Hydrogen Permeation Behavior of Scratch Formed on Zn Coated Steels in Simulated Atmospheric Corrosion Environment

• Sakata Kei

  Graduate School of Engineering, Hokkaido University

• Sakairi Masatoshi

  Faculty of Engineering, Hokkaido University

• Kinugasa Junichiro

  Materials Research Laboratory, Kobe Steel Ltd.

抄録

In this study, the electrochemical hydrogen permeation technique was introduced to investigate the relationship between scratch shape and hydrogen permeation on of Zn coated steel with wet and dry cyclic corrosion. Six kinds of scratches with different aspect ratio (width/length) and area were fabricated by focused pulsed Nd: YAG laser irradiation. Hydrogen permeation currents with each scratches formed on Zn coated steels were investigated. Regardless of scratch shapes, the peaks were recorded in hydrogen permeation currents during wetting and Zn corrosion products were observed around and on the formed scratches. The total hydrogen permeation charges calculated from hydrogen permeation currents depended on aspect ratio and area of scratch. It is suggested that Zn corrosion products easily covered high aspect ratio scratch and prevented hydrogen entry. In detail change of hydrogen permeation currents during wet and dry corrosion tests was also explained based on coverage and composition of Zn corrosion products.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 61 (4), 1120-1126, 2021-04-15

  一般社団法人 日本鉄鋼協会

キーワード

• electrochemical permeated hydrogen detection
• Zn coated steel
• scratch
• laser fabrication
• simulated atmospheric corrosion environment

詳細情報

• CRID: 1390287696160537344
• NII論文ID: 130008024830
• DOI: 10.2355/isijinternational.isijint-2020-302
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/61/4/61_ISIJINT-2020-302/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可