Corrosion Monitoring of Weathering Steel Bridges by Electrochemical Impedance Method

• Project/Area Number: 20246108
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: NISHIKATA Atsushi 東京工業大学, 大学院・理工学研究科, 教授 (90180588)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥22,360,000 (Direct Cost: ¥17,200,000、Indirect Cost: ¥5,160,000); Fiscal Year 2010: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2009: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2008: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
• Keywords: 大気腐食 / 腐食モニタリング / 耐候性鋼 / 電気化学インピーダンス / 海塩粒子 / 相対湿度 / 橋梁 / 電化化学インピーダンス

Research Abstract

Corrosion monitoring of weathering steel has been carried out for two years at two different weathering bridges, Naebiki bridge(Niigata) and Ryogoku bridge(Fukuyama) by electrochemical impedance method. Average values of reciprocal of low frequency impedance at 10mHz(1/Z10mHz) well correlate with average corrosion rate obtained by corrosion weight loss measurements. The correlation equation was obtained as follows :(Icorr/μAcm^<-2>)=17. 7×(Z10mHz/Ωcm^2)^<-0. 16>.

Research Products

• [Journal Article] Corrosion Monitoring of Weathering Steel Bridges Using Electrochemical Impedance Method (2009)
  • Author(s): Atsushi Nishikata, Tooru Tsuru
  • Journal Title: Proc.The 15^<th> APCCC (CD-ROM)
• [Journal Article] Monitoring of Pitting Corrosion Initiation of Stainless Steel in Chloride Containing Environment (2009)
  • Author(s): Sri Hastuty, Atsushi Nishikata, Tooru Tsuru
  • Journal Title: Proc.The 15^<th> APCCC (CD-ROM)
• [Presentation] Atmospheric Corrosion Monitoring of Weathering Steels by Electrochemical Impedance Technique (2011)
  • Author(s): Atsushi Nishikata
  • Organizer: Extended Abstracts 62th ISE Meeting
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2011-11-16
• [Presentation] 電気化学インピーダンス法による実耐候性橋梁の腐食モニタリング (2010)
  • Author(s): 西方篤、水流徹
  • Organizer: 材料と環境'2010講演集
  • Place of Presentation: 早稲田大学
  • Year and Date: 2010-05-14
• [Presentation] 電気化学インピーダンス法による実耐候性橋梁の腐食モニタリング (2010)
  • Author(s): 西方篤、水流徹
  • Organizer: 材料と環境' 2010講演集
  • Place of Presentation: 東京
• [Presentation] Tooru Tsuru, Corrosion Monitoring of Weathering Steel Bridges Using Electrochemical Impedance Method (2009)
  • Author(s): Atsushi Nishikata
  • Organizer: The 15th APCCC
  • Place of Presentation: Philippines
• [Presentation] Pitting Corrosion of 430 Stainless Steel under Droplet of Chloride Solutions (2008)
  • Author(s): Sri Hastuty, Atsushi Nishikata, Tooru Tsuru
  • Organizer: Electrochemical Society
  • Place of Presentation: 米国ハワイ
  • Year and Date: 2008-10-14