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A Gavrilović, L Rafailović, W. Artner, J Wosik, A Whitehead:
"The corrosion behavior of amorphous and nanocrystalline Fe73.5Cu1Nb3Si15.5B7 alloy";
Corrosion Science, 53 (2011), 2400 - 2405.

The potentiodynamic polarization curves in 0.5 M NaCl solution before and after crystallization of
Fe73.5Cu1Nb3Si15.5B7 alloy have been studied in relation to the microstructure and alloy composition. It
was shown that the corrosion resistance of the alloy strongly depending on these two factors. The
observed decrease in corrosion resistance of the alloy after the heat treatment up to 480 C in comparison
to the corrosion resistance of the alloy in the as prepared state is attributed to the increased inhomogeneity
of the alloy that coincides with the first appearance of Fe3Si phase. Further heating (up to 600 C)
resulted in an increase in the number of Fe3Si nanocrystallites and the appearance of a FeCu4 phase. After
annealing at 600 C the lowest corrosion rate, 0.004 mm a 1, was observed. Annealing of the samples at
higher temperatures (>600 C) induced formation of six crystalline phases which proved detrimental to
the corrosion resistance of the Fe73.5Cu1Nb3Si15.5B7 alloy. Solid corrosion products were identified on the
surface of the samples after anodic polarization.

Alloy XRD Raman spectroscopy Polarization Amorphous structures

http://dx.doi.org/10.1016/j.corsci.2011.03.023