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論文情報
タイトル
Electron Excitation Effect of Pure Mg Surface on initial Corrosion Phenomenon
著者
Funatsu, Keisuke
Funatsu, Keisuke
Takei, Rei
Takei, Rei
Umeda, Junko
Umeda, Junko
Kondoh, Katsuyoshi
Kondoh, Katsuyoshi
キーワード等
Magnesium
Surface Potential
SKPFM
Galvanic corrosion
抄録
Magnesium (Mg) has the lowest negative standard electrode potential (-2.363V) among industrial metals. This means that corrosion phenomena easily occur when Mg specimens contact with other metals because a galvanic cell is formed at the interface between two materials due to their large potential difference. The conventional method to improve corrosion resistance of Mg alloys is anodic oxide film formation and/or chemical conversion treatment. However, these methods are expensive and chemically treated Mg products are hard to recycle. In this study, a new corrosion protection method by electron excitation to change the surface potential of pure Mg was investigated. The surface potential variation of pure Mg was measured by using Scanning Kelvin Probe Force Microscopy (SKPFM) to determine the anodic/cathodic area at the interface between different phases in the local galvanic cell. The electronically excited area by electron beam irradiation of a Scanning Electron Microscope (SEM) showed a lower surface potential than that of the as-polished original surface. SEM observation results indicated corrosion resistance at the electronically excited area of a pure Mg specimen was improved. This observation is also supported by salt water immersion tests and Atomic Force Microscope (AFM) analysis results as they indicate fewer corrosion products at the electronically excited area.
公開者
大阪大学接合科学研究所
公開者の別表記
Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
掲載誌名
Transactions of JWRI
巻
40
号
1
開始ページ
9
終了ページ
14
刊行年月
2011-06
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/8437
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.40 No.1 (2011-06)
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著者版フラグ
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.40(1) P.9-P.14
DC.title
Electron Excitation Effect of Pure Mg Surface on initial Corrosion Phenomenon
DC.creator
Funatsu, Keisuke
Takei, Rei
Umeda, Junko
Kondoh, Katsuyoshi
DC.publisher
大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2011-06
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/8437
DC.subject
Magnesium
Surface Potential
SKPFM
Galvanic corrosion
DCTERMS.abstract
Magnesium (Mg) has the lowest negative standard electrode potential (-2.363V) among industrial metals. This means that corrosion phenomena easily occur when Mg specimens contact with other metals because a galvanic cell is formed at the interface between two materials due to their large potential difference. The conventional method to improve corrosion resistance of Mg alloys is anodic oxide film formation and/or chemical conversion treatment. However, these methods are expensive and chemically treated Mg products are hard to recycle. In this study, a new corrosion protection method by electron excitation to change the surface potential of pure Mg was investigated. The surface potential variation of pure Mg was measured by using Scanning Kelvin Probe Force Microscopy (SKPFM) to determine the anodic/cathodic area at the interface between different phases in the local galvanic cell. The electronically excited area by electron beam irradiation of a Scanning Electron Microscope (SEM) showed a lower surface potential than that of the as-polished original surface. SEM observation results indicated corrosion resistance at the electronically excited area of a pure Mg specimen was improved. This observation is also supported by salt water immersion tests and Atomic Force Microscope (AFM) analysis results as they indicate fewer corrosion products at the electronically excited area.
citation_title
Electron Excitation Effect of Pure Mg Surface on initial Corrosion Phenomenon
citation_author
Funatsu, Keisuke
Takei, Rei
Umeda, Junko
Kondoh, Katsuyoshi
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2011-06
citation_journal_title
Transactions of JWRI
citation_volume
40
citation_issue
1
citation_firstpage
9
citation_lastpage
14
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/8437
citation_keywords
Magnesium
Surface Potential
SKPFM
Galvanic corrosion