Effect of crystalline structure on the corrosion behavior of the Co-Cr-Mo alloy in 2.5 M H2SO4 + 0.2 M NaCl solution

Daichi Nakato; Masahiko Hatakeyama; Norio Nunomura; Satoshi Sunada

doi:10.1016/j.corsci.2023.111471

Effect of crystalline structure on the corrosion behavior of the Co-Cr-Mo alloy in 2.5 M H₂SO₄ + 0.2 M NaCl solution

Daichi Nakato, Masahiko Hatakeyama^*, Norio Nunomura, Satoshi Sunada

^*Corresponding author for this work

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

1 Scopus citations

Abstract

Corrosion behaviors of Co-Cr-Mo alloys with fcc and hcp structures, respectively, were investigated by polarization tests and weight-loss method in 2.5 M H₂SO₄ + 0.2 M NaCl solution. Samples were heat treated and single-phase fcc samples, single-phase hcp samples and mixed-phase samples were obtained. Polarization tests and weight-loss method shows that the fcc Co-Cr-Mo alloy has better corrosion-resistant characteristic than the hcp Co-Cr-Mo alloy. It was also revealed that similar corrosion-resistant characteristic to the fcc single-phase was obtained even in a Co-Cr-Mo alloy having a mixed composition of the dominant fcc phase and a small amount of the hcp phase.

Original language	English
Article number	111471
Journal	Corrosion Science
Volume	223
DOIs	https://doi.org/10.1016/j.corsci.2023.111471
State	Published - 2023/10

Keywords

Cobalt-chromium-molybdenum alloy
Corrosion
Polarization test

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

Access to Document

10.1016/j.corsci.2023.111471

Cite this

@article{153e3fdc9f2c435db056d31331774d34,

title = "Effect of crystalline structure on the corrosion behavior of the Co-Cr-Mo alloy in 2.5 M H2SO4 + 0.2 M NaCl solution",

abstract = "Corrosion behaviors of Co-Cr-Mo alloys with fcc and hcp structures, respectively, were investigated by polarization tests and weight-loss method in 2.5 M H2SO4 + 0.2 M NaCl solution. Samples were heat treated and single-phase fcc samples, single-phase hcp samples and mixed-phase samples were obtained. Polarization tests and weight-loss method shows that the fcc Co-Cr-Mo alloy has better corrosion-resistant characteristic than the hcp Co-Cr-Mo alloy. It was also revealed that similar corrosion-resistant characteristic to the fcc single-phase was obtained even in a Co-Cr-Mo alloy having a mixed composition of the dominant fcc phase and a small amount of the hcp phase.",

keywords = "Cobalt-chromium-molybdenum alloy, Corrosion, Polarization test",

author = "Daichi Nakato and Masahiko Hatakeyama and Norio Nunomura and Satoshi Sunada",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = oct,

doi = "10.1016/j.corsci.2023.111471",

language = "英語",

volume = "223",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Effect of crystalline structure on the corrosion behavior of the Co-Cr-Mo alloy in 2.5 M H2SO4 + 0.2 M NaCl solution

AU - Nakato, Daichi

AU - Hatakeyama, Masahiko

AU - Nunomura, Norio

AU - Sunada, Satoshi

PY - 2023/10

Y1 - 2023/10

N2 - Corrosion behaviors of Co-Cr-Mo alloys with fcc and hcp structures, respectively, were investigated by polarization tests and weight-loss method in 2.5 M H2SO4 + 0.2 M NaCl solution. Samples were heat treated and single-phase fcc samples, single-phase hcp samples and mixed-phase samples were obtained. Polarization tests and weight-loss method shows that the fcc Co-Cr-Mo alloy has better corrosion-resistant characteristic than the hcp Co-Cr-Mo alloy. It was also revealed that similar corrosion-resistant characteristic to the fcc single-phase was obtained even in a Co-Cr-Mo alloy having a mixed composition of the dominant fcc phase and a small amount of the hcp phase.

AB - Corrosion behaviors of Co-Cr-Mo alloys with fcc and hcp structures, respectively, were investigated by polarization tests and weight-loss method in 2.5 M H2SO4 + 0.2 M NaCl solution. Samples were heat treated and single-phase fcc samples, single-phase hcp samples and mixed-phase samples were obtained. Polarization tests and weight-loss method shows that the fcc Co-Cr-Mo alloy has better corrosion-resistant characteristic than the hcp Co-Cr-Mo alloy. It was also revealed that similar corrosion-resistant characteristic to the fcc single-phase was obtained even in a Co-Cr-Mo alloy having a mixed composition of the dominant fcc phase and a small amount of the hcp phase.

KW - Cobalt-chromium-molybdenum alloy

KW - Corrosion

KW - Polarization test

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U2 - 10.1016/j.corsci.2023.111471

DO - 10.1016/j.corsci.2023.111471

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