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Corrosion of Cobalt-Molybdenum Alloys in Chloride Solutions

  • V. V. ShtefanEmail author
  • O. O. Smyrnov
  • A. O. Bezhenko
  • A. S. Epifanova
  • N. O. Kanunnikova
  • M. M. Metenkanych
  • S. A. Knyazev
Article
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We study the protective properties of coatings made of Co–Mo alloy in 3% NaCl and 5% HCl aqueous solutions containing 0, 10, 25, 50, 75, and 85 wt.% Mo. The method of impedance spectroscopy is used to construct the equivalent circuit and determine its parameters. The accumulated results are used to make conclusions concerning the corrosion resistance of the alloy in chloride-containing media. We obtain the data on the elemental composition of the investigated coatings and study their surface morphologies. It is shown that the Co7Mo6 compound is predominant in the Co–Mo alloy.

Keywords

alloy coating cobalt molybdenum impedance 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • V. V. Shtefan
    • 1
    Email author
  • O. O. Smyrnov
    • 2
  • A. O. Bezhenko
    • 2
  • A. S. Epifanova
    • 1
  • N. O. Kanunnikova
    • 1
  • M. M. Metenkanych
    • 1
  • S. A. Knyazev
    • 1
  1. 1.“Kharkiv Polytechnic Institute”National Technical UniversityKharkivUkraine
  2. 2.“‘UKRNAFTOKHIMPROEKT’ Ukrainian Institute for the Design of Oil-Processing and Petrochemical Plants,”PJSCKievUkraine

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