Development of corrosion monitoring method applicable to high subcritical and supercritical aqueous oxidation environment

• Project/Area Number: 19560822
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Recycling engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: INOUE Hiroyuki Osaka Prefecture University, 大学院・工学研究科, 講師 (40203252)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 高温亜臨界水酸化 / SCWO / 電気化学ノイズ / 腐食モニタリング / 電位ノイズ / 超臨界水酸化

Research Abstract

これまで適当な手法が無かった、高温亜臨界ならびに超臨界水酸化環境での腐食モニタリングを、電位ノイズ法の適用によって実現することを試みた。380℃よりも低い高温亜臨界温度域では、汎用ステンレス鋼であるSUS304鋼、高耐食性のNi 基材料であるC-276のいずれの試験片でも、全面腐食ならびに局部腐食の発生を、測定された電位ノイズ信号の波形から検出できることを確認した。超臨界水酸化環境では、臨界点に近い400℃を除き、低pHかつ高酸化性の溶液中でも、SUS304鋼試験片に腐食の痕跡は認められず、また電位ノイズの信号の発生もなかった。

Research Products

• [Presentation] Electrochemical noise analy sis for monitoring the initiation of locali zed corrosion (2009)
  • Author(s): H.Inoue
  • Organizer: 4th International worksh op on risk-based engineering
  • Place of Presentation: Tokyo
  • Year and Date: 2009-11-20
• [Presentation] Corrosion behavior of type-304 stainless steel in supercritical aqueous hydrochloric acid solution (2009)
  • Author(s): H. Inoue, K. Kawada,R. Nishimura
  • Organizer: The 4th International Symposium on Material Cycling Engineering
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2009-05-10
• [Presentation] Corrosion behavior of type-304 stainless steel in supercritical aqueous hydrochloric acid solution. (2009)
  • Author(s): H. Inoue, K. Kawada, R. Nishimura
  • Organizer: The 4th International Symposium on Material Cycling Engineering
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2009-03-10
• [Presentation] Study on corrosion behavior of metallic materials in supercritical water oxidation envir onment by electrochemical methods (2008)
  • Author(s): K. Kawada, H. Inoue, R. Nishimura
  • Organizer: The 3rd International Symposium on Material Cycling Engineering
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2008-05-13
• [Presentation] Study on corrosion behavior of metallic materials in supercritical water oxidation environment by electrochemical methods (2008)
  • Author(s): K.Kawada, H. Inoue, R. Nishimura
  • Organizer: The 3rd International Symposium on Material Cycling Engineering
  • Place of Presentation: Osaka,Japan
  • Year and Date: 2008-05-13