STEEL CORROSION INHIBITOR AND METHOD OF ITS RECEIVING Russian patent published in 2009 - IPC C23F11/173 

FIELD: metallurgy.

SUBSTANCE: invention relates to field of steel protection against corrosion and can be used for protection of overpasses, railway and highway bridges and other metal constructions and structures. Inhibitor contains, wt %: polyoxyethylene 0.001-0.1; bentonitic clay 0.5-4.0; soda ash 0.1-1.0 and water - the rest. Method includes introduction into water solution polyoxyethylene with concentration 0.9-1.0 wt % soda ash solution with concentration 0.9-10 wt % and reduction of pH till -9, after what with the rate 1 l/min it is introduced aqueous suspension solution of bentonitic clay with concentration 5-10 wt %. Then it is added water for receiving of required inhibitor concentration. Process is implemented with constant mixing at 18-22°C. Into the composition there are entered accessible components and method of receiving is simple and low-cost. Final product refers to low-hazard substances.

EFFECT: development of simple and economical method of steel protection against corrosion.

2 cl, 2 ex