The corrosion behavior of amorphous and nanocrystalline Fe73.5Cu1Nb3Si15.5B7 alloy

The potentiodynamic polarization curves in 0.5M 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...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion science 2011-07, Vol.53 (7), p.2400-2405
Main Authors: GAVRILOVIC, A, RAFAILOVIC, L. D, ARTNER, W, WOSIK, J, WHITEHEAD, A. H
Format: Article
Language:English
Subjects:
Annealing
Applied sciences
Corrosion
Corrosion environments
Corrosion resistance
Crystal structure
Exact sciences and technology
Heat treatment
Inhomogeneity
Metals. Metallurgy
Microstructure
Nanocrystals
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The potentiodynamic polarization curves in 0.5M 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 480A degree 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 600A degree C) resulted in an increase in the number of Fe3Si nanocrystallites and the appearance of a FeCu4 phase. After annealing at 600A degree C the lowest corrosion rate, 0.004mma-1, was observed. Annealing of the samples at higher temperatures (>600A degree 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.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2011.03.023