Effect of steel surface conditions on reinforcing steel corrosion in concrete exposed to marine environments

Authors

  • E. Anzola Universidad Centrooccidcntal Lisandro Alvarado
  • R. Malavé Universidad Centrooccidcntal Lisandro Alvarado
  • A. Contreras Universidad Centrooccidcntal Lisandro Alvarado
  • M. Rivero Universidad Centrooccidcntal Lisandro Alvarado
  • H. Bolognini Universidad Centrooccidcntal Lisandro Alvarado
  • M. Rojas Universidad Centrooccidcntal Lisandro Alvarado
  • I. Reyes Universidad Centrooccidcntal Lisandro Alvarado

DOI:

https://doi.org/10.3989/mc.2005.v55.i279.194

Keywords:

corrosion, surface condition, steel, concrete, bonding

Abstract


Laboratory methods and experimental tests were deployed in the present study to evaluate corrosion in reinforced concrete exposed to marine environments. Reinforcing steel exhibiting two different surface conditions prior to embedment in concrete were studied, one the one hand to assess the electrochemical behaviour of the bars during exposure of the concrete specimens to a simulated marine environment, and on the other to determine the strength of the steel/concrete bond. The reinforced concrete specimens prepared were adapted as required for electrochemical potential and corrosion rate testing. A total of 56 7x15-cm cylindrical specimens containing 3/8" steel rods anchored at a depth of 11.5 cm were made to evaluate the steel / concrete bond and exposed to a natural marine environment for 28 or 190 days prior to testing. All the specimens were made with ready-mixed concrete. It may be concluded from the results of the corrosion tests on reinforcing steel with different surface conditions that the oxide initially covering the bars was dissolved and the steel passivated by the alkalinity in the concrete. The chief finding of the bonding study was that the layer of oxide formed in pre-embedment steel deterioration contributed to establishing a better bond.

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Published

2005-09-30

How to Cite

Anzola, E., Malavé, R., Contreras, A., Rivero, M., Bolognini, H., Rojas, M., & Reyes, I. (2005). Effect of steel surface conditions on reinforcing steel corrosion in concrete exposed to marine environments. Materiales De Construcción, 55(279), 17–24. https://doi.org/10.3989/mc.2005.v55.i279.194

Issue

Section

Research Articles