Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion

Wande Cairang; Tianshu Li; Dezhen Xue; Hejie Yang; Pengming Cheng; Can Chen; Yuanjun Sun; Yi Zeng; Xiangdong Ding; Jun Sun

doi:10.1016/j.corsci.2021.109469

Enhancement of the corrosion resistance of Molybdenum by La₂O₃ dispersion

Wande Cairang
, Tianshu Li
, Dezhen Xue
, Hejie Yang
, Pengming Cheng
, Can Chen
, Yuanjun Sun
, Yi Zeng
, Xiangdong Ding
, Jun Sun

School of Materials Science and Engineering

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

26 Scopus citations

Abstract

The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.% La₂O₃ was investigated in aerated 3.5 wt.% NaCl at 25 °C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2∼3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La₂O₃, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.

Original language	English
Article number	109469
Journal	Corrosion Science
Volume	186
DOIs	https://doi.org/10.1016/j.corsci.2021.109469
State	Published - 1 Jul 2021

Keywords

Corrosion behavior
Microstructure
Molybdenum
Oxide film
Rare earth doping

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10.1016/j.corsci.2021.109469

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title = "Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion",

abstract = "The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.\% La2O3 was investigated in aerated 3.5 wt.\% NaCl at 25 °C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2∼3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La2O3, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.",

keywords = "Corrosion behavior, Microstructure, Molybdenum, Oxide film, Rare earth doping",

author = "Wande Cairang and Tianshu Li and Dezhen Xue and Hejie Yang and Pengming Cheng and Can Chen and Yuanjun Sun and Yi Zeng and Xiangdong Ding and Jun Sun",

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doi = "10.1016/j.corsci.2021.109469",

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TY - JOUR

T1 - Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion

AU - Cairang, Wande

AU - Li, Tianshu

AU - Xue, Dezhen

AU - Yang, Hejie

AU - Cheng, Pengming

AU - Chen, Can

AU - Sun, Yuanjun

AU - Zeng, Yi

AU - Ding, Xiangdong

AU - Sun, Jun

PY - 2021/7/1

Y1 - 2021/7/1

N2 - The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.% La2O3 was investigated in aerated 3.5 wt.% NaCl at 25 °C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2∼3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La2O3, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.

AB - The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.% La2O3 was investigated in aerated 3.5 wt.% NaCl at 25 °C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2∼3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La2O3, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.

KW - Corrosion behavior

KW - Microstructure

KW - Molybdenum

KW - Oxide film

KW - Rare earth doping

UR - https://www.scopus.com/pages/publications/85104587465

U2 - 10.1016/j.corsci.2021.109469

DO - 10.1016/j.corsci.2021.109469

M3 - 文章

AN - SCOPUS:85104587465

SN - 0010-938X

VL - 186

JO - Corrosion Science

JF - Corrosion Science

M1 - 109469

ER -

Enhancement of the corrosion resistance of Molybdenum by La₂O₃ dispersion

Abstract

Keywords

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