Materials Science

, Volume 45, Issue 6, pp 899–904 | Cite as

A two-step method for the evaluation of corrosion rate in metals


We analyze the negative influence of the polarization capacity of corroding electrodes on the accuracy of evaluation of the corrosion rate. Due to the influence of deposits, the impedance of the electrode has an abnormally high capacity [(104 - 105) μF/cm2]. The difficulties encountered in measuring the polarization resistance and, hence, the corrosion rate in the process of galvanostatic polarization are caused by the uncertainty of the time of complete charging of the capacity and, hence, the time of termination of measurements. We deduce the analytic dependence of the true value of corrosion rate on various polarization currents in the process of measurements and check it with the help of an experimental model of the source of direct current with galvanostatic polarization and recording the polarization voltage on the equivalent circuit of two-electrode corrosion transducer. The results obtained by using the proposed two-step method are independent of the polarization capacity and the duration of the transition process, whereas the period of measurements is much shorter than the period of complete (98%) charging of the polarization capacity and admissible for the corrosion measurements.


corrosion rate polarization resistance polarization capacity low-carbon steel neutral aqueous medium 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    F. Mansfeld, “The polarization resistance technique for measuring corrosion currents,” in: M. G. Fontana and R. W. Staehle (editors), Advances in Corrosion Science and Technology, Vol. 6, Plenum Press, New York (1976), pp. 163–262.Google Scholar
  2. 2.
    Ts. I. Zalkind and Ya. M. Kolotyrkin, “Continuous corrosion control of operating equipment,” Itogi VINITI, Korroz. Zashchita Korroz., 8, 181—216 (1981).Google Scholar
  3. 3.
    L. I. Antropov, M. A. Gerasimenko, and Yu. S. Gerasimenko, “Determination of corrosion rates and the efficiency of inhibitors by the method of polarization resistance,” Zashch. Met., 2, No. 2, 115–121 (1966).Google Scholar
  4. 4.
    A. Boriskin and Yu. Gerasimenko, “Polarization capacity of corroding steel electrodes,” Fiz.-Khim. Mekh. Mater., Special Issue, 1, No. 4, 41–46 (2004).Google Scholar
  5. 5.
    M. Prazak, “The polarization resistance method for corrosion testing,” Werkstoffe Korros., 25, No. 2, 104–112 (1974).CrossRefGoogle Scholar
  6. 6.
    N. Azzerri, “Corrosion rate measurement by polarization resistance on hindered surfaces exhibiting pseudocapacity,” J. Appl. Electrochem., 6, 139–146 (1976).CrossRefGoogle Scholar
  7. 7.
    Yu. S. Gerasimenko, N. F. Kuleshova, and I. A. Korol’, “Evaluation of the polarization capacity of low-carbon steel in neutral media with the help of an R5035 measuring instrument,” Zashch. Metal., 24, 887–890 (1988).Google Scholar
  8. 8.
    M. Kato and M. Koyama, “Modified method of polarization resistance. Measuring of polarization resistance by using the initial transient curves for direct current,” Boshoku Gijutsu, 34, No. 4, 215–221 (1985).Google Scholar
  9. 9.
    F. P. Ijsseling, “Application of electrochemical methods of corrosion rate determination to systems involving corrosion product layers,” B. Corrosion J., 21, No. 2, 95–101 (1986).Google Scholar
  10. 10.
    D. A. Jones and M. D. Greene, “Electrochemical measurement of low corrosion rates,” Corrosion, 22, No. 7, 198 (1966).Google Scholar
  11. 11.
    Yu. S. Gerasimenko, I. A. Korol’, and A. V. Boriskin, Instrument for Measuring Polarization Resistance, Inventor’s Certificate No. 1790291 G 01N 27/48.Google Scholar
  12. 12.
    I. A. Korol’, A. V. Boriskin, and Yu. S. Gerasimenko, Instrument for Measuring Polarization Resistance, Inventor’s Certificate No. 1831111 G 01N 27/26.Google Scholar
  13. 13.
    Yu. S. Gerasimenko, N. F. Kuleshova, A. V. Boriskin, V. I. Sorokin, and N. F. Fedchenko, “UK-2-type corrosion-indicator installation,” Vodosnab. Sanit. Tekhn., No. 11, 23 (1989).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  1. 1.“Kiev Polytechnic Institute” National Technical UniversityKyivUkraine

Personalised recommendations