Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid

Yuhang Hou; Yunping Li; Emi Onodera; Chen Zhang; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2014.10.003

Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid

Yuhang Hou, Yunping Li, Emi Onodera, Chen Zhang, Yuichiro Koizumi, Akihiko Chiba

New Industry Creation Hatchery Center (NICHe)

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

19 Citations (Scopus)

Abstract

Ex-situ observation by laser microscopy was used to investigate the effect of plastic deformation induced by a micro-hardness tester on the corrosion resistance of both Ni-16Cr-15Mo-6Fe-0.5Si (NiCrMo) and Ni-30Co-16Cr-15Mo-6Fe-0.5Si (NiCoCrMo) alloys during immersion in hydrofluoric acid. This found that although the indentation in NiCrMo became slightly deeper and broader following immersion, this effect was far more pronounced with NiCoCrMo. Growth observed in the size of voids is attributed to preferential dissolution of SiO₂ particles, as well as an accumulation of dislocations and other defects around them, with these defects also playing a key role in the subsequent coalescence of voids on the sample surface.

Original language	English
Pages (from-to)	133-139
Number of pages	7
Journal	Corrosion Science
Volume	90
DOIs	https://doi.org/10.1016/j.corsci.2014.10.003
Publication status	Published - 2015 Jan 1

Keywords

A. Acid solutions
A. Alloy
A. Cobalt
A. Nickel
C. Acid corrosion
C. Interfaces

Access to Document

10.1016/j.corsci.2014.10.003

Cite this

@article{fb64a3bbd57e4292897bb56683ec5b25,

title = "Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid",

abstract = "Ex-situ observation by laser microscopy was used to investigate the effect of plastic deformation induced by a micro-hardness tester on the corrosion resistance of both Ni-16Cr-15Mo-6Fe-0.5Si (NiCrMo) and Ni-30Co-16Cr-15Mo-6Fe-0.5Si (NiCoCrMo) alloys during immersion in hydrofluoric acid. This found that although the indentation in NiCrMo became slightly deeper and broader following immersion, this effect was far more pronounced with NiCoCrMo. Growth observed in the size of voids is attributed to preferential dissolution of SiO2 particles, as well as an accumulation of dislocations and other defects around them, with these defects also playing a key role in the subsequent coalescence of voids on the sample surface.",

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

author = "Yuhang Hou and Yunping Li and Emi Onodera and Chen Zhang and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: This research was mainly supported by a Program of Industry Innovation Centre of Iwate Prefecture, Japan . Publisher Copyright: {\textcopyright} 2014.",

year = "2015",

month = jan,

day = "1",

doi = "10.1016/j.corsci.2014.10.003",

language = "English",

volume = "90",

pages = "133--139",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid

AU - Hou, Yuhang

AU - Li, Yunping

AU - Onodera, Emi

AU - Zhang, Chen

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Ex-situ observation by laser microscopy was used to investigate the effect of plastic deformation induced by a micro-hardness tester on the corrosion resistance of both Ni-16Cr-15Mo-6Fe-0.5Si (NiCrMo) and Ni-30Co-16Cr-15Mo-6Fe-0.5Si (NiCoCrMo) alloys during immersion in hydrofluoric acid. This found that although the indentation in NiCrMo became slightly deeper and broader following immersion, this effect was far more pronounced with NiCoCrMo. Growth observed in the size of voids is attributed to preferential dissolution of SiO2 particles, as well as an accumulation of dislocations and other defects around them, with these defects also playing a key role in the subsequent coalescence of voids on the sample surface.

AB - Ex-situ observation by laser microscopy was used to investigate the effect of plastic deformation induced by a micro-hardness tester on the corrosion resistance of both Ni-16Cr-15Mo-6Fe-0.5Si (NiCrMo) and Ni-30Co-16Cr-15Mo-6Fe-0.5Si (NiCoCrMo) alloys during immersion in hydrofluoric acid. This found that although the indentation in NiCrMo became slightly deeper and broader following immersion, this effect was far more pronounced with NiCoCrMo. Growth observed in the size of voids is attributed to preferential dissolution of SiO2 particles, as well as an accumulation of dislocations and other defects around them, with these defects also playing a key role in the subsequent coalescence of voids on the sample surface.

KW - A. Acid solutions

KW - A. Alloy

KW - A. Cobalt

KW - A. Nickel

KW - C. Acid corrosion

KW - C. Interfaces

UR - http://www.scopus.com/inward/record.url?scp=84913538421&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84913538421&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2014.10.003

DO - 10.1016/j.corsci.2014.10.003

M3 - Article

AN - SCOPUS:84913538421

SN - 0010-938X

VL - 90

SP - 133

EP - 139

JO - Corrosion Science

JF - Corrosion Science

ER -

Ex-situ observation on the dissolution behaviour of Ni-16Cr-15Mo and Ni-30Co-16Cr-15Mo alloys in hydrofluoric acid

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this