A Study of the Initial Stages of Local Dissolution of Carbon Steel in Chloride Solution

  • N. A. GladkikhEmail author
  • M. A. Maleeva
  • L. B. Maksaeva
  • M. A. Petrunin


The simultaneous application of optical and electrochemical methods has allowed us to investigate in detail the initial stages of the local dissolution of steel in a chloride-containing solution. The incubation period, the rate of defect formation on the surface, and the rate of individual defects development have been evaluated with high precision. It has been demonstrated that the emergence and development of local defects is possible under potentials more negative than the pitting potential determined from the polarization curve. The metal dissolution rates that occur at the initial stages of pitting formation from an individual defect have been calculated. It has been established that the initial process of defect formation under anode polarization consisted of two stages. The first stage corresponds to the emergence and intense formation of the freshly formed defect and is primarily determined by electrode potential. The second stage is shown by the development of a defect that did not depend on potential.


steel local dissolution pitting optical investigation methods corrosion imaging 



This work was supported by Russian Foundation for Basic Research, grants no. 16-08-00445 and no. 17-03-00232.


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • N. A. Gladkikh
    • 1
    Email author
  • M. A. Maleeva
    • 1
  • L. B. Maksaeva
    • 1
  • M. A. Petrunin
    • 1
  1. 1.Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of SciencesMoscowRussia

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