Structural-Phase Composition and Corrosion Behavior of Finely Dispersed Fe-C Powders in Neutral Media |
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| Authors: | S F Lomayeva B B Bokhonov A V Syugaev E P Elsukov and S M Reshetnikov |
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| Affiliation: | (1) Physicotechnical Institute, Ural Division, Russian Academy of Sciences, ul. Kirova 132, Izhevsk, 426000, Russia;(2) Institute of Solid-State Chemistry and Mineral Processing, Siberian Division, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128, Russia;(3) Udmurt State University, ul. Universitetskaya 1, Izhevsk, 426034, Russia |
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| Abstract: | Effects of the structural-phase state and the structure of the surface layer on the corrosion behavior of mechanically activated
finely dispersed Fe-C powders were studied. The powders prepared by mechanical milling of iron in graphite or heptane were
mixtures of phases (nanocrystalline α-Fe + amorphous Fe-C phase (AP), α-Fe + Fe3C, and α-Fe + graphite) in different ratios. Corrosion tests were carried out in a model medium (0.85% NaCl) at 37°C. The
oxide surface layer of powders containing a high content of AP was found to exhibit protective properties. The corrosion behavior
of the powders is insensitive to such changes in the structural-phase state as the formation of carbides, graphite encapsulation,
grain size alterations, and hydrogenation.
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Translated from Zashchita Metallov, Vol. 41, No. 5, 2005, pp. 501–507.
Original Russian Text Copyright ? 2005 by Lomayeva, Bokhonov, Syugaev, Elsukov, Reshetnikov. |
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