Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid

Chen Zhang; Yunping Li; Yuhang Hou; Ning Tang; Kazuyo Ohmura; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2014.08.010

Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid

Chen Zhang, Yunping Li, Yuhang Hou, Ning Tang, Kazuyo Ohmura, Yuichiro Koizumi, Akihiko Chiba

Materials Processing and Characterization Division

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

23 Citations (Scopus)

Abstract

The effect of Cu and Fe addition on the corrosion resistance of Ni-30Co-16Cr-15Mo in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observation revealed that adding 15. wt.% Fe gives rise to a significantly deteriorated corrosion resistance that is characterized by preferential dissolution along grain boundaries, especially in cold-forged sample. Meanwhile, alloy modified with 15. wt.% Fe and 2. wt.% Cu exhibited a tremendous improvement in corrosion resistance, even after cold forging. This is probably attributed to the rapid formation of a Cu-rich passive film, which is ascribable to the noble nature and high reorganising ability of Cu.

Original language	English
Pages (from-to)	81-92
Number of pages	12
Journal	Corrosion Science
Volume	89
Issue number	C
DOIs	https://doi.org/10.1016/j.corsci.2014.08.010
Publication status	Published - 2014

Keywords

Acid corrosion
Cobalt
Nickel
Passive films
SEM
XRD

ASJC Scopus subject areas

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

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10.1016/j.corsci.2014.08.010

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title = "Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid",

abstract = "The effect of Cu and Fe addition on the corrosion resistance of Ni-30Co-16Cr-15Mo in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observation revealed that adding 15. wt.% Fe gives rise to a significantly deteriorated corrosion resistance that is characterized by preferential dissolution along grain boundaries, especially in cold-forged sample. Meanwhile, alloy modified with 15. wt.% Fe and 2. wt.% Cu exhibited a tremendous improvement in corrosion resistance, even after cold forging. This is probably attributed to the rapid formation of a Cu-rich passive film, which is ascribable to the noble nature and high reorganising ability of Cu.",

keywords = "Acid corrosion, Cobalt, Nickel, Passive films, SEM, XRD",

author = "Chen Zhang and Yunping Li and Yuhang Hou and Ning Tang and Kazuyo Ohmura and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: This research was mainly supported by a Regional Innovation Cluster Program 2010 of the Ministry of Education, Culture, Sports, Science and Technology of Japan. Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd.",

year = "2014",

doi = "10.1016/j.corsci.2014.08.010",

language = "English",

volume = "89",

pages = "81--92",

journal = "Corrosion Science",

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T1 - Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid

AU - Zhang, Chen

AU - Li, Yunping

AU - Hou, Yuhang

AU - Tang, Ning

AU - Ohmura, Kazuyo

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

N1 - Funding Information: This research was mainly supported by a Regional Innovation Cluster Program 2010 of the Ministry of Education, Culture, Sports, Science and Technology of Japan. Publisher Copyright: © 2014 Elsevier Ltd.

PY - 2014

Y1 - 2014

N2 - The effect of Cu and Fe addition on the corrosion resistance of Ni-30Co-16Cr-15Mo in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observation revealed that adding 15. wt.% Fe gives rise to a significantly deteriorated corrosion resistance that is characterized by preferential dissolution along grain boundaries, especially in cold-forged sample. Meanwhile, alloy modified with 15. wt.% Fe and 2. wt.% Cu exhibited a tremendous improvement in corrosion resistance, even after cold forging. This is probably attributed to the rapid formation of a Cu-rich passive film, which is ascribable to the noble nature and high reorganising ability of Cu.

AB - The effect of Cu and Fe addition on the corrosion resistance of Ni-30Co-16Cr-15Mo in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observation revealed that adding 15. wt.% Fe gives rise to a significantly deteriorated corrosion resistance that is characterized by preferential dissolution along grain boundaries, especially in cold-forged sample. Meanwhile, alloy modified with 15. wt.% Fe and 2. wt.% Cu exhibited a tremendous improvement in corrosion resistance, even after cold forging. This is probably attributed to the rapid formation of a Cu-rich passive film, which is ascribable to the noble nature and high reorganising ability of Cu.

KW - Acid corrosion

KW - Cobalt

KW - Nickel

KW - Passive films

KW - SEM

KW - XRD

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DO - 10.1016/j.corsci.2014.08.010

M3 - Article

AN - SCOPUS:85027936401

VL - 89

SP - 81

EP - 92

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

IS - C

ER -

Corrosion resistance of Cu- and Fe-modified Ni-30Co-16Cr-15Mo alloy in aqueous hydrofluoric acid

Abstract

Keywords

ASJC Scopus subject areas

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