Nondestructive Corrosion Detection in RC Through Integrated Heat Induction and IR Thermography

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• 作者：Seunghoon Baek (1) seunghob@uci.edu
  William Xue (2)
  Maria Q. Feng (3) mfeng@columbia.edu
  Seungjun Kwon (4)
• 关键词：IR thrermography – ; Inductive heating – ; Impressed current – ; Concrete – ; Corrosion – ; NDE
• 刊名：Journal of Nondestructive Evaluation
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：31
• 期：2
• 页码：181-190
• 全文大小：2.5 MB
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  16. Yun, J.Y., Paik, I.K., Cho, S.H., Chung, L.: Non-destructive corrosion measurement technique of reinforcing bars using infrared thermography according to atmosphere temperature. Proc. KCI 18, 2 (2006)
• 作者单位：1. Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697, USA2. University High School, Irvine, CA, USA3. Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA4. Civil Engineering, Hannam University, 133 Ojeong-dong, Daedeok-Gu, Daejeon, 306-791 Korea
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Characterization and Evaluation Materials
  Vibration, Dynamical Systems and Control
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4862

文摘

A novel integrated system of electromagnetic heat induction and infrared (IR) thermography is proposed for nondestructive detection of steel corrosion in reinforced concrete (RC) structures, by taking advantage of the difference in thermal characteristics of corroded and non-corroded steel. This paper presents a proof-of-concept experimental study. An inductive heater was employed to remotely heat the steel rebar from concrete surface, and an IR camera was applied to measure IR intensity at the concrete surface. Bare rebar and concrete specimens with different cover depths were fabricated, and induced with different levels of corrosion through an accelerated corrosion process. IR thermography was recorded during the specimen heating and cooling periods. The test results reveal a clear correlation between the extent of corrosion and the IR thermal characteristics. More corroded specimens exhibit higher peak IR intensities and faster rates of heating than those of less corroded specimens. As the concrete cover depth increases, however, it becomes less efficient to heat the rebar and more difficult to identify the difference between corroded and non-corroded specimens using the IR camera. This study demonstrates a potential application of the integration of heat induction and IR thermography for nondestructive detection of rebar corrosion in concrete structure.