On the passivation characteristics of a β-FeAl intermetallic compound in sulphate solutions

Frangini, S.; Cristofaro, N. De; Lascovich, J.; Mignone, A.

doi:10.1016/0010-938x(93)90145-7

Cited by 38 publications

(15 citation statements)

References 8 publications

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“…Combined eects of Fe and Al seem to bene®t iron aluminides. Thus assisted by Al, aluminides undergo less active dissolution due to formation of Al 2 O 3 ®lm, than iron before they passivated and once they reach the passive state, the presence of iron oxide provide an additional resistance to the passage of current through aluminium oxide ®lm (it is know that Al forms porous [15]. Their studies show that the alloys exhibit similar passivation behaviour, irrespective to the concentration of acid.…”

Section: à7mentioning

confidence: 79%

“…Furthermore, the i pass value of FeAl has reported around 20 lA cm À2 [14,15]. While, the i pass value of present alloys varies from 34.25 to 85:11 lA cm À2 .…”

Section: à7mentioning

confidence: 99%

“…Though, Frangini et al [14,15] did not report the existence of secondary anodic peak in FeAl, several such observation are made in literature with respect to stainless steels [18±21]. Rockel discusses in detail the possible causes for the appearance of secondary anodic peak in sensitized chromium steels in 1 N H 2 SO 4 [18].…”

Section: à7mentioning

confidence: 99%

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Effect of carbon on corrosion behaviour of Fe3Al intermetallics in 0.5 N sulphuric acid

2002

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Section: à7mentioning

confidence: 79%

“…Furthermore, the i pass value of FeAl has reported around 20 lA cm À2 [14,15]. While, the i pass value of present alloys varies from 34.25 to 85:11 lA cm À2 .…”

Section: à7mentioning

confidence: 99%

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Effect of carbon on corrosion behaviour of Fe3Al intermetallics in 0.5 N sulphuric acid

2002

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“…The exact composition has been given elsewhere. 2 The samples were ground with 600 S i c paper in anhydrous ethyl alcohol followed by polishing up to 1 micron with diamond paste.…”

Section: Experimental Electrochemical Treatmentmentioning

confidence: 99%

XPS study of passive films formed on an iron—aluminium intermetallic compound in acid solution

Frangini

Giorgi

Lascovich

et al. 1994

Surface & Interface Analysis

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Surface films grown on the intermetallic B2-FeAI alloy after wet-mechanical polishing and after a wide range of anodic polarization conditions in 1N H2S04 have been analysed by x-ray photoeleclron spectroscopy. The results clearly indicate a remarkable enrichment of aluminium within all the films regardlless of the growth conditions. Analysis of the metal-oxygen bonds has made it possible to distinguish several oxidized species. It has been found that most of the iron hydroxides are concentrated on the film surfaces, whereas aluminium hydroxides appear more homogeneously distributed over the depth of the oxide films. The thickness of the film shows an abrupt increase at 1 V, accompanied by a marked increment of A1 hydroxide species.

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“…A Pourbaix diagram of aluminum [128] provides information about the thermodynamic stability of different species as a function of potential and pH (Figure 15). At room temperatures and in near-neutral and Cl´-free solutions, aluminum provides a protective insoluble oxide/hydroxide film [129][130][131]. However, the range of passivity varies with temperature, presence of secondary phases and/or precipitates (in bulk material and/or the oxide layer) and existence of substances in the solution that can form soluble complexes or insoluble salts with aluminum [132,133].…”

Section: Electrochemical Properties Of Fe-al Intermetallicsmentioning

confidence: 99%

A Review on the Properties of Iron Aluminide Intermetallics

2016

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Iron aluminides have been among the most studied intermetallics since the 1930s, when their excellent oxidation resistance was first noticed. Their low cost of production, low density, high strength-to-weight ratios, good wear resistance, ease of fabrication and resistance to high temperature oxidation and sulfurization make them very attractive as a substitute for routine stainless steel in industrial applications. Furthermore, iron aluminides allow for the conservation of less accessible and expensive elements such as nickel and molybdenum. These advantages have led to the consideration of many applications, such as brake disks for windmills and trucks, filtration systems in refineries and fossil power plants, transfer rolls for hot-rolled steel strips, and ethylene crackers and air deflectors for burning high-sulfur coal. A wide application for iron aluminides in industry strictly depends on the fundamental understanding of the influence of (i) alloy composition; (ii) microstructure; and (iii) number (type) of defects on the thermo-mechanical properties. Additionally, environmental degradation of the alloys, consisting of hydrogen embrittlement, anodic or cathodic dissolution, localized corrosion and oxidation resistance, in different environments should be well known. Recently, some progress in the development of new micro-and nano-mechanical testing methods in addition to the fabrication techniques of micro-and nano-scaled samples has enabled scientists to resolve more clearly the effects of alloying elements, environmental items and crystal structure on the deformation behavior of alloys. In this paper, we will review the extensive work which has been done during the last decades to address each of the points mentioned above.

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On the passivation characteristics of a β-FeAl intermetallic compound in sulphate solutions

Cited by 38 publications

References 8 publications

Effect of carbon on corrosion behaviour of Fe3Al intermetallics in 0.5 N sulphuric acid

Effect of carbon on corrosion behaviour of Fe3Al intermetallics in 0.5 N sulphuric acid

XPS study of passive films formed on an iron—aluminium intermetallic compound in acid solution

A Review on the Properties of Iron Aluminide Intermetallics

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