[KSCI] Korea Science Citation Index Service

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)

Publication Information

Corrosion Science and Technology / v.3, no.3, 2004 , pp. 118-126 More about this Journal

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.

Keywords

galvanic sensor system; concrete; corrosion; pore solution; chloride;

Citations & Related Records

Reference

1	J. P. Broomfield, Corrosion of Steel in Concrete, p.22, E & FN SPON, London, 1997
2	M. F. Montemor, A. M. P. Simoes, and M. M. Salta, Cement and Concrete Composites 22, 175 (2000)
3	M. Pourbaix, Atlas of Electrochemical Equilibria, NACE, Houston, Texas, 1974
4	A. V. Benedetti, P. T. A. Sumodjo, K. Nobe, P. L. Cabot and W. G. Proud, Electrochimica Acta 40, 2657 (1995)
5	B.C. Syrett, Electrochemical Impedance and Noise, NACE, Houston, Texas, 1999
6	D. A. Jones, Principles and Prevention of Corrosion, p.75, Prentice-Hall, London, 1996
7	T. Yonezawa, V. Ashworth, and R. P. M. Procter, Corrosion 44, 489 (1988)
8	R. A. Buchanan, Fundamentals of Electrochemical Corrosion, p.164, ASM International, Ohio, 2000
9	J. Gulikers, Construction and Building Materials 11, 143 (1997)
10	S. W. Dean, Handbook on Corrosion Testing and Evaluation, p.171, John Wiley and Sons, New York,1971
11	N.S. Berke, M.P. Dallaire, M.C. Hicks, and R.J. Hoopes, Corrosion 49, 934 (1993)
12	C. Andrade and J.A. Gonzalez, Mater. Corr. 29, 515 (1978)
13	B. Borgard, C. Warren, S. Somayaji, and R. Heidersbach, Mechanisms of Corrosion of Steel in Concrete, ASTM STP 1065, p.174, Philadelphia, 1990
14	C. Arya and P. R. W. Vassie, Cement and Concrete Research 25, 989 (1995)
15	B. Elsener, Cement and Concrete Composites 24, 65 (2002)
16	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
17	H. P. Lee and K. Nobe, Journal of Electrochemical Society 133, 2035 (1986)
18	ASTM C 876-91, Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete, ASTM, Philadelphia, PA, 1994
19	M. Raupach and P. P. Schiessl, Construction and Building Materials 11, 207 (1997)