance coils are provided to required heat capacity, additional electric capacitance is connected to heater coils, active electric resistance and inductance, values of which are calculated taking into account inductance of coils of heater, and are corrected experimentally, form resonance LCR-oscillatory circuit by them, switch on for constant operation, heat carrier is pumped through heater, acting on it by resonant alternating electromagnetic field, pH is increased from acidic to alkaline number by changing physicochemical interaction of heat carrier with iron of pipes and prevents corrosion of their inner surfaces.

EFFECT: use of the method will make it possible to exclude corrosion of internal surfaces of steel pipes of heat supply and to increase service life of more than 30 years.

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