Behaviour of corroded steel in a Ca(OH)2-saturated solution and in cement mortar. Possibility of rehabilitation

Authors

  • J. M. Miranda Instituto de Metalurgia, UASLP, México.
  • E. Otero Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC), Madrid
  • J. A. González Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC), Madrid
  • L. S. Hernández Instituto de Metalurgia, UASLP, México.

DOI:

https://doi.org/10.3989/mc.2007.v57.i285.35

Keywords:

steel, cement mortar, corrosion, repassivation, electrochemical techniques

Abstract


The present study compared the response of rust-free and corroded steel electrodes in Ca(OH)2-saturated solutions and in cement mortar, essentially defined in terms of polarization resistance as measured with gravimetric, metallographic and electrochemical methods. Answers were sought for the following questions, which persist despite the use of reinforced concrete (RC) in building for over a century: At what corrosion rate is RC durability seriously compromised? Does restoration of the initial conditions in properly manufactured concrete guarantee repassivation of corroded steel? Does the use of inhibitors enhance repassivation? Does the nature of the corrosion products have any significant effect on the response of corroded steel reinforcement? The results obtained in indicated that the effectiveness of preventive methods is much more closely related to the degree of existing corrosion than to the nature of the corrosion products.

Downloads

Download data is not yet available.

References

(1) Fernández Canovas, M.: “Patología y Terapéutica del Hormigón Armado”. 2ª Edición, Editorial Dossat S.A., Barcelona, 1984, pp. 443-473.

(2) Martínez, R.: “Inhibidores decorrosión para hormigón armado”, Hormigón, nº 38 (1998) 48.

(3) Page, C. L. y Treadaway, K. W. J.: “Aspects of electrochemistry of steel in concrete”, Nature, 297 (nº 5862) (1982) 109. doi:10.1038/297109a0

(4) González, J. A.; Miranda, J. M.; Birbilis, N. y Feliu, S.: “Electrochemical techniques for studying corrosion of reinfor ing steel: Limitations and advantages”, Corrosion, 61 (2005) 37.

(5) Browne, R. D.; Geoghegan, M. P. y Baker, A. F.: “Analysis of structural condition from durability results”, Corrosion of Reinforcement in Concrete Construction, Ed. A.P. Crane. SCI, Londres, 1983, pp. 193-222.

(6) Treadaway, K. W. J.; Macmillan, G.; Hawkins, P. y Fontenay, P.: “The influence of concrete quality of carbonation in Middle Eastern conditions- A preliminary study”, Corrosion of Reinforcement in Concrete Construction. Ed. A.P. Crane. SCI, Londres, 1983, pp. 101-118.

(7) Slater, J. E.; Lankard, D. R. y Moreland, P. J.: “Electrochemical removal of chlorides from concrete bridge decks”, Mater. Perf., 15 (11) (1976) 21.

(8) Elsener, B.; Molina, M. y Böhni, H.: “The electrochemical removal of chloride from hardened concrete paste”, Cem. Concr. Res., 23 (1993) 1095. doi:10.1016/0008-8846(93)90169-A

(9) Mietz, J.: “Electrochemical Rehabilitation Methods for Reinforced Concrete Structures”, Publication nº 24 of the European Federation of Corrosion. The Institute of Materials, Londres, 1998.

(10) Sánchez, M. J.; Garcés, P. y Climent, M. A.: “Extracción electroquímica de cloruros del hormigón armado: Estudio de diferentes variables que influyen en la eficiencia del tratamiento”. Mater. Construcc., nº 284, vol. 56 (2006), pp. 17-26.

(11) Orellan, J. C.; Escadeillas, G. y Arliguie, G.: “Electrochemical chloride extraction: Efficiency and side effects”, Cem. Concr. Res., 34 (2004) 227. doi:10.1016/j.cemconres.2003.07.001

(12) Cobo, A.: “Comprobación de la eficacia de la realcalinización y de la extracción electroquímica de cloruros como métodos de rehabilitación de las estructuras corroídas de hormigón armado”. Tesis Doctoral. Univ. Politécnica de Madrid, ETSICCP. Madrid, 2001.

(13) Miranda, J. M.: “Análisis de las posibilidades de repasivación de las estructuras corroídas de hormigón armado”. Tesis Doctoral, Univ. Complutense de Madrid, Fac. de Ciencias Químicas, Madrid, 2004.

(14) González, J. A.; Ramírez, E.; Bautista, A. y Feliu, S.: “The behaviour of prerusted steel in concrete”, Cem. Concr. Res., 26 (1996), pp. 501-511.

(15) González, J. A.; Algaba, S. y Andrade, C.: “Corrosion of Reinforcing Bars in Carbonated Concrete”, Br. Corros. J., 15 (3) (1980), pp. 135-139.

(16) Stern, M. y Geary, A. L.: “Electrochemical polarization. I: A theoretical analysis of the shape of polarization curves”, J. Electrochem. Soc., 104 (1957), pp. 56-63. doi:10.1149/1.2428473

(17) González, J. A.; Cobo, A.; González, M. N. y Feliu, S.: “On-site determination of corrosion rate in reinforced concrete structures by use of galvanostatic pulses”, Corros. Sci., 43 (2001), pp. 611-625. doi:10.1016/S0010-938X(00)00092-5

(18) Flis, J.; Pickering, H. W. y Osseo-Asare, K.: “Interpretation of impedance data for reinforcing steel in alkaline solution containing chlorides and acetates”, Electrochimica Acta, 43 (1998) 1921. doi:10.1016/S0013-4686(97)10004-4

(19) Andrade, C.; Alonso, C. y Molina, M.: “Cover cracking as a function of bar corrosion. Part I: Experimental test”, Mater. Struct. 26 (1993) 453. doi:10.1007/BF02472805

Downloads

Published

2007-03-30

How to Cite

Miranda, J. M., Otero, E., González, J. A., & Hernández, L. S. (2007). Behaviour of corroded steel in a Ca(OH)2-saturated solution and in cement mortar. Possibility of rehabilitation. Materiales De Construcción, 57(285), 5–16. https://doi.org/10.3989/mc.2007.v57.i285.35

Issue

Section

Research Articles

Similar Articles

1 2 > >> 

You may also start an advanced similarity search for this article.

Most read articles by the same author(s)

1 2 > >>