UNDERCOAT-RUST SOLVENT Russian patent published in 2010 - IPC C09D5/08 C09D5/12 

FIELD: chemistry.

SUBSTANCE: invention relates to undercoat-rust solvents which prevent metal corrosion and are designed for preparing metal surfaces for painting without removal of corrosion products first and can be used, for instance for treating large structures made from low-carbon steel: bridges, electric power pylons, external and internal surfaces of carriages designed for transporting aggressive material, in particular mineral fertilisers in mildly cold and wet climatic conditions. The undercoat-rust solvent contains foamed polystyrene, potassium ferrocyanide (yellow prussiate of potash), orthophosphoric acid (70%), butylacetate as a solvent and azimido-benzene as a corrosion inhibitor.

EFFECT: obtaining a composition of an undercoat-rust solvent with optimum viscosity, flow behaviour, shorter drying period of the coating, formation of a protective film on the metal surface which prevents further corrosion of the metal, as well as improved physical and mechanical properties of the coating and increased corrosion resistance of the treated objects in the said aggressive media and improved sanitary-hygienic labour conditions.

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