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Passivation of zinc coatings in cerium-containing solutions

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Abstract

Process was developed for no-chromate passivation of zinc coatings in a solution containing 20-40 g L-1 of cerium nitrate, 5-25 mL L-1 H2O2, and 2-8 g L-1 of an additive (8-10 g L-1 of malic acid and 4-8 g L-1 of sodium nitrate) at a temperature of 40-60°C and pH 2.5-3.5. It was shown that cerium-containing passivating coatings on zinc-plated steel articles compare well in corrosion resistance and protecting capacity with iridescent chromate coatings. It was found that cerium-containing coatings are capable of self-healing and sustain a thermal shock without degradation of their characteristics.

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Authors and Affiliations

  1. Mendeleev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow, 125047, Russia

    A. A. Abrashov, N. S. Grigoryan, T. A. Vagramyan & E. A. Zheludkova

  2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 47, Moscow, 119991, Russia

    V. P. Meshalkin

Authors
  1. A. A. Abrashov
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  2. N. S. Grigoryan
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  3. T. A. Vagramyan
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  4. E. A. Zheludkova
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  5. V. P. Meshalkin
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Corresponding author

Correspondence to N. S. Grigoryan.

Additional information

Original Russian Text © A.A. Abrashov, N.S. Grigoryan, T.A. Vagramyan, E.A. Zheludkova, V.P. Meshalkin, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 10, pp. 1409-1413.

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Abrashov, A.A., Grigoryan, N.S., Vagramyan, T.A. et al. Passivation of zinc coatings in cerium-containing solutions. Russ J Appl Chem 88, 1594–1598 (2015). https://doi.org/10.1134/S1070427215100067

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  • DOI: https://doi.org/10.1134/S1070427215100067

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