Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium

Yunping Li; Ning Tang; Phacharaphon Tunthawiroon; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2013.03.026

Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium

Yunping Li, Ning Tang, Phacharaphon Tunthawiroon, Yuichiro Koizumi, Akihiko Chiba

New Industry Creation Hatchery Center (NICHe)

Tohoku University

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

27 Citations (Scopus)

Abstract

Oxide films formed at 700°C on Co-29Cr-6Mo alloy were characterised extensively to improve the corrosion resistance of the alloy to liquid Al, enabling its use in Al die-casting moulds. Film of duplex layer consisting of an outer CoO-rich layer and an inner Cr₂O₃-rich layer was observed in samples subjected to oxidation for 4h. With an increase in duration of oxidation, CoO was gradually replaced by Cr₂O₃, resulting in a single-layered oxide film dominantly composed of Cr₂O₃. The oxide film evolved with duration of oxidation treatment indicating the possibility of optimising films for Al die-casting moulds.

Original language	English
Pages (from-to)	72-79
Number of pages	8
Journal	Corrosion Science
Volume	73
DOIs	https://doi.org/10.1016/j.corsci.2013.03.026
Publication status	Published - 2013 Aug

Keywords

A. Cobalt
B. SEM
B. XPS
C. Interfaces
C. Oxide coatings

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10.1016/j.corsci.2013.03.026

Cite this

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title = "Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium",

abstract = "Oxide films formed at 700°C on Co-29Cr-6Mo alloy were characterised extensively to improve the corrosion resistance of the alloy to liquid Al, enabling its use in Al die-casting moulds. Film of duplex layer consisting of an outer CoO-rich layer and an inner Cr2O3-rich layer was observed in samples subjected to oxidation for 4h. With an increase in duration of oxidation, CoO was gradually replaced by Cr2O3, resulting in a single-layered oxide film dominantly composed of Cr2O3. The oxide film evolved with duration of oxidation treatment indicating the possibility of optimising films for Al die-casting moulds.",

keywords = "A. Cobalt, B. SEM, B. XPS, C. Interfaces, C. Oxide coatings",

author = "Yunping Li and Ning Tang and Phacharaphon Tunthawiroon and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: This research was supported by the Regional Innovation Cluster Program 2010 from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.",

year = "2013",

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doi = "10.1016/j.corsci.2013.03.026",

language = "English",

volume = "73",

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journal = "Corrosion Science",

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T1 - Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium

AU - Li, Yunping

AU - Tang, Ning

AU - Tunthawiroon, Phacharaphon

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

N1 - Funding Information: This research was supported by the Regional Innovation Cluster Program 2010 from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.

PY - 2013/8

Y1 - 2013/8

N2 - Oxide films formed at 700°C on Co-29Cr-6Mo alloy were characterised extensively to improve the corrosion resistance of the alloy to liquid Al, enabling its use in Al die-casting moulds. Film of duplex layer consisting of an outer CoO-rich layer and an inner Cr2O3-rich layer was observed in samples subjected to oxidation for 4h. With an increase in duration of oxidation, CoO was gradually replaced by Cr2O3, resulting in a single-layered oxide film dominantly composed of Cr2O3. The oxide film evolved with duration of oxidation treatment indicating the possibility of optimising films for Al die-casting moulds.

AB - Oxide films formed at 700°C on Co-29Cr-6Mo alloy were characterised extensively to improve the corrosion resistance of the alloy to liquid Al, enabling its use in Al die-casting moulds. Film of duplex layer consisting of an outer CoO-rich layer and an inner Cr2O3-rich layer was observed in samples subjected to oxidation for 4h. With an increase in duration of oxidation, CoO was gradually replaced by Cr2O3, resulting in a single-layered oxide film dominantly composed of Cr2O3. The oxide film evolved with duration of oxidation treatment indicating the possibility of optimising films for Al die-casting moulds.

KW - A. Cobalt

KW - B. SEM

KW - B. XPS

KW - C. Interfaces

KW - C. Oxide coatings

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DO - 10.1016/j.corsci.2013.03.026

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VL - 73

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EP - 79

JO - Corrosion Science

JF - Corrosion Science

ER -

Characterisation of oxide films formed on Co-29Cr-6Mo alloy used in die-casting moulds for aluminium

Abstract

Keywords

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