The corrosion behaviour of Zr-based bulk metallic glasses in 0.5M NaCl solution

Asahi Kawashima; Kazuyo Ohmura; Yoshihiko Yokoyama; Akihisa Inoue

doi:10.1016/j.corsci.2011.05.014

The corrosion behaviour of Zr-based bulk metallic glasses in 0.5M NaCl solution

Asahi Kawashima, Kazuyo Ohmura, Yoshihiko Yokoyama, Akihisa Inoue

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

The corrosion behaviour of eutectic Zr₅₀Cu₄₀Al₁₀ and hypoeutectic Zr₇₀Cu₆Al₈Ni₁₆ bulk metallic glasses (BMGs) was studied by electrochemical measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Zr₅₀Cu₄₀Al₁₀ BMG was highly susceptible to pitting corrosion in naturally aerated 0.5M NaCl solution at 30°C. In contrast, Zr₇₀Cu₆Al₈Ni₁₆ BMG passivated spontaneously under the same condition. EDX results for Zr₅₀Cu₄₀Al₁₀ indicated that enrichment of Cu, Cl and O occurred in the pitted region, while for Zr₇₀Cu₆Al₈Ni₁₆ BMG, no significant difference was found in the surface composition from the specimens before and after immersion in the solution. XPS analysis including angle-resolved measurements for Zr₇₀Cu₆Al₈Ni₁₆ BMG revealed that zirconium cation (Zr⁴⁺) was highly concentrated in both air-formed and passive films. Furthermore, the concentration of Zr⁴⁺ ions after immersion for 24h or more showed tendency to increase with decreasing take-off angle, indicating that the exterior part of the passive film consisted exclusively of zirconium oxyhydroxide. The high corrosion resistance of Zr₇₀Cu₆Al₈Ni₁₆ BMG was attributed to the formation of homogeneous and stable passive film enriched with zirconium.

Original language	English
Pages (from-to)	2778-2784
Number of pages	7
Journal	Corrosion Science
Volume	53
Issue number	9
DOIs	https://doi.org/10.1016/j.corsci.2011.05.014
Publication status	Published - 2011 Sept
Externally published	Yes

Keywords

A. Alloy
B. SEM
B. XPS
C. Passive films
C. Pitting corrosion

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2011.05.014

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@article{082709c6e6744a41808fd27f0ca8b8f4,

title = "The corrosion behaviour of Zr-based bulk metallic glasses in 0.5M NaCl solution",

abstract = "The corrosion behaviour of eutectic Zr50Cu40Al10 and hypoeutectic Zr70Cu6Al8Ni16 bulk metallic glasses (BMGs) was studied by electrochemical measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Zr50Cu40Al10 BMG was highly susceptible to pitting corrosion in naturally aerated 0.5M NaCl solution at 30°C. In contrast, Zr70Cu6Al8Ni16 BMG passivated spontaneously under the same condition. EDX results for Zr50Cu40Al10 indicated that enrichment of Cu, Cl and O occurred in the pitted region, while for Zr70Cu6Al8Ni16 BMG, no significant difference was found in the surface composition from the specimens before and after immersion in the solution. XPS analysis including angle-resolved measurements for Zr70Cu6Al8Ni16 BMG revealed that zirconium cation (Zr4+) was highly concentrated in both air-formed and passive films. Furthermore, the concentration of Zr4+ ions after immersion for 24h or more showed tendency to increase with decreasing take-off angle, indicating that the exterior part of the passive film consisted exclusively of zirconium oxyhydroxide. The high corrosion resistance of Zr70Cu6Al8Ni16 BMG was attributed to the formation of homogeneous and stable passive film enriched with zirconium.",

keywords = "A. Alloy, B. SEM, B. XPS, C. Passive films, C. Pitting corrosion",

author = "Asahi Kawashima and Kazuyo Ohmura and Yoshihiko Yokoyama and Akihisa Inoue",

note = "Funding Information: The authors thank Professor K. Hashimoto at Tohoku Institute of Technology for help in preparing the manuscript. This work was financially supported in part by Grant-in-Aid for Scientific Research (C) No. 20560644 from Japan Society for the Promotion of Science (JSPS) and by Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials from The Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. This work was a cooperative program of the ARCMG-IMR, Tohoku University.",

year = "2011",

month = sep,

doi = "10.1016/j.corsci.2011.05.014",

language = "English",

volume = "53",

pages = "2778--2784",

journal = "Corrosion Science",

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T1 - The corrosion behaviour of Zr-based bulk metallic glasses in 0.5M NaCl solution

AU - Kawashima, Asahi

AU - Ohmura, Kazuyo

AU - Yokoyama, Yoshihiko

AU - Inoue, Akihisa

N1 - Funding Information: The authors thank Professor K. Hashimoto at Tohoku Institute of Technology for help in preparing the manuscript. This work was financially supported in part by Grant-in-Aid for Scientific Research (C) No. 20560644 from Japan Society for the Promotion of Science (JSPS) and by Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials from The Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. This work was a cooperative program of the ARCMG-IMR, Tohoku University.

PY - 2011/9

Y1 - 2011/9

N2 - The corrosion behaviour of eutectic Zr50Cu40Al10 and hypoeutectic Zr70Cu6Al8Ni16 bulk metallic glasses (BMGs) was studied by electrochemical measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Zr50Cu40Al10 BMG was highly susceptible to pitting corrosion in naturally aerated 0.5M NaCl solution at 30°C. In contrast, Zr70Cu6Al8Ni16 BMG passivated spontaneously under the same condition. EDX results for Zr50Cu40Al10 indicated that enrichment of Cu, Cl and O occurred in the pitted region, while for Zr70Cu6Al8Ni16 BMG, no significant difference was found in the surface composition from the specimens before and after immersion in the solution. XPS analysis including angle-resolved measurements for Zr70Cu6Al8Ni16 BMG revealed that zirconium cation (Zr4+) was highly concentrated in both air-formed and passive films. Furthermore, the concentration of Zr4+ ions after immersion for 24h or more showed tendency to increase with decreasing take-off angle, indicating that the exterior part of the passive film consisted exclusively of zirconium oxyhydroxide. The high corrosion resistance of Zr70Cu6Al8Ni16 BMG was attributed to the formation of homogeneous and stable passive film enriched with zirconium.

AB - The corrosion behaviour of eutectic Zr50Cu40Al10 and hypoeutectic Zr70Cu6Al8Ni16 bulk metallic glasses (BMGs) was studied by electrochemical measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Zr50Cu40Al10 BMG was highly susceptible to pitting corrosion in naturally aerated 0.5M NaCl solution at 30°C. In contrast, Zr70Cu6Al8Ni16 BMG passivated spontaneously under the same condition. EDX results for Zr50Cu40Al10 indicated that enrichment of Cu, Cl and O occurred in the pitted region, while for Zr70Cu6Al8Ni16 BMG, no significant difference was found in the surface composition from the specimens before and after immersion in the solution. XPS analysis including angle-resolved measurements for Zr70Cu6Al8Ni16 BMG revealed that zirconium cation (Zr4+) was highly concentrated in both air-formed and passive films. Furthermore, the concentration of Zr4+ ions after immersion for 24h or more showed tendency to increase with decreasing take-off angle, indicating that the exterior part of the passive film consisted exclusively of zirconium oxyhydroxide. The high corrosion resistance of Zr70Cu6Al8Ni16 BMG was attributed to the formation of homogeneous and stable passive film enriched with zirconium.

KW - A. Alloy

KW - B. SEM

KW - B. XPS

KW - C. Passive films

KW - C. Pitting corrosion

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DO - 10.1016/j.corsci.2011.05.014

M3 - Article

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SN - 0010-938X

VL - 53

SP - 2778

EP - 2784

JO - Corrosion Science

JF - Corrosion Science

IS - 9

ER -

The corrosion behaviour of Zr-based bulk metallic glasses in 0.5M NaCl solution

Abstract

Keywords

ASJC Scopus subject areas

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