Anodic behaviour of Fe73.5Si13.5-xAlxB9Nb3Cu1 (X = 0-2) amorphous, nanostructured and crystalline alloys

Amorphous FeSiAlBNbCu alloys passivate in 1M NaCl, pH=9, solution owing to the formation of a silicon-enriched surface film. The heterogeneous microstructure formed by primary and secondary crystalliation has a deleterious effect on the stability of the passive film. The partial replacement of silic...

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Bibliographic Details
Published in:Scripta materialia 2001-03, Vol.44 (3), p.507-512
Main Authors: ALVAREZ, M. G, VAZQUEZ, S. M, MOYA, J, SIRKIN, H
Format: Article
Language:English
Subjects:
Applied sciences
Chemical and electrochemical properties
Exact sciences and technology
Metals. Metallurgy
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Summary:Amorphous FeSiAlBNbCu alloys passivate in 1M NaCl, pH=9, solution owing to the formation of a silicon-enriched surface film. The heterogeneous microstructure formed by primary and secondary crystalliation has a deleterious effect on the stability of the passive film. The partial replacement of silicon by aluminum (at least up to 2% Al) has no significant effect on the polarisation behavior of the alloys in the amorphous and devitrified states. A good correlation is found between the microstructural changes and the electrochemical response of FeSiAlBNbCu alloys.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(00)00627-8