Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion.
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ABM, ABC, ABPol
2012
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oai:scielo:S1516-143920120001000092012-02-23Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attackChaparro,William AperadorRuiz,Jorge Hernando BautistaGómez,Robinson de Jesús Torres corrosion alkali-activated cement chloride ion electrochemical measurements Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion.info:eu-repo/semantics/openAccessABM, ABC, ABPolMaterials Research v.15 n.1 20122012-02-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100009en10.1590/S1516-14392011005000096 |
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Chaparro,William Aperador Ruiz,Jorge Hernando Bautista Gómez,Robinson de Jesús Torres |
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Chaparro,William Aperador Ruiz,Jorge Hernando Bautista Gómez,Robinson de Jesús Torres Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
author_facet |
Chaparro,William Aperador Ruiz,Jorge Hernando Bautista Gómez,Robinson de Jesús Torres |
author_sort |
Chaparro,William Aperador |
title |
Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
title_short |
Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
title_full |
Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
title_fullStr |
Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
title_full_unstemmed |
Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
title_sort |
corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack |
description |
Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion. |
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ABM, ABC, ABPol |
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2012 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100009 |
work_keys_str_mv |
AT chaparrowilliamaperador corrosionofreinforcingbarsembeddedinalkaliactivatedslagconcretesubjectedtochlorideattack AT ruizjorgehernandobautista corrosionofreinforcingbarsembeddedinalkaliactivatedslagconcretesubjectedtochlorideattack AT gomezrobinsondejesustorres corrosionofreinforcingbarsembeddedinalkaliactivatedslagconcretesubjectedtochlorideattack |
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1756420400507518976 |