Corrosion Monitoring of Reinforcing Steel in Concrete By Electrochemical Impedance Spectroscopy

Galvanizing on the surface of reinforcing steel is an effective measure to control corrosion of reinforcing concrete structures. The corrosion behaviors of hot-dip galvanized (HDG) reinforcing steel in simulated concrete pore solution (SCP solution) with various pH and chlodride values were investigated using electrochemical impedance spectroscopy (EIS). Two equivalent circuit models corresponding to the corrosion process were proposed and the evolution feature of the corrosion parameters were analyzed. The results show that when the SCP solution was carbonated seriously (pH<11), there is hydrogen evolution phenomenon and the corrosion resistance of HDG reinforcing steel is decreased. A minute carbonation of SCP solution (11.5≤pH<12.5) favors the further passivation of the zinc layer and the corrosion resistance is enhanced. The corrosion rate of HDG reinforcing steel at pH=12.0 is minimal, around 0.59 μm/year, whereas that at pH=12.5 is approximate 1.21 μm/year. In the conditions of pH=12.5 and NaCl concentration no more than 0.5wt.%, the corrosion resistance of the passivation film on HDG reinforcing steel is good. In a serious carbonation case, the corrosion rate is increased greatly with chloride ions.

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Screen-printed atmospheric corrosion monitoring sensor based on electrochemical impedance spectroscopy

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2009.03.027 ◽

2009 ◽

Vol 139 (2) ◽

pp. 292-297 ◽

Cited By ~ 28

Author(s):

Isao Shitanda ◽

Ayaka Okumura ◽

Masayuki Itagaki ◽

Kunihiro Watanabe ◽

Yasufumi Asano

Keyword(s):

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Atmospheric Corrosion ◽

Electrochemical Impedance ◽

Corrosion Monitoring ◽

Screen Printed

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Corrosion monitoring of galvanised coatings through electrochemical impedance spectroscopy

Corrosion Science ◽

10.1016/j.corsci.2008.02.010 ◽

2008 ◽

Vol 50 (6) ◽

pp. 1558-1566 ◽

Cited By ~ 33

Author(s):

Y. Hamlaoui ◽

F. Pedraza ◽

L. Tifouti

Keyword(s):

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Electrochemical Impedance ◽

Corrosion Monitoring

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In Situ Corrosion Monitoring of Mild Steel in a Simulated Tidal Zone without Marine Fouling Attachment by Electrochemical Impedance Spectroscopy

Journal of Material Science and Technology ◽

10.1016/j.jmst.2014.03.013 ◽

2014 ◽

Vol 30 (10) ◽

pp. 1043-1050 ◽

Cited By ~ 11

Author(s):

Xin Mu ◽

Jie Wei ◽

Junhua Dong ◽

Wei Ke

Keyword(s):

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Mild Steel ◽

Electrochemical Impedance ◽

Corrosion Monitoring ◽

Tidal Zone ◽

Marine Fouling

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Corrosion Behavior of HRB400 Reinforcing Steel Based on Electrochemical Impedance Spectroscopy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.105-107.1797 ◽

2011 ◽

Vol 105-107 ◽

pp. 1797-1800

Author(s):

Yu Ye Xu ◽

Bi Lan Lin

Keyword(s):

Corrosion Resistance ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Corrosion Behavior ◽

Electrochemical Impedance ◽

Resistance Index ◽

Chloride Ions ◽

Reinforcing Steel ◽

Kinetics Parameters ◽

Transfer Resistance

Electrochemical impedance spectroscopy (EIS) technique was used to investigate the corrosion behavior of HRB400 reinforcing steel in Simulated Concrete Pore (SCP) solutions differently contaminated by bicarbonate ions and/or chloride ions. The corrosion kinetics parameters of the capacitance Y0-CPEdl, surface roughness n0-CPEdl and charge transfer resistance Rct of the electric double-layer capacitance of the interface of solution/HRB400 were analyzed and were compared to those of HPB235 reinforcing steel. The results show that the corrosion resistance index of HRB400 and HPB235 is increased with an increase in NaCl content to 0.1%, but that is decreased markedly for a larger NaCl content; and that of them is decreased largely with an increase in pH; the decrease extent of the corrosion resistance index of HRB400 with NaCl or pH is larger than that of HPB235; and the corrosion resistance of HRB400 is inferior to that of HPB235.

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