Oxidation resistance and corrosion resistance of molybdenum-chromium nitride layer

Masahiro Nagae; Naoko Ise; Hideyuki Kuwahara; Jun Takada

doi:10.2497/jjspm.56.529

Oxidation resistance and corrosion resistance of molybdenum-chromium nitride layer

Masahiro Nagae, Naoko Ise, Hideyuki Kuwahara, Jun Takada

Faculty of Engineering

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

1 Citation (Scopus)

Abstract

For Mo-Cr nitride layer prepared by NH₃ gas nitriding of pure Mo subjected to Cr-diffusion treatment, the oxidation behavior in air and corrosion behavior in boiling sulfuric acid were investigated. The surface nitride layer consisted of γ-Mo₂N type solid solution of which Mo-Cr ratio was almost 1:1 on the surface. Although γ-Mo₂N layer obtained by nitriding pure Mo was oxidized at temperatures above 773 K, Mo-Cr nitride layer exhibited superior oxidation resistance up to 1073 K. The corrosion resistance of Mo-Cr nitride layer in boiling sulfuric acid was as excellent as that of γ-Mo₂N layer.

Original language	English
Pages (from-to)	529-533
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	56
Issue number	8
DOIs	https://doi.org/10.2497/jjspm.56.529
Publication status	Published - Aug 2009

Keywords

Ammonia gas nitriding
Chromium diffusion
Corrosion resistance
Molybdenum-chromium nitride
Oxidation resistance

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.56.529

Cite this

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title = "Oxidation resistance and corrosion resistance of molybdenum-chromium nitride layer",

abstract = "For Mo-Cr nitride layer prepared by NH3 gas nitriding of pure Mo subjected to Cr-diffusion treatment, the oxidation behavior in air and corrosion behavior in boiling sulfuric acid were investigated. The surface nitride layer consisted of γ-Mo2N type solid solution of which Mo-Cr ratio was almost 1:1 on the surface. Although γ-Mo2N layer obtained by nitriding pure Mo was oxidized at temperatures above 773 K, Mo-Cr nitride layer exhibited superior oxidation resistance up to 1073 K. The corrosion resistance of Mo-Cr nitride layer in boiling sulfuric acid was as excellent as that of γ-Mo2N layer.",

keywords = "Ammonia gas nitriding, Chromium diffusion, Corrosion resistance, Molybdenum-chromium nitride, Oxidation resistance",

author = "Masahiro Nagae and Naoko Ise and Hideyuki Kuwahara and Jun Takada",

year = "2009",

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doi = "10.2497/jjspm.56.529",

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journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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T1 - Oxidation resistance and corrosion resistance of molybdenum-chromium nitride layer

AU - Nagae, Masahiro

AU - Ise, Naoko

AU - Kuwahara, Hideyuki

AU - Takada, Jun

PY - 2009/8

Y1 - 2009/8

N2 - For Mo-Cr nitride layer prepared by NH3 gas nitriding of pure Mo subjected to Cr-diffusion treatment, the oxidation behavior in air and corrosion behavior in boiling sulfuric acid were investigated. The surface nitride layer consisted of γ-Mo2N type solid solution of which Mo-Cr ratio was almost 1:1 on the surface. Although γ-Mo2N layer obtained by nitriding pure Mo was oxidized at temperatures above 773 K, Mo-Cr nitride layer exhibited superior oxidation resistance up to 1073 K. The corrosion resistance of Mo-Cr nitride layer in boiling sulfuric acid was as excellent as that of γ-Mo2N layer.

AB - For Mo-Cr nitride layer prepared by NH3 gas nitriding of pure Mo subjected to Cr-diffusion treatment, the oxidation behavior in air and corrosion behavior in boiling sulfuric acid were investigated. The surface nitride layer consisted of γ-Mo2N type solid solution of which Mo-Cr ratio was almost 1:1 on the surface. Although γ-Mo2N layer obtained by nitriding pure Mo was oxidized at temperatures above 773 K, Mo-Cr nitride layer exhibited superior oxidation resistance up to 1073 K. The corrosion resistance of Mo-Cr nitride layer in boiling sulfuric acid was as excellent as that of γ-Mo2N layer.

KW - Ammonia gas nitriding

KW - Chromium diffusion

KW - Corrosion resistance

KW - Molybdenum-chromium nitride

KW - Oxidation resistance

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Oxidation resistance and corrosion resistance of molybdenum-chromium nitride layer

Abstract

Keywords

ASJC Scopus subject areas

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