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Mechanism of protective action of certain oil-soluble corrosion inhibitors

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  1. 1.

    It has been established that the protective effectiveness of oil-soluble corrosion inhibitors of the MSDA-11 type is related not only to their ability to form adsorbed barrier films to make the metal surface hydrophobic, but also to their migration to the aqueous phase and their effects on the kinetics of the electrode reactions responsible for the corrosion process.

  2. 2.

    Effective oil-soluble inhibitors of this type improve the electrode potential of the metal and retard the anodic process of metal ionization in aqueous extracts from inhibited oils, in a manner analogous to that of anodic water-soluble corrosion inhibitors.

  3. 3.

    It has been shown that measurements of electrode potentials and recording of polarization curves of metals in aqueous extracts from oils containing corrosion inhibitors can be used as a means of rating the relative effectiveness of oils with certain inhibitors, provided these inhibitors are partially water-soluble.

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Literature cited

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    S. Z. Krein and Yu. N. Shekhter, Nitrated Oils [in Russian], Izd. Khimiya (1967).

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    D. S. Velikovskii, V. V. Vainshtok, et al., Greases [in Russian], Izd. Khimiya (1968).

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    G. Bregman, Corrosion Inhibitors [Russian translation], Izd. Khimiya (1966).

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    A. A. Gonik, Transactions of the Third All-Union Conference on the Use of Surfactants in the Petroleum Industry [in Russian], Izd. Khimiya (1964).

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    Yu. N. Shekhter, Protecting Metals from Corrosion [in Russian], Izd. Khimiya (1964).

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    Collection: Preservation of Instruments, Mechanism, and Equipment for Long Storage Periods [in Russian], LDNTP(1966), pp. 3–15.

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    S. A. Gintsberg, ibid., pp. 16–21.

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    P. A. Vinogradov et al., Preservation of Articles with Inhibitors for Atmospheric Corrosion of Metals [in Russian], LDNTP (1968), pp. 27–29.

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    Collection: Inhibited Petroleum-Based Coatings [in Russian], MDNTP (1968), pp. 172–176.

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    Collection: Material from Interdisciplinary Scientific-Technical Conference on Corrosion Inhibitors and Preservative Lubricants (Negreev lectures) [in Russian], Baku (1968), pp. 75–77, 85–86.

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    Collection: Inhibitors, Preservative Lubricants, and Preservation of Metal Articles [in Russian], TsNIITÉneftekhim (1969), pp. 3–11, 99–104.

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    Specification MRTU-6-04-146 - 63 [in Russian].

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    I. L. Rozenfel'd and K. A. Zhigalova, Accelerated Methods for Metal Corrosion Testing [in Russian], Izd. Metallurgiya (1966).

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    S. A. Gintsberg, Trudy VNIKhIPM, No. 7 (1958).

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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 45–48, March, 1971.

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Kharitonov, I.S., Vainshtok, V.V., Gintsberg, S.A. et al. Mechanism of protective action of certain oil-soluble corrosion inhibitors. Chem Technol Fuels Oils 7, 222–225 (1971). https://doi.org/10.1007/BF00719542

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  • Migration
  • Metal Ionization
  • Aqueous Phase
  • Metal Surface
  • Aqueous Extract