Patent ID: 6019942
Filing Date: 2000-02-01
Classification: C23C,C23F,F01D,F28F

Abstract:
The maintenance method of corrosion resistance of a steel circulation circuit with lead containing coolant, which includes the development of an anticorrosive cover out of oxides of structural steel components on a circuit internal surface characterized in that in the course of the circuit operation, the concentration of oxygen dissolved in the coolant is maintained not lower than the value determined from the expression:IgC=-0.33-2790/T+IgC.sub.S +IgjC.sub.PB,whereC is the concentration of oxygen dissolved in the coolant, mass %;T is the maximum temperature of the coolant in the circuit, .degree. K.;C.sub.S is the saturated concentration of oxygen dissolved in the coolant at the temperature T, mass %;j is the thermodynamic activity coefficient of lead in the coolant, inverse mass %; andC.sub.Pb is the lead concentration in the coolant, mass %.