Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Electrochemical study on inhibitors of rebar corrosion in carbonated concrete
AbstractElectrochemical Impedance Spectroscopy (EIS) was used to evaluate the inhibitive action of some organic compounds towards the corrosion of a carbon steel, both in a solution simulating the pore chemistry of carbonated concrete and in carbonated concrete.The synthetic solution (SS) has been made by bubbling pure CO2 in a saturated Ca(OH)2 solution till obtaining pH 7 and then filtering it. Concrete carbonation has been obtained by maintaining the concrete specimens in CO2 atmosphere for 80 days, at 68% RH and room temperature.In SS, benzoate, its amino-derivatives and dicarboxylates were able to form a long-lasting passive layer on the steel surface. Their efficiency improved with time.In carbonated concrete the additives inducing a decrease in the concrete compressive strength were discarded. Some compounds were monitored for up to 400 days, but only two (the sodium salts of benzoic acid and, particularly, 2-amino benzoic acid) exhibited some inhibitive effect towards the rebar corrosion process.
Electrochemical study on inhibitors of rebar corrosion in carbonated concrete
AbstractElectrochemical Impedance Spectroscopy (EIS) was used to evaluate the inhibitive action of some organic compounds towards the corrosion of a carbon steel, both in a solution simulating the pore chemistry of carbonated concrete and in carbonated concrete.The synthetic solution (SS) has been made by bubbling pure CO2 in a saturated Ca(OH)2 solution till obtaining pH 7 and then filtering it. Concrete carbonation has been obtained by maintaining the concrete specimens in CO2 atmosphere for 80 days, at 68% RH and room temperature.In SS, benzoate, its amino-derivatives and dicarboxylates were able to form a long-lasting passive layer on the steel surface. Their efficiency improved with time.In carbonated concrete the additives inducing a decrease in the concrete compressive strength were discarded. Some compounds were monitored for up to 400 days, but only two (the sodium salts of benzoic acid and, particularly, 2-amino benzoic acid) exhibited some inhibitive effect towards the rebar corrosion process.
Electrochemical study on inhibitors of rebar corrosion in carbonated concrete
Trabanelli, G. (Autor:in) / Monticelli, C. (Autor:in) / Grassi, V. (Autor:in) / Frignani, A. (Autor:in)
Cement and Concrete Research ; 35 ; 1804-1813
07.12.2004
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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