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Corrosion behaviour of an Fe3Al-type intermetallic in a chloride containing solution

AuthorsGarcía-Alonso, M. C.; López, María Francisca ; Escudero Rincón, María Lorenza; González-Carrasco, José Luis; Morris, David G.
Issue DateFeb-1999
CitationIntermetallics 7(2): 185-191 (1999)
AbstractThe corrosion behaviour of an Fe3Al-base intermetallic compound with different crystal structures in a chloride containing solution has been investigated. The corrosion current densities of this intermetallic were independent of the material crystal structure showing a passive state stable with time. These corrosion rates were of the same order of magnitude as for 316L stainless steel. The pitting corrosion resistance evaluated by means of cyclic anodic polarization curves was high for all different states. Amongst the different crystal structures of this intermetallic alloy, the two ordered states present the lowest pitting probability. This Fe3Al intermetallic shows higher pitting corrosion resistance than the 316L stainless steel but its capacity for repassivation is lower. A damaging factor of influence on the pitting corrosion behaviour is the presence of non-metallic inclusions on the surface which reduce the pitting corrosion resistance by almost a half. © 1999 Elsevier Science Ltd. All rights reserved.
Publisher version (URL)https://doi.org/10.1016/S0966-9795(98)00021-1
Identifiersissn: 0966-9795
Appears in Collections:(CENIM) Artículos
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