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Investigation of the kinetics of the growth of passivating layers on titanium in sulfuric acid by the method of alternating-current polarization

  • Physical Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    It was shown by the method of polarization of titanium in 10 N H2SO4 by rectangular alternating current asymmetrical with respect to duration that the amount of metal dissolving in one cycle is a parabolic function of the duration of the anodic half-period.

  2. 2.

    It was established by the method of polarization of titanium with sinusoidal current of various frequencies that the first step of the adsorption of a monolayer of oxygen on the metal is completed in 5·10−5 sec. The further growth of the thickness of the adsorbed oxygen layer is determined by diffusion factors.

  3. 3.

    According to the data of a semiquantitative calculation, the first stage of the adsorption of oxygen occurs not over the entire surface of the metal, but only on individual active portions. On these same portions there is a subsequent completion of the adsorption layer.

  4. 4.

    On the basis of the experimental data, passivating properties of the atomic hydrogen adsorbed on the surface of titanium in H2SO4 were hypothesized.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Academy of Sciences of the USSR, USSR

    Yu. N. Mikhailovskii

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  1. Yu. N. Mikhailovskii
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 807–814, May, 1966.

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Mikhailovskii, Y.N. Investigation of the kinetics of the growth of passivating layers on titanium in sulfuric acid by the method of alternating-current polarization. Russ Chem Bull 15, 773–778 (1966). https://doi.org/10.1007/BF00849369

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  • DOI: https://doi.org/10.1007/BF00849369

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