Corrosion behavior of Zr–Cu–Ni–Al bulk metallic glasses in chloride medium

Tauseef, A.; Tariq, N.H.; Akhter, J.I.; Hasan, B.A.; Mehmood, Mazhar

doi:10.1016/j.jallcom.2009.09.119

Cited by 26 publications

(3 citation statements)

References 13 publications

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“…The hemispherical shape and the occluded condition suggest that early pits on Zr-Cu-based metallic glasses grow under mass transport control. 39,[45][46][47] If the pits are allowed to grow further, either by simply keeping the sample immersed, 9,40,42 or by increasing 3,4,7,19,48,49 or decreasing polarization (performed in this work) once E P is reached, their morphology becomes more complex. They develop an irregular shape with deep holes and often a porous rim.…”

Section: Discussionmentioning

confidence: 99%

Comparing the pitting corrosion behavior of prominent Zr-based bulk metallic glasses

et al. 2014

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Five well-known Zr-based alloys of the systems Zr-Cu-Al-(Ni-Nb, Ni-Ti, Ag) (Cu 5 15.4-36 at.%) with the highest glass-forming ability were comparatively analyzed regarding their pitting corrosion resistance and repassivation ability in a chloride-containing solution. Potentiodynamic polarization measurements were conducted in the neutral 0.01 M Na 2 SO 4 1 0.1 M NaCl electrolyte and local corrosion damages were subsequently investigated with high resolution scanning electron microscopy (HR-SEM) coupled with energy dispersive x-ray spectroscopy (EDX). Both pitting and repassivation potential correlate with the Cu concentration, i.e., those potentials decrease with increasing Cu content. Pit morphology is not composition dependent: while initially hemispherical pits then develop an irregular shape and a porous rim. Corrosion products are rich in Cu, O, and often Cl species. A combination of low Cu and high Nb or Ti contents is most beneficial for a high pitting resistance of Zr-based bulk metallic glasses. The bulk glassy Zr 57 Cu 15.4 Al 10 Ni 12.6 Nb 5 (Vit 106) and Zr 52.5 Cu 17.9 Al 10 Ni 14.6 Ti 5 (Vit 105) alloys exhibit the highest pitting resistance.

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Section: Discussionmentioning

confidence: 99%

Comparing the pitting corrosion behavior of prominent Zr-based bulk metallic glasses

et al. 2014

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“…It suggests that the corrosion of the specimen inside progressed through the pits formed at the surface. The porous structure covered with a lacy film was reported for the corrosions of ZrCu-base amorphous alloys 4,10) and for stainless steels. 11,12) It was reported that a multilayered structure with ZrO 2 and metallic Cu was formed at the surfaces of a-Zr 40 Cu 60 kept in air.…”

Section: Methodsmentioning

confidence: 79%

Dissolved-Oxygen-Induced Intensive Pitting Corrosion of Amorphous ZrCu Alloys in Thin NaCl Solutions

et al. 2011

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Intensive pitting corrosion of amorphous (a-) Zr 55 Cu 45 and a-Zr 50 Cu 50 were observed by immersion in 0.2-200 mM NaCl solutions open to air at room temperature. The decreased corrosion rate in Ar-purged NaCl solution and no corrosion in ultrapure water open to air suggested that dissolved O 2 and Cl À played an important role on the corrosion of the ZrCu-base amorphous alloys. The open-circuit potential showed a negative shift with increasing the NaCl concentration from 0.2 to 200 mM like that of pure Cu. These observations suggest that the corrosion of the ZrCu-base amorphous alloys in the NaCl solutions was triggered by Cu dissolution which was induced by the reduction of dissolved O 2 . The dissolution of Cu and Zr self-catalytically progressed by the local concentration of Cl À and hence the corrosion pits and holes were intensively formed even at the thinner NaCl concentrations.

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“…In the scratched oxide film, defects are absorbed by the anions, leading to anodic dissolution on the bare alloy surface. In the protective area of the oxide film, the cathode reaction occurs, and can be written as [ 25 ]. 2H 2 O + O 2 + 4e = 4OH − (pH ≥ 7) …”

Section: Resultsmentioning

confidence: 99%

Versatile Medium Entropy Ti-Based Bulk Metallic Glass Composites

Liu

Zhao

et al. 2022

Materials

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An ultra-strong Ti-based bulk metallic glass composite was developed via the transformation-induced plasticity (TRIP) effect to enhance both the ductility and work-hardening capability of the amorphous matrix. The functionally graded composites with a continuous gradient microstructure were obtained. It was found that the austenitic center possesses good plasticity and toughness. Furthermore, the amorphous surface exhibited high strength and hardness, as well as excellent wear corrosion resistance. Compared with the Ti-6Al-4V alloy, bulk metallic glass composites (BMGCs) exhibit better spontaneous passivation behavior during the potential dynamic polarization. No crystallization was observed on the friction surface, indicating their good friction-reduction and anti-wear properties.

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Corrosion behavior of Zr–Cu–Ni–Al bulk metallic glasses in chloride medium

Cited by 26 publications

References 13 publications

Comparing the pitting corrosion behavior of prominent Zr-based bulk metallic glasses

Comparing the pitting corrosion behavior of prominent Zr-based bulk metallic glasses

Dissolved-Oxygen-Induced Intensive Pitting Corrosion of Amorphous ZrCu Alloys in Thin NaCl Solutions

Versatile Medium Entropy Ti-Based Bulk Metallic Glass Composites

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