Inhibition of Anodic Dissolution of Zinc-plated Steel by Electro-deposition of Magnesium from a Molten Salt.

• Morishita Masao

  Department of Materials Science and Engineering, Faculty of Engineering, Himeji Institute of Technology

• Koyama Koichiro

  Department of Materials Science and Engineering, Faculty of Engineering, Himeji Institute of Technology

• Mori Yoshitaka

  Graduate Student, Himeji Institute of Technology

抄録

Inhibition of anodic dissolution of zinc-plated steel by electro-deposition of magnesium from the 55 mol%LiCl-34 mol%KCl-5 mol%MgCl₂-1 mol%CsCl-5 mol%KI molten salt was investigated. On a heat treatment, the zinc layer changed to 3 layers: the outer layer; the inner layer; interface layer just on the substrate steel. Four steps of anodic dissolution were obsereved in the anodic polarization curves in 5 mass% NaCl aqueus solution. The first step was the anodic dissolution of the MgZn₂ and Mg₂Zn₁₁ in the outer layer and the inner layer. The second one was the active dissolution of the remaining zinc in the inner layer. The third one was the active dissolution of the Γ₁ phase in the interface layer. The fourth step was the active dissolution of the matrix steel. It should be noted that the anodic current density of the first step was very small in comparison with the others. The present results suggested that the intermetallic compounds, MgZn₂ and Mg₂Zn₁₁, make a protective films on the surface, inhibit the anodic dissolution and give the high corrosion resistance to the magnesium-deposited zinc-plated steel.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 37 (1), 55-58, 1997

  一般社団法人 日本鉄鋼協会

キーワード

• corrosion resistance
• magnesium-electrodeposited zinc-plated steel
• anodic polarization

詳細情報

• CRID: 1390282681427812736
• NII論文ID: 10002454723
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.37.55
• COI: 1:CAS:528:DyaK2sXnsFOgsg%3D%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/37/1/37_1_55/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可