Oxygen impurity improving corrosion resistance of a Zr-based bulk metallic glass in 3.5 wt% NaCl solution

J. Jiang; Z. B. Wang; S. J. Pang; Y. G. Zheng; Y. Li

doi:10.1016/j.corsci.2021.109867

Oxygen impurity improving corrosion resistance of a Zr-based bulk metallic glass in 3.5 wt% NaCl solution

J. Jiang
, Z. B. Wang^*
, S. J. Pang
, Y. G. Zheng
, Y. Li

^*Corresponding author for this work

CAS - Institute of Metal Research
University of Science and Technology of China
Beihang University

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

39 Scopus citations

Abstract

The effect of oxygen impurity on corrosion behavior of as-cast Zr₆₁Ti₂Cu₂₅Al₁₂ bulk metallic glasses (BMGs) is clarified using electrochemical measurements, microstructure characterization and surface analyses. We find unexpectedly that oxygen impurity (≤1200 ppm) improves pitting corrosion resistance when a fully amorphous structure is attained. The oxygen-induced annihilation of free volume enhances passive film protectiveness and hence accounts for the improved corrosion property. In contrast, adding more oxygen impurity (1800 ppm) deteriorates pitting corrosion resistance by assisting the formation of highly-reactive crystalline phases. The finding herein provides an avenue for designing new low-cost Zr-based BMGs with superior properties by oxygen microalloying.

Original language	English
Article number	109867
Journal	Corrosion Science
Volume	192
DOIs	https://doi.org/10.1016/j.corsci.2021.109867
State	Published - Nov 2021
Externally published	Yes

Keywords

Crystallization
Free volume
Oxygen impurity
Passive film
Pitting corrosion
Zr-based bulk metallic glass

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10.1016/j.corsci.2021.109867

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title = "Oxygen impurity improving corrosion resistance of a Zr-based bulk metallic glass in 3.5 wt\% NaCl solution",

abstract = "The effect of oxygen impurity on corrosion behavior of as-cast Zr61Ti2Cu25Al12 bulk metallic glasses (BMGs) is clarified using electrochemical measurements, microstructure characterization and surface analyses. We find unexpectedly that oxygen impurity (≤1200 ppm) improves pitting corrosion resistance when a fully amorphous structure is attained. The oxygen-induced annihilation of free volume enhances passive film protectiveness and hence accounts for the improved corrosion property. In contrast, adding more oxygen impurity (1800 ppm) deteriorates pitting corrosion resistance by assisting the formation of highly-reactive crystalline phases. The finding herein provides an avenue for designing new low-cost Zr-based BMGs with superior properties by oxygen microalloying.",

keywords = "Crystallization, Free volume, Oxygen impurity, Passive film, Pitting corrosion, Zr-based bulk metallic glass",

author = "J. Jiang and Wang, \{Z. B.\} and Pang, \{S. J.\} and Zheng, \{Y. G.\} and Y. Li",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = nov,

doi = "10.1016/j.corsci.2021.109867",

language = "英语",

volume = "192",

journal = "Corrosion Science",

issn = "0010-938X",

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TY - JOUR

T1 - Oxygen impurity improving corrosion resistance of a Zr-based bulk metallic glass in 3.5 wt% NaCl solution

AU - Jiang, J.

AU - Wang, Z. B.

AU - Pang, S. J.

AU - Zheng, Y. G.

AU - Li, Y.

PY - 2021/11

Y1 - 2021/11

N2 - The effect of oxygen impurity on corrosion behavior of as-cast Zr61Ti2Cu25Al12 bulk metallic glasses (BMGs) is clarified using electrochemical measurements, microstructure characterization and surface analyses. We find unexpectedly that oxygen impurity (≤1200 ppm) improves pitting corrosion resistance when a fully amorphous structure is attained. The oxygen-induced annihilation of free volume enhances passive film protectiveness and hence accounts for the improved corrosion property. In contrast, adding more oxygen impurity (1800 ppm) deteriorates pitting corrosion resistance by assisting the formation of highly-reactive crystalline phases. The finding herein provides an avenue for designing new low-cost Zr-based BMGs with superior properties by oxygen microalloying.

AB - The effect of oxygen impurity on corrosion behavior of as-cast Zr61Ti2Cu25Al12 bulk metallic glasses (BMGs) is clarified using electrochemical measurements, microstructure characterization and surface analyses. We find unexpectedly that oxygen impurity (≤1200 ppm) improves pitting corrosion resistance when a fully amorphous structure is attained. The oxygen-induced annihilation of free volume enhances passive film protectiveness and hence accounts for the improved corrosion property. In contrast, adding more oxygen impurity (1800 ppm) deteriorates pitting corrosion resistance by assisting the formation of highly-reactive crystalline phases. The finding herein provides an avenue for designing new low-cost Zr-based BMGs with superior properties by oxygen microalloying.

KW - Crystallization

KW - Free volume

KW - Oxygen impurity

KW - Passive film

KW - Pitting corrosion

KW - Zr-based bulk metallic glass

UR - https://www.scopus.com/pages/publications/85117147848

U2 - 10.1016/j.corsci.2021.109867

DO - 10.1016/j.corsci.2021.109867

M3 - 文章

AN - SCOPUS:85117147848

SN - 0010-938X

VL - 192

JO - Corrosion Science

JF - Corrosion Science

M1 - 109867

ER -

Oxygen impurity improving corrosion resistance of a Zr-based bulk metallic glass in 3.5 wt% NaCl solution

Abstract

Keywords

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