Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.21/6877
Title: Chloride threshold value to initiate reinforcement corrosion in simulated concrete pore solutions: The influence of surface finishing and pH
Author: Figueira, Rita B.
Sadovski, Andrei
Melo, Ana P.
Pereira, Elsa V.
Keywords: Corrosion
Reinforced concrete
Chloride threshold value
Steel surface
Issue Date: 2017
Publisher: Elsevier
Citation: FIGUEIRA, Rita B.; [et al] – Chloride threshold value to initiate reinforcement corrosion in simulated concrete pore solutions: The influence of surface finishing and pH. Construction and Building Materials. ISSN 0950-0618. Vol. 141, (2017), pp. 183-200.
Abstract: The influence of steel surface finishing and pH of simulated concrete pore solutions (SCPS) on the chloride threshold value (CTV) was evaluated. Steel samples were analysed, with four different finishes: as received (T), diamond-polished (D), polished (P500) and pre-oxidized (DH). The studies were performed in SCPS with pH values of 11.6 and 13.5, and of different chloride concentrations. The electrochemical behaviour of the samples was assessed using open circuit potential, potentiodynamic polarization curves and scanning vibrating electrode techniques. The surface of the steel samples was observed by optical microscopy and SEM/EDS. The results showed that the samples were ranked D > DH > P500 > T for the CTV after which pitting corrosion occurs. The highest chloride threshold value was found in D samples.
Peer review: yes
URI: http://hdl.handle.net/10400.21/6877
DOI: http://dx.doi.org/10.1016/j.conbuildmat.2017.03.004
ISSN: 0950-0618
Publisher Version: http://ac.els-cdn.com/S0950061817303677/1-s2.0-S0950061817303677-main.pdf?_tid=ab509e72-0d4d-11e7-972a-00000aacb362&acdnat=1490001469_52fa7d6d04bf07bc0c1233c4b3e081de
Appears in Collections:ISEL - Eng. Quim. Biol. - Artigos

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