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A localised electrochemical investigation into the performance of concrete corrosion inhibitors uner simulated pore solution conditions
The use of concrete corrosion inhibitors is becoming a widely accepted technique for the repair and maintenance of concrete structures. However, the various commercially available inhibitors differ not only in their respective formulations, but also in their mechanisms of corrosion inhibition for mild steel reinforcement. Manufacturers claim that the latest multi-functional corrosion inhibitors based on organic and inorganic film-forming blends of aminoalcohol compounds provide both anodic and cathodic inhibition by adsorption at the steel/concrete interface. In order to assess the functionality of such inhibitors, localised electrochemical impedance spectroscopy (LEIS) and other associated techniques have been used to examine the adsorption of an amino-alcohol based concrete corrosion inhibitor at the surface of mild steel under simulated pore solution conditions. It is claimed, by the manufacturers of these inhibitors, that they diffuse through the concrete in both a liquid and vapour phase to form an adsorbed layer at the steel/concrete interface which is typically in the order of 0.01 micron to 0.1 micron in thickness. Experiments have shown that measured variations in localised impedance can be associated with the formation and breakdown of passive films formed on the surface of mild steel and the adsorption of the inhibitor at the steel/electrolyte interface.
A localised electrochemical investigation into the performance of concrete corrosion inhibitors uner simulated pore solution conditions
The use of concrete corrosion inhibitors is becoming a widely accepted technique for the repair and maintenance of concrete structures. However, the various commercially available inhibitors differ not only in their respective formulations, but also in their mechanisms of corrosion inhibition for mild steel reinforcement. Manufacturers claim that the latest multi-functional corrosion inhibitors based on organic and inorganic film-forming blends of aminoalcohol compounds provide both anodic and cathodic inhibition by adsorption at the steel/concrete interface. In order to assess the functionality of such inhibitors, localised electrochemical impedance spectroscopy (LEIS) and other associated techniques have been used to examine the adsorption of an amino-alcohol based concrete corrosion inhibitor at the surface of mild steel under simulated pore solution conditions. It is claimed, by the manufacturers of these inhibitors, that they diffuse through the concrete in both a liquid and vapour phase to form an adsorbed layer at the steel/concrete interface which is typically in the order of 0.01 micron to 0.1 micron in thickness. Experiments have shown that measured variations in localised impedance can be associated with the formation and breakdown of passive films formed on the surface of mild steel and the adsorption of the inhibitor at the steel/electrolyte interface.
A localised electrochemical investigation into the performance of concrete corrosion inhibitors uner simulated pore solution conditions
Morlidge, J.R. (Autor:in) / Badger, S. (Autor:in) / Bigland, D.J. (Autor:in) / Sergi, G. (Autor:in)
2000
11 Seiten, 6 Bilder, 37 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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