Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Galvanic Sensor System for Detecting the Corrosion Damage of the Steel in Concrete

  • Kim, Jung-Gu (Department of Advanced Materials Enginieering, Sungkyunkwan University) ;
  • Park, Zin-Taek (Department of Advanced Materials Enginieering, Sungkyunkwan University) ;
  • Yoo, Ji-Hong (Department of Advanced Materials Enginieering, Sungkyunkwan University) ;
  • Hwang, Woon-Suk (School of Materials Science and Engineering, Inha University)
  • Published : 2004.06.01
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Abstract

The correlation between sensor output and corrosion rate of reinforcing steel was evaluated by laboratory electrochemical tests in saturated $Ca(OH)_2$ with 3.5 wt.% NaCl and confirmed in concrete environment. In this paper, two types of electrochemical probes were developed: galvanic cells containing of steel/copper and steel/stainless steel couples. Potentiodynamic test, weight loss measurement, monitoring of open-circuit potential, linear polarization resistance (LPR) measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar embedded in concrete. Also, galvanic current measurements were conducted to obtain the charge of sensor embedded in concrete. In this study, steel/copper and steel/stainless steel sensors showed a good correlation in simulated concrete solution between sensor output and corrosion rate of steel bar. However, there was no linear relationship between steel/stainless steel sensor output and corrosion rate of steel bar in concrete environment due to the low galvanic current output. Thus, steel/copper sensor is a reliable corrosion monitoring sensor system which can detect corrosion rate of reinforcing steel in concrete structures.

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References

  1. J. P. Broomfield, Corrosion of Steel in Concrete, p.22, E & FN SPON, London, 1997
  2. T. Yonezawa, V. Ashworth, and R. P. M. Procter, Corrosion 44, 489 (1988)
  3. M. F. Montemor, A. M. P. Simoes, and M. M. Salta, Cement and Concrete Composites 22, 175 (2000)
  4. B. Borgard, C. Warren, S. Somayaji, and R. Heidersbach, Mechanisms of Corrosion of Steel in Concrete, ASTM STP 1065, p.174, Philadelphia, 1990
  5. B. Elsener, Cement and Concrete Composites 24, 65 (2002)
  6. C. Arya and P. R. W. Vassie, Cement and Concrete Research 25, 989 (1995)
  7. J. Gulikers, Construction and Building Materials 11, 143 (1997)
  8. M. Raupach and P. P. Schiessl, Construction and Building Materials 11, 207 (1997)
  9. S. W. Dean, Handbook on Corrosion Testing and Evaluation, p.171, John Wiley and Sons, New York,1971
  10. H. P. Lee and K. Nobe, Journal of Electrochemical Society 133, 2035 (1986)
  11. A. V. Benedetti, P. T. A. Sumodjo, K. Nobe, P. L. Cabot and W. G. Proud, Electrochimica Acta 40, 2657 (1995)
  12. ASTM Standard G31, 'Standard Practice for Laboratory Immersion Corrosion Testing of Metals,' in 1994 Book ofASTMStandards, vol. 03.02,p.102, West Conshohocken, ASTM, 1994
  13. R. A. Buchanan, Fundamentals of Electrochemical Corrosion, p.164, ASM International, Ohio, 2000
  14. D. A. Jones, Principles and Prevention of Corrosion, p.75, Prentice-Hall, London, 1996
  15. M. Pourbaix, Atlas of Electrochemical Equilibria, NACE, Houston, Texas, 1974
  16. ASTM C 876-91, Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete, ASTM, Philadelphia, PA, 1994
  17. C. Andrade and J.A. Gonzalez, Mater. Corr. 29, 515 (1978)
  18. N.S. Berke, M.P. Dallaire, M.C. Hicks, and R.J. Hoopes, Corrosion 49, 934 (1993)
  19. B.C. Syrett, Electrochemical Impedance and Noise, NACE, Houston, Texas, 1999