Corrosion Resistance of Alumina-Chromia Ceramic Materials Against Molten Slag

• Hirata Takehiko

  Advanced Technology Research Center, Mitsubishi Heavy Industries, Ltd.

• Morimoto Tatsuo

  Advanced Technology Research Center, Mitsubishi Heavy Industries, Ltd.

• Deguchi Akio

  Yokohama Research and Development Center, Mitsubishi Heavy Industries, Ltd.

• Uchida Nozomu

  Nagaoka University of Technology

抄録

Improvement of the corrosion resistance of refractories is required critically, since Al₂O₃ based conventional refractories used for incineration at the power generation plants are seriously corroded by the molten oxide mixture. In this study, the effect of the addition of Cr₂O₃ to Al₂O₃ on the corrosion resistance, and the corrosion behavior of Cr₂O₃–Al₂O₃ system are investigated in the molten oxide. Cr₂O₃–Al₂O₃ ceramic materials with TiO₂ as a sintering additive were used for the corrosion tests. Specimens were soaked into the SiO₂–CaO–Al₂O₃ based molten oxide and rotated. The corrosion rate of the material is controlled by the diffusion of components of Cr₂O₃–Al₂O₃ through the boundary layer. The corrosion resistance was improved by addition of Cr₂O₃. The largest improvement was achieved when the addition of Cr₂O₃ was 81.6 mol%. It can be explained by the difference of diffusion rate of Cr³⁺ and Al³⁺.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (10), 2561-2567, 2002

  公益社団法人 日本金属学会

キーワード

• corrosion
• aluminum oxide
• chromium oxide
• molten slag
• boundary layer
• diffusion

詳細情報

• CRID: 1390001204248477568
• NII論文ID: 130004451686
• NII論文ID: 10012327326
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.43.2561
• COI: 1:CAS:528:DC%2BD38XptVyks7s%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 6341437
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6341437
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/10/43_10_2561/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可