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Electroplating of chromium coatings from Cr(III)-based electrolytes containing water soluble polymer

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Abstract

The effect of certain water-soluble synthetic polymers on the current efficiency, the kinetics of partial cathodic reactions, and certain properties of coatings at the chrome plating from sulfate-formate baths based on Cr(III) salts is studied. A polymeric additive of the nonionogenic type N1 (3 × 106 g/mol) is proposed, which favors the deposition of chromium coatings that have good adhesion to the surface, do not crack, and have a thickness of several tens micrometers. It is found that the polymers have an accelerating effect on the aggregation of the particles of the chromium-hydroxide sol formed in the near-electrode layer, which, apparently, improves the deposit quality and enhances the current efficiency. It is shown that the resulting amorphous-crystalline chromium deposits are sufficiently hard and exhibit good protectiven ability at the anodic dissolution in aggressive media.

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Authors and Affiliations

  1. Ukrainian State Chemical and Technological University, pr. Gagarina 8, Dnepropetrovsk, 49005, Ukraine

    F. I. Danilov, V. S. Protsenko, T. E. Butyrina, E. A. Vasil’eva & A. S. Baskevich

Authors
  1. F. I. Danilov
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  2. V. S. Protsenko
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  3. T. E. Butyrina
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  4. E. A. Vasil’eva
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  5. A. S. Baskevich
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Additional information

Original Russian Text © F.I. Danilov, V.S. Protsenko, T.E. Butyrina, E.A. Vasil’eva, A.S. Baskevich, 2006, published in Zashchita Metallov, 2006, Vol. 42, No. 6, pp. 603–612.

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Danilov, F.I., Protsenko, V.S., Butyrina, T.E. et al. Electroplating of chromium coatings from Cr(III)-based electrolytes containing water soluble polymer. Prot Met 42, 560–569 (2006). https://doi.org/10.1134/S0033173206060075

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  • DOI: https://doi.org/10.1134/S0033173206060075

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