CORROSION AND SCALING INHIBITOR Russian patent published in 2016 - IPC C02F5/04 C23F11/173 

FIELD: chemistry.

SUBSTANCE: invention relates to corrosion and scaling inhibitors and can be used in treatment of aqueous media of heat supply systems, water circulation supply of chemical, petrochemical, metallurgical, industrial and power plants, as well as in municipal services. Inhibitor includes phosphonates of alkali metals, phosphonocarboxylic acids and water-soluble polymers, wherein phosphonates of alkali metals are oxyethylene diphosphonates and/or nitrilotrimethyl phosphonates, and/or aminomethylene phosphonates and/or methylene diphosphonates and/or hexamethylenediamine tetramethylene phosphonates of alkali metals in following proportions, wt%: phosphonates of alkali metals 5-50, phosphonocarboxylic acids 5-45, water-soluble polymers 1-10.

EFFECT: invention allows to create corrosion and scaling inhibitor to aqueous media with high efficiency of preventing scaling and corrosion protection of process equipment made from steel and brass and simultaneously characterised by low content of phosphorus.

4 cl, 2 tbl, 31 ex