Authors & Affiliations

Niyazov S.-A.S., Ivanov K.D., Lavrova O.V.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Niyazov S.-A.S. - Senior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, sq. Bondarenko, Obninsk, Kaluga reg., Russia, 249033, Tel.: (484) 399-4440, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Ivanov K.D. – Leading Researcher, Doc. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Lavrova O.V. – Senior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.

Abstract

Mass transfer processes caused by interaction of heavy liquid metal coolants (HLMC) with structural steels are considered. These processes determine the ultimate lifetime of the steels in HLMC.

As applied to formation of protective anti-corrosion film on the surface of steels used in HLMC system, the general pattern of oxidation processes is proposed, and existing approaches to the description of steel oxidation kinetics are considered with focus on their drawbacks hindering analysis of criteria of the steel lifetime maximization under these conditions.

The processes taking place in the vicinity of steel matrix-oxide layer interface were studied, since principal effect on the steel oxidation nature was observed in this area.

Existing approaches to the description of oxidation processes caused by steel-HLMC interaction were considered. Their drawbacks are indicated that preclude from reliable forecasting oxidation process results in the long run.

It is shown that in order to have more appropriate description of the oxidation processes, some additional processes, having potential of strong effect on the steel oxidation kinetics, should be taken into account in the model under development.

Specific examples of such real processes related to the steel oxidation in HLMC are given, that would cause either spontaneous improvement of protective properties of the oxide films formed on the steel, or their deterioration.

Keywords
liquid metal coolant, structural steel, oxidation, corrosion, oxide film, steel matrix, diffusion permeability, interface, exposition, pitting corrosion, liquid metals, lead, lead-bismuth, magnetite

Article Text (PDF, in Russian)

References

UDC 621.039.534

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2016, issue 5, 5:18