Electrochemical studies of amorphous, nanocrystalline, and crystalline FeSiB based alloys

Cremaschi, V.; Avram, I; Pérez, Thomas; Sirkin, H.

doi:10.1016/s1359-6462(01)01204-0

Cited by 25 publications

(7 citation statements)

References 6 publications

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“…In another study by Cremaschi et al [73] three different alloys of FeSiB were analyzed: amorphous, nanocrystalline and crystalline, by potentiodynamic anodic polarization technique in alkaline and neutral chloride media. The authors concluded that the electrochemical behaviour of the materials strongly depends on the pH of the medium.…”

Section: Complex Alloysmentioning

confidence: 99%

The corrosion behaviour of nanograined metals and alloys

Herrasti¹,

León²,

Walsh³

2012

REVMETAL

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Section: Complex Alloysmentioning

confidence: 99%

The corrosion behaviour of nanograined metals and alloys

Herrasti¹,

León²,

Walsh³

2012

REVMETAL

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“…Cremaschi et al [22] analyzed amorphous, nanocrystalline and crystalline FeSiB based alloys by means of the potentiodynamic anodic polarization technique in alkaline and neutral chloride media, studying in particular the influence on their corrosion behavior of both pH and the addition of Sn, Cu, Nb, and Al [22]. The electrochemical behavior of the materials was seen to depend heavily on the pH of the medium, with generalized corrosion occurring at neutral pH values, as opposed to a passive region followed by an abrupt increase in the current in alkaline media.…”

Section: Electrochemical Corrosion Behavior Of Nanocrystalline Materialsmentioning

confidence: 99%

Electrochemical Corrosion Behaviour of Nanocrystalline Materials

Elkedim

2008

Nanostructured Materials in Electrochemistry

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Nanocrystalline materials have received much attention as a result of their unique physical, chemical and mechanical properties, and have been the subjects of intensive research activities both in the scientific and industrial communities.Nanocrystalline materials -that is, single or multiphase polycrystalline solids with a characteristic grain size of a few nanometers -represent a promising class of new materials. Owing to the extremely small crystallite dimensions (typically 1 to 100 nm), they are characterized structurally by a large volume fraction of interfaces which may lead to improvements in a variety of properties [1].Current spending on corrosion-related problems accounts for more than 3% of the worlds gross domestic product (GDP), and characterization of the corrosion behavior of nanocrystalline materials is important both for prospective engineering applications and for a better understanding of the above fundamental physicochemical properties [2,3]. In many cases the industrial application of novel materials will ultimately depend on their corrosion resistance over extended periods of service. For this reason, corrosion problems must be considered at an appropriate stage of material development.A limited number of investigations have concentrated on the corrosion of nanocrystalline materials. Rofagha et al. [4,5] studied nanocrystalline Ni and Ni-P produced by an electrodeposition technique, whereupon the observed behaviour was considered to be consistent with substantial contributions to the bulk electrochemical behavior from the intercrystalline regions (i.e., grain boundaries and triple junctions) of these materials.Inturi and Szklarska-Smialowska [6] have observed improved localized corrosion resistance in HCl for sputter-deposited nanocrystalline type 304 stainless steel in comparison with conventional material, and attributed this to the fine grain size and homogeneity of the nanocrystalline materials. Thorpe et al. [7] studied the corrosion behavior of nanocrystalline Fe 32 Ni 36 Cr 14 P 12 B 6 alloy obtained by crystallization of the melt-spun amorphous ribbon. These authors determined that the corrosion resistance of this material was significantly greater than that of its amorphous counterpart, and attributed the improvement to the observed greater Cr enrichment of the electrochemical surface via rapid interphase boundary diffusion [8].It is difficult to predict the electrochemical behavior of nanocrystalline materials from the known properties of their coarse-grained polycrystalline analogues. Thus, several groups have observed that nanocrystalline materials exhibit enhanced oxidation and corrosion resistance compared to their conventional microcrystalline counterparts [9][10][11][12]. In contrast, results obtained in other studies have shown nanocrystalline materials to have higher rates of dissolution and corrosion [13,14].The aim of this chapter is to outline the aqueous corrosion research activities currently being undertaken on nanocrystalline materials, with key results being extrac...

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“…Some investigations have been carried out on crystallization kinetics, magnetic properties, electrochemical properties and microstructure [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%