Ship Power Plants and Their Components

Minaev E., Macheev M.

EVGENY MINAEV, Professor, Department of General Physics, e-mail: emin@sstu.ru; MIKHAIL MACHEEV, Student
Yuri Gagarin State Technical University of Saratov.
77 Politechnicheskaya St., Saratov, Russia, 410054

The calculation of oxyhen mass transfer in the energy equipment channels being under cathodic protection from corrosion

Abstract: The paper deals with the issue of modelling the oxygen mass transfer on the border “metal–solution” from the side of liquid under cathodic polarisation of the surface. The modelling is based on the derivation and solution of the boundary value problem for the equation of convectional diffusion with the linear speed profile, the choice the equation and single-valuedness conditions being substantiated. The equations for the concentration and density of the oxygen current on the border are presented in this paper. The equations enable one to calculate the change of physico-chemical characteristics of the boundary layer under its cathodic polarisation.
Key words: corrosion, cathodic protection, convectional diffusion, concentration of oxygen, energy equipment.

REFERENCES

1. Backman V., Schwenk V. Cathodic protection against corrosion. M., Metallurgy, 1984, 381 p. (in Russ.). [Bekman V., Shvenk V. Katodnaja zashhita ot korrozii. M.: Metallurgija, 1984. 381 s.].
2. Levich V.G. Physico-chemical hydrodynamics. M., USSR Academy of Sciences Publishing, 1958, 495 p. (in Russ.). [Levich V.G. Fiziko-himicheskaja gidrodinamika. M.: Izd-vo AN SSSR, 1958. 495 s.].
3. Minaev E.N. Methods of Mathematical Physics in the investigation of electrochemical systems, monograph. Saratov, Yuri Gagarin State Technical University of Saratov, 2015, 240 p. (in Russ.). [Minaev E.N. Metody matematicheskoj fiziki pri issledovanii jelektrohimicheskih sistem: monografija. Saratov: SGTU im. Gagarina Ju.A., 2015. 240 s.].
4. Minaev E.N. Parametric identification of boundary value problems in the transport of substances in the development of electrochemical methods of control, monograph. Saratov, CUBES Publishing, 2014, 90 p. (in Russ.). [Minaev E.N. Parametricheskaja identifikacija v kraevyh zadachah perenosa veshhestva pri razrabotke metodov jelektrohimicheskogo kontrolja: monografija. Saratov: KUBiK, 2014. 90 s.].
5. Fetter K. Electrochemical kinetics, ed. Ya.M. Kolotyrkin. M., Chemistry, 1967, 573 p. (in Russ.). [Fetter K. Jelektrohimicheskaja kinetika / pod red. Ja.M. Kolotyrkina. M.: Himija, 1967. 573 s.].
6. Gnedenkov S.V., Sinebryukhov S.L., Mashtalyar D.V., Tsvetnikov A.K., Minaev A.N. Effect of conditions of treatment with superdispersed polytetrafluoroethylene on properties of composite coatings. Protection of Metals and Physical Chemistry of Surfaces. 2010(46);7:823-827.