COMPOSITION FOR PROTECTION OF WATER SUPPLY AND WATER DISPOSAL SYSTEMS AGAINST CORROSION AND DEPOSIT OF SALTS Russian patent published in 2007 - IPC C23F11/18 C23F14/02 C02F5/06 

FIELD: devices for protection against corrosion and deposition of salts, mainly scale, of water supply and water disposal systems.

SUBSTANCE: proposed composition contains the following components, mass-%: phosphoric acid (in terms of 100-% acid),0.01-74; calcium oxide or calcium hydroxide, or calcium carbonate or mixture of them (in terms of calcium oxide), 5-25; magnesium oxide or magnesium hydroxide, or magnesium carbonate, or mixture of them (in terms of magnesium oxide), 0.45-5; potassium hydroxide or potassium carbonate or mixture of them (in terms of potassium oxide), 0.01-5; silicon dioxide or water glass (in terms of silicon dioxide),0.2-2.2; sodium phosphates of common formula xNa₂OyP₂O₅zH₂O at molar ratio of (Na₂O+H₂O)/P₂O₅ from 1 to 3 (in terms of sodium oxide), 8-75; magnesium oxides of common formula Mn_xO_y at molar ratio Mn/O from 1 to 2 (in terms of magnesium), 0.01-0.3.

EFFECT: enhanced ecological safety; improved anti-corrosion and anti-scale properties; improved quality of water due to deceleration of eutrophication process.

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