Skip to content

Research at St Andrews

Electrochemical characteristics of reinforced concrete corrosion as determined by impedance spectroscopy

Research output: Contribution to journalArticlepeer-review

Author(s)

K. K. Sagoe-Crentsil, F. P. Glasser, J. T.S. Irvine

School/Research organisations

Abstract

Corrosion processes affecting steel reinforcements embedded in concrete have been investigated by ac impedance spectroscopy over the frequency range 003 Hz to 103 kHz, using mild steel rods embedded in ordinary Portland cement paste. Corrosion of the reinforcing rods was artificially accelerated by adding 5%NaCl (by weight of cement) to the initial mix and the specimens aged either at 40°C and 100%RH or at ∼20°C in a C02 rich atmosphere at 90%RH. The impedance characteristics prior to and during corrosion were monitored. A correlation is made between the impedance results and the rate of corrosion of the rods obtained by the linear polarisation method. The early stage impedance spectra are dominated by charge transfer controlled kinetics which undergo a transition to diffusion control after prolonged aging. The transition to diffusion control occurs after 90 days’ exposure in the carbonated samples, and is marked by the emergence of an intermediate frequency arc, indicative of the formation of a surface layer on the rods. The relative effects of different environments on the principal stages of the corrosion process are evaluated.

Close

Details

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalBritish Corrosion Journal
Volume27
Issue number2
DOIs
Publication statusPublished - Jan 1992

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Enhancing electrochemical CO2 reduction using Ce(Mn,Fe)O2 with La(Sr)Cr(Mn)O3 cathode for high-temperature solid oxide electrolysis cells

    Lee, S., Kim, M., Lee, K. T., Irvine, J. T. S. & Shin, T. H., 12 May 2021, In: Advanced Energy Materials. Early View, 12 p., 2100339.

    Research output: Contribution to journalArticlepeer-review

  2. Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures

    Price, R., Weissen, U., Grolig, J. G., Cassidy, M., Mai, A. & Irvine, J. T. S., 8 Apr 2021, In: Journal of Materials Chemistry A. 15 p.

    Research output: Contribution to journalArticlepeer-review

  3. Achieving strong coherency for a composite electrode via one-pot method with enhanced electrochemical performance in reversible solid oxide cells

    Tian, Y., Wang, W., Liu, Y., Naden, A., Xu, M., Wu, S., Chi, B., Pu, J. & Irvine, J. T. S., 19 Mar 2021, In: ACS Catalysis. 11, 6, p. 3704-3714 11 p.

    Research output: Contribution to journalArticlepeer-review

  4. Alkaline modified A-site deficient perovskite catalyst surface with exsolved nanoparticles and functionality in biomass valorisation

    Umar, A., Neagu, D. & Irvine, J. T. S., 1 Mar 2021, In: Biofuel Research Journal. 8, 1, p. 1342-1350 9 p.

    Research output: Contribution to journalArticlepeer-review

  5. Non-stoichiometry, structure and properties of proton-conducting perovskite oxides

    Li, S. & Irvine, J. T. S., Mar 2021, In: Solid State Ionics. 361, 115571.

    Research output: Contribution to journalReview articlepeer-review

ID: 267130696

Top