Electrochemical investigation of carbon-based conductive coatings for application as anodes in ICCP system of reinforced concrete structures
- Carbon‐based conductive coatings are complex composites, consisting of an organic or inorganic binder and conductive carbon components, for application as anodes in impressed current cathodic protection systems of reinforced concrete structures. The electrochemical properties of three coatings at different humidity and in saturated calcium hydroxide solution were studied by electrochemical methods, such as electrochemical impedance measurement, measuring of open circuit potential over time and galvanostatic polarization. The dissolved organic and inorganic carbons in electrolyte solution were quantified by using a photometric method. The structures of the coatings were investigated before and after the electrochemical tests by microscopy and scanning electron microscope/EDX analysis. The results of the electrochemical impedance measurements show that the tested coatings all have a relatively low resistance, which is between 100 and 200V. The binder and the surface porosity influenceCarbon‐based conductive coatings are complex composites, consisting of an organic or inorganic binder and conductive carbon components, for application as anodes in impressed current cathodic protection systems of reinforced concrete structures. The electrochemical properties of three coatings at different humidity and in saturated calcium hydroxide solution were studied by electrochemical methods, such as electrochemical impedance measurement, measuring of open circuit potential over time and galvanostatic polarization. The dissolved organic and inorganic carbons in electrolyte solution were quantified by using a photometric method. The structures of the coatings were investigated before and after the electrochemical tests by microscopy and scanning electron microscope/EDX analysis. The results of the electrochemical impedance measurements show that the tested coatings all have a relatively low resistance, which is between 100 and 200V. The binder and the surface porosity influence the degradation behavior of those coatings. Especially the organic binder reacts with the strong alkaline medium under dissolving of organic carbon.…
Autor*innen: | Gino EbellORCiD, Marina Poltavtseva, Jürgen Mietz |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | EUROCORR 2014 - European corrosion congress |
Jahr der Erstveröffentlichung: | 2014 |
Herausgeber (Institution): | DECHEMA e.V. |
Erste Seite: | O-7489, 481 |
Letzte Seite: | O-7489, 481 |
Freie Schlagwörter: | Cathodic protection; Concrete; ICCP |
Veranstaltung: | EUROCORR 2014 - European corrosion congress |
Veranstaltungsort: | Pisa, Italy |
Beginndatum der Veranstaltung: | 08.09.2014 |
Enddatum der Veranstaltung: | 12.09.2014 |
ISBN: | 978-3-89746-159-8 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 25.09.2014 |