Comparative XPS Study of Silver and Copper Surfaces Exposed to Flowing Air Containing Low Concentration of Sulfur Dioxide

• Watanabe Masamitsu

  Technical Assistance and Support Center, Nippon Telegraph and Telephone East Corporation

• Ando Hiroshi

  Materials Analysis Center, NTT Advanced Technology Corporation

• Handa Takao

  Technical Assistance and Support Center, Nippon Telegraph and Telephone East Corporation

• Ichino Toshihiro

  NTT Energy and Environment Systems Laboratories, Nippon Telegraph and Telephone Corporation

• Kuwaki Nobuo

  Technical Assistance and Support Center, Nippon Telegraph and Telephone East Corporation

抄録

Sulfur dioxide (SO₂) is a typical gas affecting the atmospheric corrosion of metals, particularly outdoors. Although many studies have investigated the effect of SO₂ on the atmospheric corrosion of silver and copper, little is known about the early stage of their corrosion behavior. In this study we analyzed the chemical state of sulfur on silver and copper plates exposed to flowing air containing low concentrations (18 and 148 ppb) of SO₂ using X-ray photoelectron spectroscopy (XPS). The shapes of the spectra were the same for both concentrations, indicating that the chemical state of the analyzed elements did not depend on the SO₂ concentration. There was a difference in the chemical state of the sulfur between the silver and copper. Three peaks were observed in the S 2p XPS spectra for the silver originating from bisulfite, S₂O₅^2-, S₂O₃^2-, and S^2-. The bisulfite resulted from SO₂ dissolution into the surface electrolyte, and the others resulted from the reduction of sulfurous acid. In contrast, only bisulfite was observed in the S 2p XPS spectra for the copper. It also originated from the dissolution of SO₂ into the surface electrolyte. The difference in the chemical state of the sulfur between the silver and copper is attributed to the presence of native oxides on the surface, which may have impeded the reduction of bisulfite.

収録刊行物

• Ｚａｉｒｙｏ‐ｔｏ‐Ｋａｎｋｙｏ

  Ｚａｉｒｙｏ‐ｔｏ‐Ｋａｎｋｙｏ 56 (1), 10-15, 2007

  公益社団法人 腐食防食学会

キーワード

• 銀
• 銅
• 大気腐食
• 二酸化硫黄
• X線光電子分光（XPS）
• 化学状態分析

詳細情報

• CRID: 1390282681236061568
• NII論文ID: 130004502920
• NII論文ID: 10018705853
• NII書誌ID: AN10235427
• DOI: 10.3323/jcorr.56.10
• ISSN: 18819664
• ISSN: 09170480
• NDL書誌ID: 8650038
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8650038
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可