The Study to the Corrosion of Reinforcing Steel in Concrete by Using Galvanostatic Pulse Technique

Abstract:

This paper presents the result from a study of Galvanostatic Pulse Technique for determining the corrosion rate of steel in reinforced concrete. The investigation to the condition factors and instrument parameter that significantly influence the testing result of the current pulse technique in on-site measurements is made in this paper. Firstly standard specimens which have different thickness of concrete cover and NaCl adding content were prepared, and instruments (CorroMap TM) for field measurement of corrosion rate of steel in reinforced concrete are selected for testing. From the study we can conclude that Icorr increased with the decreasing of the thickness of the concrete cover and the adding content of NaCl to the concrete when casting with non-linear rule, and an anodic pulse of 50 μA with pulse duration of 10 seconds is appropriate for testing both passive and active area of rebar.

• Periodical: Applied Mechanics and Materials (Volumes 501-504)
• Pages: 916-919
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.501-504.916
• Online since: January 2014
• Authors: Yan Tao Dou, Bao Hong Hao, Bo Meng, Jun Xie, Ming Liang Dong, Ao Lin Zhang
• Keywords: Corrosion, Galvanostatic Pulse Technique, Reinforced Steel

References

[1] J. van der Geer, J.A.J. Hanraads, R.A. Lupton, The art of writing a scientific article, J. Sci. Commun. 163 (2000) 51-59.

[1] American Society for Testing and Materials, Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete, C876-91, ASTM, Philadelphia, PA, (1991).

[2] Millard, S. G, Gowers, K. R, and Gill, R. P, Practical Field Measurement of Reinforcement Corrosion in Concrete Using Linear Polarization Methods, British Journal of Non-Destructive Testing. 34 (1992) 444-452.

[3] Bulu Pradhan, B. Bhattacharjee. Performance evaluation of rebar in chloride contaminated concrete by corrosion rate, Construction and Building Materials. 23 (2009) 2346-2356.

DOI: 10.1016/j.conbuildmat.2008.11.003

[4] Zivica, V. Possibility of improvement of potentio-dynamic method for monitoring corrosion rate of steel reinforcement in concrete. Bull. Mater, Sci. 24 (2001) 555-558.

DOI: 10.1007/bf02706730

[5] Andrade, C., Alonso, C, and Sarria, J. Corrosion rate evolution in concrete structures exposed to the atmosphere, Cement and Concrete Composites. 24 (2002) 55-64.

DOI: 10.1016/s0958-9465(01)00026-9

[6] Kouˇril, M, Nov´ak, P, and Bojko M, Limitations of the linear polarization method to determine stainless steel corrosion rate in concrete environment, Cement &Concrete Composites. 28 (2006) 220-225.

DOI: 10.1016/j.cemconcomp.2006.01.007

[7] So, H-S, Millard, S. G, Electrochemical transient techniques for the evaluation of reinforcement corrosion in concrete. Insight: Non-destructive testing and condition monitoring, 47 (2007) 390-396.

DOI: 10.1784/insi.2007.49.7.390