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Acta Armamentarii ›› 2020, Vol. 41 ›› Issue (3): 567-576.doi: 10.3969/j.issn.1000-1093.2020.03.018

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Influence of Environmental Factors on Corrosive Electrostatic Field under Laminar Current

LIU Dehong1, ZHANG Jianchun2, WANG Xiangjun3   

  1. (1.City College, Wuhan University of Science and Technology, Wuhan 430083, Hubei, China; 2.Unit 31437 of PLA, Shenyang 110020, Liaoning, China; 3.School of Electric Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China)
  • Received:2019-03-13 Revised:2019-03-13 Online:2020-05-11

Abstract: In order to fit the corrosive electrostatic field produced by the theoretical model better with the experimental results measured in the actual seawater environment, a method for calculating point charge potential based on Sommerfeld integral in flowing media is proposed, and the influence of environmental factors on the amplitude of electrostatic field is qualitatively analyzed. The corrosion current density under the control of electrochemical polarization and concentration polarization is calculated based on the electrochemical and hydrodynamic theories, a point charge model is established based on the corrosion current density, and the corrosive electrostatic field in a medium is calculated. The variation rule of electrostatic field amplitude with the medium temperature, salinity and flow rate was obtained and verified by experiments. The results show that the actual corrosion situation is more complex than that of the theoretical model. Under certain environmental conditions, the experimental results are good agreement with the theoretically calculated results, and the average fitting error is less than 10%. Key

Key words: corrosiveelectrostaticfield, laminarcurrent, environmentalfactor, flowrate, pointcharge, Sommerfeldintegralmethod

CLC Number: