Abstract
The half cell potential (HCP) and corrosion current of reinforced concrete specimens doped with sodium chloride were determined after electrochemical chloride extraction (ECE). The experimental results show that when ECE treatment is removed, HCP becomes more negative and corrosion current becomes larger in comparison to those before ECE treatment, then HCP shifts positively and corrosion current decreases with time. After 30 days ECE treatment, the HCP of cored specimens turn to about −100 mV due to the existence of sufficient oxygen around the exposed steel bars, but for un-cored specimens, longer time, about two months, is to be taken. The non-homogeneous HCP distribution at different layers of the same specimen after ECE treatment might induce secondary corrosion of steels.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Helland S. Assessment and Prediction of Service Life of Marine Structures Tool for Performance Based Requirements[M]. Workshop on Design of Durability of Concrete, Berlin, June, 1999
B Elsener, M Molina, H Böhni. The Electrochemical Removal of Chlorides from Reinforced Concrete[J]. Cem. Concr. Res., 1993, 23:1563–1570
J C Orellan, G Escadeillas, G Arliguie. Electrochemical Chloride Extraction: Efficiency and Side Effects[J]. Cem. and Con. Res., 2004, 34:227–234
P Garcés, M J Sánchez de Rojas, M A Climent. Effect of the Reinforcement Bar Arrangement on the Efficiency of Electrochemical Chloride Removal Technique Applied to Reinforced Concrete Structures[J]. Corrosion Science, 2006, 48:531–545
N M Ihekwaba, B B Hope, C M Hansson. Pull-Out and Bond Degradation of Steel Rebars in ECE Concrete[J]. Cem. and Conc.Res., 1996, 26(2): 267–282
Nzeribe M lhekwaba, Brian B Hope. Mechanical Properties of Anodic and Cathodic Regions of ECE Treated Concrete[J]. Cem. and Concr. Res., 1996, 26(5):771–780
X X Wang, C L Deng, Q J Yu. Chloride Migration and Porosity Change Due to Electrochemical Chloride Extraction in Reinforced Concrete[C]. In: Proceedings of the Conference on the 6th International Symposium on cement and concrete, Xi’an China, 2006:1182–1187
T D Marcotte, C M Hansson, B B Hope. The Effect of the Electrochemical Chloride Extraction Treatment on Steel-reinforced Mortar Part I: Electrochemical Measurements[J]. Cem. and Conc.Res., 1999, 29:1555–1560
Zhang Yunlian, Shi Meilun. Introduction of Electrochemical Measurement of Corrosion of Steel in Concrete[J]. Materials Protection, 2005, 38(9):73–75
Mansfeld. Advances in Corrosion Science and Technology[M]. Fontana and Staehle, Plenum Press, 1976:163
Stern M, Geary A L. Electrochemical Polarization. I.A Theoretical Analysis of the Shape of Polarization Curves[J]. J. Electochem. Soc., 1957, 104: 56–63
Luo Gang. Review of Non-destructive Methods in Assessment Corrosion in Reinforced Concrete Member[J]. Fujian Construction, 2002, 4:55–57
X X Wang, C L Deng, Q J Yu. Chloride Migration and Porosity Change Due to Electrochemical Chloride Extraction in Reinforced Concrete[C]. In: Proceedings of the Conference on the 6th International Symposium on Cement and Concrete, Xi’an China, 2006:1182–1187
Zhang Yunlian. Alkali Aggregate Corrosion in Concrete and the Preventing Methods[J]. Corrosion and Protecting, 2002, 22(2):81–82
Xu Ling. Research of Some Problems in Alkali Aggregate Reaction[J]. Hunan Communication Science and Technology, 2006, 32(2):68–71
W K Green, S B Lyon, J D Scantlebury. Electrochemical Changes in Chloride Contaminated Reinforced Concrete Following Cathodic Polarization[J]. Corrosion Science, 1993, 35: 1627–1631
Shen De-jian. Electrochemical Analysis of Reinforcement Corrosion in Concrete and Technology of Accelerated Corrosion Test[J]. Building Technique Development, 2003, 30(2):35–37
She Jianchu. Mechanism and Detection of Corrosion Induced Demolishment of Concrete Structure[J]. Journal of Wuhan University of Technology (Information and Management Engineering), 2004, 26(3):41–43
Zhang Weiping. Elect rochemcial Test Method of Corrosion of Steel in Concrete[J]. Industry Construction, 1998, 28(12):21–26
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Natural Science Foundation of China (No. 50602016), the Science and Technology Promotion Project of Guangdong Province (No.2005B3280100); Research Fund of Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology of Ministry of Education (No. 200500A) and Silicate Material Engineering of Ministry of Education (No. SYSJJ2006-07)
Rights and permissions
About this article
Cite this article
Wang, X., Yu, Q., Deng, C. et al. Change of electrochemical property of reinforced concrete after electrochemical chloride extraction. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 22, 764–769 (2007). https://doi.org/10.1007/s11595-006-4764-9
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11595-006-4764-9