Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu

Yunping Li; Xiandong Xu; Yuhang Hou; Chen Zhang; Fenglin Wang; Kazuyo Omura; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2015.05.024

Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu

Yunping Li, Xiandong Xu, Yuhang Hou, Chen Zhang, Fenglin Wang, Kazuyo Omura, Yuichiro Koizumi, Akihiko Chiba

New Industry Creation Hatchery Center (NICHe)

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

25 Citations (Scopus)

Abstract

The effect of 2. wt.% Cu addition on the corrosion resistance of Ni-30Co-16Cr-15Mo-6Fe alloy in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observations of the passive film of samples after immersion testing via various methods revealed that the small addition of Cu yielded a tremendous improvement in corrosion resistance, even after cold forging. In addition, the passivation of Ni-30Co-16Cr-15Mo-6Fe alloy by a Mo-oxide-dominated passive film was completely changed to passivation by a Cu-dominated one in Ni-30Co-16Cr-15Mo-6Fe-2Cu alloy during immersion in hydrofluoric acid solution because the segregation behaviour of Cu was much stronger compared to that of Mo.

Original language	English
Pages (from-to)	119-127
Number of pages	9
Journal	Corrosion Science
Volume	98
DOIs	https://doi.org/10.1016/j.corsci.2015.05.024
Publication status	Published - 2015 Sept 1

Keywords

Acid corrosion
Acid solutions
Alloys
Cobalt
Interfaces
Nickel

Access to Document

10.1016/j.corsci.2015.05.024

Cite this

@article{ecb04e71a0964445983ad335b6fc213c,

title = "Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu",

abstract = "The effect of 2. wt.% Cu addition on the corrosion resistance of Ni-30Co-16Cr-15Mo-6Fe alloy in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observations of the passive film of samples after immersion testing via various methods revealed that the small addition of Cu yielded a tremendous improvement in corrosion resistance, even after cold forging. In addition, the passivation of Ni-30Co-16Cr-15Mo-6Fe alloy by a Mo-oxide-dominated passive film was completely changed to passivation by a Cu-dominated one in Ni-30Co-16Cr-15Mo-6Fe-2Cu alloy during immersion in hydrofluoric acid solution because the segregation behaviour of Cu was much stronger compared to that of Mo.",

keywords = "Acid corrosion, Acid solutions, Alloys, Cobalt, Interfaces, Nickel",

author = "Yunping Li and Xiandong Xu and Yuhang Hou and Chen Zhang and Fenglin Wang and Kazuyo Omura and Yuichiro Koizumi and Akihiko Chiba",

note = "Publisher Copyright: {\textcopyright} 2015.",

year = "2015",

month = sep,

day = "1",

doi = "10.1016/j.corsci.2015.05.024",

language = "English",

volume = "98",

pages = "119--127",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu

AU - Li, Yunping

AU - Xu, Xiandong

AU - Hou, Yuhang

AU - Zhang, Chen

AU - Wang, Fenglin

AU - Omura, Kazuyo

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

PY - 2015/9/1

Y1 - 2015/9/1

N2 - The effect of 2. wt.% Cu addition on the corrosion resistance of Ni-30Co-16Cr-15Mo-6Fe alloy in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observations of the passive film of samples after immersion testing via various methods revealed that the small addition of Cu yielded a tremendous improvement in corrosion resistance, even after cold forging. In addition, the passivation of Ni-30Co-16Cr-15Mo-6Fe alloy by a Mo-oxide-dominated passive film was completely changed to passivation by a Cu-dominated one in Ni-30Co-16Cr-15Mo-6Fe-2Cu alloy during immersion in hydrofluoric acid solution because the segregation behaviour of Cu was much stronger compared to that of Mo.

AB - The effect of 2. wt.% Cu addition on the corrosion resistance of Ni-30Co-16Cr-15Mo-6Fe alloy in hydrofluoric acid was investigated by immersion testing at 100. °C. Microstructural observations of the passive film of samples after immersion testing via various methods revealed that the small addition of Cu yielded a tremendous improvement in corrosion resistance, even after cold forging. In addition, the passivation of Ni-30Co-16Cr-15Mo-6Fe alloy by a Mo-oxide-dominated passive film was completely changed to passivation by a Cu-dominated one in Ni-30Co-16Cr-15Mo-6Fe-2Cu alloy during immersion in hydrofluoric acid solution because the segregation behaviour of Cu was much stronger compared to that of Mo.

KW - Acid corrosion

KW - Acid solutions

KW - Alloys

KW - Cobalt

KW - Interfaces

KW - Nickel

UR - http://www.scopus.com/inward/record.url?scp=84937971330&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84937971330&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2015.05.024

DO - 10.1016/j.corsci.2015.05.024

M3 - Article

AN - SCOPUS:84937971330

SN - 0010-938X

VL - 98

SP - 119

EP - 127

JO - Corrosion Science

JF - Corrosion Science

ER -

Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this