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Corrosion degradation of chromium coatings on steel in NaCl concentrated solution

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Abstract

Corrosion-electrochemical behavior of chromium coatings at steel substrates (40X, 20X13, and 12X18H10T) in concentrated (318 g/l) NaCl solution at elevated temperatures is studied, in particular, under conditions of friction against rubber (thus modeling the mine screw-driller rotor operation conditions). By and large, the chromium coatings in the studied solution have fairly good corrosion stability. However, when through pores occur in the coatings, chromium-steel galvanic couples are formed, in which chromium is the anode, and steel, the cathode. This causes intense corrosion damage to the coating in close proximity to the pores. Steel undergoes no corrosion here. It is the Cr-coating porosity that gives rise to its accelerated degradation under the friction, although friction as such does not accelerate the corrosion catastrophically.

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Authors and Affiliations

  1. Perm’ State University, ul. Bukireva 15, Perm’, 614990, Russia

    I. V. Petukhov, M. G. Shcherban’, V. I. Kichigin & A. V. Zaitseva

  2. Institute of Continuous Media Mechanics, Ural Branch, Russian Academy of Sciences, ul. Akademika Koroleva 1, Perm’, 614061, Russia

    E. V. Mikhailov

  3. Perm’ Branch of All-Russian Research Institute of Drilling Equipment, ul. Karpinskogo 24, Perm’, 614000, Russia

    S. V. Zavodchikov

Authors
  1. I. V. Petukhov
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  2. M. G. Shcherban’
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  3. V. I. Kichigin
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  4. A. V. Zaitseva
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  5. E. V. Mikhailov
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  6. S. V. Zavodchikov
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Additional information

Original Russian Text © I.V. Petukhov, M.G. Shcherban’, V.I. Kichigin, A.V. Zaitseva, E.V. Mikhailov, S.V. Zavodchikov, 2006, published in Zashchita Metallov, 2006, Vol. 42, No. 4, pp. 412–424.

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Petukhov, I.V., Shcherban’, M.G., Kichigin, V.I. et al. Corrosion degradation of chromium coatings on steel in NaCl concentrated solution. Prot Met 42, 378–388 (2006). https://doi.org/10.1134/S0033173206040126

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  • DOI: https://doi.org/10.1134/S0033173206040126

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