Electrochemical Characteristics of <I>Niiro</I>-colored Cupper Colored by Japanese Traditional Craft-technique

• Kitada Masahiro

  Tokyo National University of Fine Arts and Music

• Kirino Fumiyoshi

  Tokyo National University of Fine Arts and Music

• Tsuru Tooru

  Tokyo Institute of Technology

• Sugimoto Katsuhisa

  Tohoku University

• Matsushima Tomohide

  Tokyo National University of Fine Arts and Music

Bibliographic Information

Other Title

• 伝統技法で煮色着色した銅の電気化学特性
• デントウ ギホウ デ ニショク チャクショク シタ ドウ ノ デンキ カガク トクセイ

Abstract

The electrochemical characteristics and corrosion behavior of Niiro-colored Cu, colored by a traditional Japanese craft technique, have been investigated. The specimens are colored in a solution containing CuSO₄, artificial malachite powder and alum. The oxidation potential of Niiro-colored Cu is higher than that of untreated Cu, indicating that the corrosion resistance of Niiro-colored Cu is higher than that of untreated Cu. Although the reaction electron number of untreated Cu is approximately two, the number of Niiro-colored Cu is unity in 2-8 pH solutions. The Niiro-colored Cu surface consists of double layers chemically. The thin upper layer is a copper(II) oxide such as CuO and the underlayer is a copper(I) oxide such as Cu₂O. Niiro-colored Cu shows good corrosion resistance when the specimens are exposed at 353 K in 90%RH atmosphere. The oxidation potential of Niiro-colored Cu in a solution containing Cl⁻ of 8.3 pH is higher than that of untreated Cu.

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 66 (12), 1356-1361, 2002

  The Japan Institute of Metals and Materials

Keywords

• electrochemical characteristic
• <I>Niiro</I>-colored copper
• corrosion behavior
• craft technique

Details

• CRID: 1390282681467893120
• NII Article ID: 130007341779
• NII Article ID: 10010601166
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet1952.66.12_1356
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• ISSN: http://id.crossref.org/issn/00214876
• ISSN: http://id.crossref.org/issn/00214426
• NDL BIB ID: 6409290
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6409290
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/66/12/66_12_1356/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed