Corrosion of Cobalt-Molybdenum Alloys in Chloride Solutions

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...

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Bibliographic Details
Published in:	Materials science (New York, N.Y.) Vol. 54; no. 4; pp. 512 - 518
Main Authors:	Shtefan, V. V., Smyrnov, O. O., Bezhenko, A. O., Epifanova, A. S., Kanunnikova, N. O., Metenkanych, M. M., Knyazev, S. A.
Format:	Journal Article
Language:	English
Published:	New York Springer US 01-01-2019 Springer Springer Nature B.V
Subjects:	Alloys Aqueous solutions Characterization and Evaluation of Materials Chemistry and Materials Science Cobalt Cobalt base alloys Corrosion (Chemistry) Corrosion resistance Corrosion resistant alloys Equivalent circuits Halides Materials Science Metals (Materials) Molybdenum Molybdenum alloys Molybdenum base alloys Morphology Petrochemicals industry Protective coatings Solid Mechanics Specialty metals industry Spectroscopy Steel corrosion Structural Materials Technical institutes impedance alloy cobalt coating molybdenum
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Summary:	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 Co 7 Mo 6 compound is predominant in the Co–Mo alloy.
ISSN:	1068-820X 1573-885X
DOI:	10.1007/s11003-019-00225-y