Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid

Yunping Li; Xiuru Fan; Ning Tang; Huakang Bian; Yuhang Hou; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2013.09.004

Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid

Yunping Li, Xiuru Fan, Ning Tang, Huakang Bian, Yuhang Hou, Yuichiro Koizumi, Akihiko Chiba

研究成果: Article › 査読

25 被引用数 (Scopus)

抄録

This study examined the effect of partially substituting cobalt for nickel in Ni-16Cr-15Mo alloy on corrosion resistance to 5.2. M HF acid solution at 100. °C. Microstructural characterisations revealed that cobalt substitution did not have a detrimental effect on corrosion resistance, but rather, it seems to enhance the formation of a compact and thin Mo-rich passive film by selective dissolution of elements. Heat-annealing drastically lowered the corrosion resistance due to Mo-rich precipitate of alloy, which lowered the concentration of Mo in bulk matrix, in particular close to precipitate sections, leading to inhibition of formation of homogenous and compact Mo-rich passive film.

本文言語	English
ページ（範囲）	101-110
ページ数	10
ジャーナル	Corrosion Science
巻	78
DOI	https://doi.org/10.1016/j.corsci.2013.09.004
出版ステータス	Published - 2014 1

ASJC Scopus subject areas

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

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10.1016/j.corsci.2013.09.004

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引用スタイル

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title = "Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid",

abstract = "This study examined the effect of partially substituting cobalt for nickel in Ni-16Cr-15Mo alloy on corrosion resistance to 5.2. M HF acid solution at 100. °C. Microstructural characterisations revealed that cobalt substitution did not have a detrimental effect on corrosion resistance, but rather, it seems to enhance the formation of a compact and thin Mo-rich passive film by selective dissolution of elements. Heat-annealing drastically lowered the corrosion resistance due to Mo-rich precipitate of alloy, which lowered the concentration of Mo in bulk matrix, in particular close to precipitate sections, leading to inhibition of formation of homogenous and compact Mo-rich passive film.",

keywords = "A. Acid solutions, A. Alloy, A. Cobalt, A. Nickel, C. Acid corrosion, C. Interfaces",

author = "Yunping Li and Xiuru Fan and Ning Tang and Huakang Bian and Yuhang Hou 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. The authors would also like to express their appreciation to Mr. Issei Narita for his assistance with EDX observation and Ms. Kazuo Ohmura for her assistance with XPS work. ",

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AU - Li, Yunping

AU - Fan, Xiuru

AU - Tang, Ning

AU - Bian, Huakang

AU - Hou, Yuhang

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. The authors would also like to express their appreciation to Mr. Issei Narita for his assistance with EDX observation and Ms. Kazuo Ohmura for her assistance with XPS work.

PY - 2014/1

Y1 - 2014/1

N2 - This study examined the effect of partially substituting cobalt for nickel in Ni-16Cr-15Mo alloy on corrosion resistance to 5.2. M HF acid solution at 100. °C. Microstructural characterisations revealed that cobalt substitution did not have a detrimental effect on corrosion resistance, but rather, it seems to enhance the formation of a compact and thin Mo-rich passive film by selective dissolution of elements. Heat-annealing drastically lowered the corrosion resistance due to Mo-rich precipitate of alloy, which lowered the concentration of Mo in bulk matrix, in particular close to precipitate sections, leading to inhibition of formation of homogenous and compact Mo-rich passive film.

AB - This study examined the effect of partially substituting cobalt for nickel in Ni-16Cr-15Mo alloy on corrosion resistance to 5.2. M HF acid solution at 100. °C. Microstructural characterisations revealed that cobalt substitution did not have a detrimental effect on corrosion resistance, but rather, it seems to enhance the formation of a compact and thin Mo-rich passive film by selective dissolution of elements. Heat-annealing drastically lowered the corrosion resistance due to Mo-rich precipitate of alloy, which lowered the concentration of Mo in bulk matrix, in particular close to precipitate sections, leading to inhibition of formation of homogenous and compact Mo-rich passive film.

KW - A. Acid solutions

KW - A. Alloy

KW - A. Cobalt

KW - A. Nickel

KW - C. Acid corrosion

KW - C. Interfaces

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