Identification on acidification damage of external anode system induced by impressed current cathodic protection for reinforced concrete

Jie Hu; Yangyang Wang; Yuwei Ma; Jiangxiong Wei; Qijun Yu; Jie Hu; Yangyang Wang; Yuwei Ma; Jiangxiong Wei; Qijun Yu

doi:10.3934/mbe.2019377

Mathematical Biosciences and Engineering

2019, Volume 16, Issue 6: 7510-7525. doi: 10.3934/mbe.2019377

Previous Article Next Article

Research article Special Issues

Identification on acidification damage of external anode system induced by impressed current cathodic protection for reinforced concrete

1.
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
2.
Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou 510006, China

Received: 16 May 2019 Accepted: 09 August 2019 Published: 19 August 2019

Impressed current cathodic protection (ICCP) was widely applied for the corrosion control of reinforced concrete. During the ICCP treatment, the anodic reactions happened on the primary anode surface may induce acidification and subsequently pH drop in the vicinity of the anode, leading to damage of the external anode mortar. In this study, the relationship between the applied current (simulating ICCP treatment) on the Ti mesh anode and pH alterations in simulated concrete pore (SCP) solution (with/without chlorides) was investigated. It was found that the applied current slightly reduced the corrosion resistance of Ti mesh; this negative effect was more pronounced in the presence of chlorides. The pH value of SCP solution near Ti mesh anode decreased when the external current was applied. The consumption rate of OH^– ion was higher in the chloride-containing SCP solution. A mathematical model was proposed between the electric charge quantity (Q) and OH^– concentration (cOH^–) in SCP solution near Ti mesh anode. This model is a useful tool to quantitatively identify the acidification damage induced by impressed current from the perspective of pH alternation near Ti mesh anode.
- impressed current cathodic protection,
- acidification damage,
- pH alteration,
- mathematical model,
- external anode system
Citation: Jie Hu, Yangyang Wang, Yuwei Ma, Jiangxiong Wei, Qijun Yu. Identification on acidification damage of external anode system induced by impressed current cathodic protection for reinforced concrete[J]. Mathematical Biosciences and Engineering, 2019, 16(6): 7510-7525. doi: 10.3934/mbe.2019377

Related Papers:

Abstract

Impressed current cathodic protection (ICCP) was widely applied for the corrosion control of reinforced concrete. During the ICCP treatment, the anodic reactions happened on the primary anode surface may induce acidification and subsequently pH drop in the vicinity of the anode, leading to damage of the external anode mortar. In this study, the relationship between the applied current (simulating ICCP treatment) on the Ti mesh anode and pH alterations in simulated concrete pore (SCP) solution (with/without chlorides) was investigated. It was found that the applied current slightly reduced the corrosion resistance of Ti mesh; this negative effect was more pronounced in the presence of chlorides. The pH value of SCP solution near Ti mesh anode decreased when the external current was applied. The consumption rate of OH^– ion was higher in the chloride-containing SCP solution. A mathematical model was proposed between the electric charge quantity (Q) and OH^– concentration (cOH^–) in SCP solution near Ti mesh anode. This model is a useful tool to quantitatively identify the acidification damage induced by impressed current from the perspective of pH alternation near Ti mesh anode.

References

[1]	R. B. Polder, W. H. A. Peelen and M. Raupach, Economic effects of full corrosion surveys for aging concrete structures, Mater. Corros., 64 (2013), 105–110.
[2]	G. Campione, F. Cannella, L. Cavaleri, et al., Moment-axial force domain of corroded R.C. columns, Mater. Struct., 50 (2017), 21.
[3]	M. M. Mennucci, E. P. Banczek, P. R. P. Rodrigues, et al., Evaluation of benzotriazole as corrosion inhibitor for carbon steel in simulated pore solution, Cem. Concr. Comp., 31 (2009), 418–424.
[4]	K. C. Clear, Measuring rate of corrosion of steel in field concrete structures, Washington: Transportation Research Board, 1989.
[5]	D. V. Val, Deterioration of strength of RC beams due to corrosion and its influence on beam reliability, ASCE J. Struct. Eng., 133 (2007), 1297–1306.
[6]	G. Campione, F. Cannella and L. Cavaleri, Shear and flexural strength prediction of corroded R.C. beams, Constr. Build. Mater., 149 (2017), 395–405.
[7]	L. Bertolini, B. Elsener, P. Pedeferri, et al., Corrosion of steel in concrete: prevention, diagnosis, repair. John Wiley & Sons, 2013.
[8]	S. Pour-Ali, C. Dehghanian and A. Kosari, Corrosion protection of the reinforcing steels in chloride-laden concrete environment through epoxy/polyaniline-camphorsulfonate nanocomposite coating, Corros. Sci., 90 (2015), 239–241.
[9]	X. Zhou, H. Yang and F. Wang, Investigation on the inhibition behavior of a pentaerythritol glycoside for carbon steel in 3.5% NaCl saturated Ca(OH)₂ solution, Corros. Sci., 54 (2012), 193–195.
[10]	J. Carmona, P. Garcés and M. A. Climent, Efficiency of a conductive cement-based anodic system for the application of cathodic protection, cathodic prevention and electrochemical chloride extraction to control corrosion in reinforced concrete structures, Corros. Sci., 96 (2015), 102–106.
[11]	P. Pedeferri, Cathodic protection and cathodic prevention, Constr. Build. Mater., 10 (1996), 391.
[12]	D. A. Koleva, Corrosion and protection in reinforced concrete Pulse cathodic protection: an improved cost-effective alternative, Ph.D Thesis, TU Delft, The Netherlands, 2007.
[13]	C. J. Weale, Cathodic protection of reinforced concrete: anodic processes in cement and related electrolytes, Ph.D Thesis, Aston University, United Kingdom, 1992.
[14]	C. Christodoulou, G. Glass, J. Webb, et al., Assessing the long term benefits of impressed current cathodic protection, Corros. Sci., 52 (2010), 2671–2679.
[15]	K. Wilson, M. Jawed and V. Ngala, The selection and use of cathodic protection systems for the repair of reinforced concrete structures, Constr. Build. Mater., 39 (2013), 19–23.
[16]	B. Elsener, Long‐term durability of electrochemical chloride extraction, Mater. Corros., 59 (2008), 91–97.
[17]	J. Xu and W. Yao, Current distribution in reinforced concrete cathodic protection system with conductive mortar overlay anode, Constr. Build. Mater., 23 (2009), 2220–2226.
[18]	L. Bertolini, F. Bolzoni and T. Pastore, Effectiveness of a conductive cementitious mortar anode for cathodic protection of steel in concrete, Cem. Concr. Res., 34 (2004), 681–684.
[19]	L. Bertolini, F. Bolzoni and P. Pedeferri, Cathodic protection and cathodic prevention in concrete: principles and applications, J. App. Electrochem., 28 (1998), 1321–1323.
[20]	H. McArthur, S. D'Arcy and T. Barker, Cathodic protection by impressed DC currents for construction, maintenance and refurbishment in reinforced concrete, Constr. Build. Mater., 7 (1993), 85–88.
[21]	W. H. A. Peelen, R. B. Polder and E. Redaelli, Qualitative model of concrete acidification due to cathodic protection, Mater. Corros., 59 (2008), 81–84.
[22]	W. Green, F. Andrews-Phaedonos, G. Brewster, et al., Lynch's Bridge: a case study in the cathodic protection of reinforced concrete, 41st Australasian Corrosion Association Conference, Newcastle, New South Wales, Australia 18-21 November 2011.
[23]	P. Ghods, O. B. Isgor and G. Mcrae, The effect of concrete pore solution composition on the quality of passive oxide films on black steel reinforcement, Cem. Concr. Compos., 31 (2009), 2–7.
[24]	A. Leemann, B. Lothenbach and C. Thalmann, Influence of superplasticizers on pore solution composition and on expansion of concrete due to alkali-silica reaction, Constr. Build. Mater., 25 (2011), 344–348.
[25]	M. Moreno, W. Morris and M. G. Alvarez, Corrosion of reinforcing steel in simulated concrete pore solutions: Effect of carbonation and chloride content, Corros. Sci., 46 (2004), 2681–2685.
[26]	M. Saremi and E. Mahallati, A study on chloride-induced depassivation of mild steel in simulated concrete pore solution, Cem. Concr. Res., 32 (2002), 1915–1921.
[27]	F. Zhang, J. Pan and C. Lin, Localized corrosion behaviour of reinforcement steel in simulated concrete pore solution, Corros. Sci., 51 (2009), 2130–2133.
[28]	J. Xu and W. Yao, Electrochemical studies on the performance of conductive overlay material in cathodic protection of reinforced concrete, Constr. Build. Mater., 25 (2011), 2655–2631.
[29]	D. A. Koleva, J. H. W. de Wit, K. van Breugel, et al., Investigation of corrosion and cathodic protection in reinforced concrete: I. Application of electrochemical techniques interdisciplinary topics, J. Electrochem. Soc., 154 (2007), 52–55.

Reader Comments

Your name:*

Email:*
© 2019 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)