ADDITIVE INHIBITING WATER CORROSION AND PROCESS FOR PREPARING THE SAME

Inventia se refera la un aditiv al apei inhibitor de coroziune si la un procedeu de preparare a acestuia. Aditivii apei, conform inventiei, contin drept ingredient activ un fosfat organic cu formula (I) (vezi formula în pag.1 a descrierii) în care: R1 este hidrogen, R2 este ciclohexil, iar n este 0,5...3 în combinatie cu fosfat de zinc. Compozitiile, conform inventiei, se prepara prin reactia acidului fosforic 5...85%, cu ciclohexil amina sau diciclohexil amina si adaugarea la amestecul obtinut a cel mult 10% fosfat de zinc sau alt compus din care fosfatul de zinc poate fi format cu acidul fosforic, înaintea, în timpul sau dupa reactie. Agentii inhibitori de coroziune, conform inventiei, pot fi folositi pentru reducerea vitezei de coroziune în sistemele de circulatie a apei. The water additives contain as active substance organic phosphates having the general formula (I) and zinc phosphate. In the general formula (I), R1 is hydrogen or a cyclohexyl group and R2 is a cyclohexyl group, and n has a value comprised between 0.5 and 3. Said water additives are prepared by transformation of 5-85% of phosphoric acid with cyclohexyl amine or dicyclohexyl amine and addition to the mixture before, during or after the transformation of at the most 10% of zinc phosphate with respect to the organic phosphate or of a zinc compound forming zinc phosphate with the phosphoric acid. Said corrosion inhibiting water additive may be used in cold water - and hot water - cooling circuits in order to reduce the corrosion speed.