Abstract
Regularities of the physicochemical behavior of α-Fe + Fe3C nanocomposites in a concentration range of cementite from 9 to 92 wt % in sulfate and chloride solutions are studied. Nanocrystalline state (∼40 nm) is found to intensify the active dissolution of α-Fe + Fe3C alloys and not noticeably affect the hydrogen evolution in acidic environments. With an increase in the cementite content or when it forms a reticular structure, the catalytic activity of α-Fe + Fe3C nanocrystalline composites with respect to the hydrogen evolution increases. Cementite manifests a higher overpotential of dissolution in both sulfate and chloride solutions.
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Original Russian Text © A.V. Syugaev, S.F. Lomaeva, S.M. Reshetnikov, 2010, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2010, Vol. 46, No. 1, pp. 74–80.
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Syugaev, A.V., Lomaeva, S.F. & Reshetnikov, S.M. Electrochemical properties of α-Fe + Fe3C nanocrystalline composites in acidic environments. Prot Met Phys Chem Surf 46, 82–89 (2010). https://doi.org/10.1134/S2070205110010120
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DOI: https://doi.org/10.1134/S2070205110010120