Print Email Facebook Twitter Polarization Behaviour of Silver in Model Solutions Title Polarization Behaviour of Silver in Model Solutions Author Pargar, F. (TU Delft Materials and Environment) Koleva, D.A. (TU Delft Materials and Environment) Date 2017 Abstract When studying chloride-induced corrosion in reinforced concrete structures, essential information of interest is the concentration of chloride ions in the system. The absence of a reliable method for monitoring the free chloride ions justifies the attempts towards establishing a feasible practice in the application of the already known Ag/AgCl electrode, as a chloride sensor. To identify the governing mechanism and cognition of causes for instability of the chloride sensors in highly alkaline medium (as concrete), it is necessary to study the polarization behaviour of silver in different aqueous solutions resembling the concrete environment. Following expectations and well-known fundamental background, the results from this work confirm that in the presence of chloride ions, silver chloride is the predominant reaction product, forming on the silver surface. Whereas, in the absence of chloride ions and/or presence of interfering ions, such as hydroxide ions, the oxidation process of AgCl formation is significantly dependent on the chloride concentration in the medium. Therefore, the formation of a stable AgCl layer on a Ag substrate (as would be required for sensors application for example) is a function of the presence and amount of interfering ions, together with the chloride concentration in the medium. Subject Ag/AgCl electrodechloride sensorconcretepotentiodynamic polarizationalkaline solution To reference this document use: http://resolver.tudelft.nl/uuid:6f7b7c39-fff0-4011-aa3b-808180e0cfc0 DOI https://doi.org/10.18178/ijscer.6.3.172-176 ISSN 2319-6009 Source International Journal of Structural and Civil Engineering Research, 6 (3), 172-176 Part of collection Institutional Repository Document type journal article Rights © 2017 F. Pargar, D.A. Koleva Files PDF 20170907022523204.pdf 1.78 MB Close viewer /islandora/object/uuid:6f7b7c39-fff0-4011-aa3b-808180e0cfc0/datastream/OBJ/view