Hot water corrosion behaviour of Zr–Cu–Al–Ni bulk metallic glass

Gebert, A.; Buchholz, Kami; El-Aziz, A. M.; Eckert, J.

doi:10.1016/s0921-5093(01)01248-5

Cited by 31 publications

(18 citation statements)

References 10 publications

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“…These deficiencies may adversely affect the corrosion resistance of the ribbons. In the case of the BMG, its corrosion resistance is reported to be affected by partial crystallinity [14,15] and compositional inhomogeneity. [26] During the production of BMG by copper mold casting, the peripheral region of the BMG is in contact with the copper mold.…”

Section: Discussionmentioning

confidence: 99%

“…In the 0.05 M Na 2 SO 4 solution, the amorphous specimen exhibited passive behavior at the natural corrosion potential, with the very low corrosion penetration rate of 0.4 lm/yr, without showing any susceptibility to pitting corrosion. According to Gebert et al, [14,15] the susceptibility to pitting corrosion of Zr 41.2 Ti 13.8 Cu 12 Ni 10 Be 22.5 (BMG) in the NaCl solution was due to the existence of micrometer-sized crystalline inclusions that were embedded in the amorphous matrix. Chloride attack is higher at the interface between the crystalline phases and the amorphous phase.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Structural Defects, Surface Irregularities, and Quenched-In Defects on Corrosion of Zr-Based Metallic Glasses

Vishwanadh

Abraham

Jagannath

et al. 2009

Metall Mater Trans A

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X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) revealed a fully amorphous structure for as-cast bulk metallic glass (BMG) and melt-spun ribbons of Zr 52 Ti 6 Al 10 Cu 18 Ni 14 prepared by copper mold casting and the melt-spinning technique, respectively. For melt-spun ribbons, the wheel-side surface contained a higher concentration of quenched-in defects (air pockets), whereas surface irregularities were noticed in the air side. Fluctuation microscopy indicated more medium-range order for the as-cast structure of BMG than for the melt-spun ribbon, whereas in the BMG, the medium-range order was located more in the central region than in the periphery. Macro-and microcell electrochemical experiments of the BMG along the cross section and macrocell experiments of each side of the ribbons in dilute acidic chloride environments indicated that the corrosion resistance of the BMG decreased with the increase in the medium-range order; the medium-range order, however, was less deleterious than either the surface irregularities or the quenched-in defects from the viewpoint of corrosion. A surface film formed on the metallic glasses in a dilute acidic chloride environment mainly consisted of oxide of zirconium, in which zirconium was present in the Zr +3 , Zr +2 , and Zr + 1 state in the BMG and in the air-side and wheel-side surfaces, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Structural Defects, Surface Irregularities, and Quenched-In Defects on Corrosion of Zr-Based Metallic Glasses

Vishwanadh

Abraham

Jagannath

et al. 2009

Metall Mater Trans A

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“…The Zr-MG reveals to increase in passive current density and decrease of transpassive potential with increase in nitric acidic concentration [51]. Gebert et al [50,55] Table 2. Summary of corrosion parameters for some metallic glasses in different corrosive environment.…”

Section: Effect Of Environmentmentioning

confidence: 99%

Corrosion Resistance and Electrocatalytic Properties of Metallic Glasses

Wang¹

2016

Metallic Glasses - Formation and Properties

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Metallic glasses exhibit excellent corrosion resistance and electrocatalytic properties, and present extensive potential applications as anticorrosion, antiwearing, and catalysis materials in many industries. The effects of minor alloying element, microstructure, and service environment on the corrosion resistance, pitting corrosion, and electrocatalytic efficiency of metallic glasses are reviewed. Some scarcities in corrosion behaviors, pitting mechanism, and eletrocatalytic reactive activity for hydrogen are discussed. It is hoped that the overview is beneficial for some researcher paying attention to metallic glasses.

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“…However, these applications require also a high chemical stability under sometimes even severe environmental conditions. A number of corrosion studies have already been reported for multicomponent Zr-based metallic glasses in different corrosive media [6][7][8]. In general, the Zr-based metallic glasses exhibit a high corrosion resistance in strong acids (i.e., H 2 SO 4 and HNO 3 ) and alkalies (i.e., NaOH) due to their chemical and structural homogeneity, which enables the formation of uniform highly protective passive films [7].…”

Section: Introductionmentioning

confidence: 99%

“…halides like F − and Cl − ). This is attributed to the high pitting susceptibility of the main component zirconium [6,9]. It has been reported for the example of the Zr 59 Ti 3 Cu 20 Al 10 Ni 8 bulk metallic glass that a typical wide "honeycomb micromesh" region forms at the center regions of the pits in 1N H 2 SO 4 containing 0.01-0.2 N NaCl, which is related to a local selective dissolution of the less noble alloying components (i.e., Zr and Al) [9].…”

Section: Introductionmentioning

confidence: 99%