METHOD FOR DETERMINING THE CORROSION RATE OF STEELS IN HEAVY LIQUID METAL COOLANTS CONTAINING OXYGEN Russian patent published in 2023 - IPC G01N17/00 

FIELD: corrosion tests.

SUBSTANCE: use in the nuclear industry to justify the performance of construction materials of new generation reactor plants. The method for determining the corrosion rate of steels in heavy liquid-metal coolants containing oxygen includes the preparation of samples with the determination of their surface area S, mass m_o and density ρ_Me before testing, exposure of samples in a corrosive environment for a certain time t, determination of the mass m₁ and the average density of samples with corrosion products ρ_ср after testing and calculation of the corrosion rate using the measured values of the mass m_o, m₁ and the density of the samples ρ_Me, ρ_ок before and after corrosion tests and known values of the density of corrosion products ρ_ok by the following formula:

.

At the same time, after testing steels in heavy liquid-metal coolants containing oxygen, a phased removal of lead residues from the surface of the samples is carried out chemically in a solution of H₂O:CH₃COOH:H₂O₂=4:1:3 until the sample mass remains constant and control lead content in corrosion products, which should be no more than 2% by weight.

EFFECT: increasing the accuracy and reliability of determining the corrosion rate, expanding the scope and improving the manufacturability of measurements.

1 cl, 2 dwg, 3 tbl