Print Email Facebook Twitter Corrosion Performance of Carbon Steel in Simulated Pore Solution in the Presence of Micelles Title Corrosion Performance of Carbon Steel in Simulated Pore Solution in the Presence of Micelles Author Hu, J. Koleva, D.A. De Wit, J.H.W. Kolev, H. Van Breugel, K. Faculty Civil Engineering and Geosciences Department Design and Construction Date 2011-01-20 Abstract This study presents the results on the investigation of the corrosion behavior of carbon steel in model alkaline medium in the presence of very low concentration of polymeric nanoaggregates [0.0024 wt % polyethylene oxide (PEO)113-b-PS70 micelles]. The steel electrodes were investigated in chloride free and chloride-containing cement extracts. The electrochemical measurements (electrochemical impedance spectroscopy and potentiodynamic polarization) indicate that the presence of micelles alters the composition of the surface layers (i.e., micelles were indeed absorbed to the steel surface) and influences the electrochemical behavior of the steel, i.e., the micelles lead to an initially increased corrosion resistance of the steel whereas no significant improvement was observed within longer immersion periods. Surface analysis, performed by environmental scanning electronic microscopy, energy-dispersive x-ray analysis, and x-ray photoelectron spectroscopy, supports and elucidates the corrosion performance. The product layers in the micelles-containing specimens are more homogenous and compact, presenting protective ?-Fe2O3 and/or Fe3O4, whereas the product layers in the micelles-free specimens exhibit mainly FeOOH, FeO, and FeCO3, which are prone to chloride attack. Therefore, the increased “barrier effects” along with the layers composition and altered surface morphology denote for the initially increased corrosion resistance of the steel in chloride-containing alkaline medium in the presence of micelles. Subject aggregates (materials)carbon steelcolloidscorrosion resistanceelectrochemical electrodeselectrochemical impedance spectroscopynanocompositespolymersscanning electron microscopysurface morphologyX-ray chemical analysisX-ray photoelectron spectra To reference this document use: http://resolver.tudelft.nl/uuid:96496c82-aa78-4df8-bc4a-e21af388132b DOI https://doi.org/10.1149/1.3534796 Publisher The Electrochemical Society ISSN 0013-4651 Source https://doi.org/10.1149/1.3534796 Source Journal of the Electrochemical Society, 158 (3), 2011 Part of collection Institutional Repository Document type journal article Rights © 2011 The Author(s)The Electrochemical Society Files PDF Hu_2011.pdf 1.81 MB Close viewer /islandora/object/uuid:96496c82-aa78-4df8-bc4a-e21af388132b/datastream/OBJ/view