Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Aminobenzoate modified MgAl hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications
Graphical abstract Display Omitted
Highlights The anticorrosion behavior of modified hydrotalcites (MHTs) was evaluated. MHTs have a twofold beneficial effect against chloride-induced corrosion. Ion-exchange between chloride and aminobenzoate reduced free chloride concentration. Critical chloride concentration for initiating corrosion was increased by MHTs. MHTs could be a promising additive of concrete for improved corrosion protection.
Abstract A carbonate form of MgAl hydrotalcite, Mg(2)Al-CO3 and its p-aminobenzoate (pAB) modified derivative, Mg(2)Al-pAB, were synthesized and characterized by means of XRD, FT-IR and TG/DSC. The anticorrosion behavior of Mg(2)Al-pAB was evaluated based on open circuit potential (OCP) of carbon steel in simulated concrete pore solution and on chloride-exchange experiments. The results reported in this paper demonstrate that ion-exchange indeed occurred between chlorides and intercalated pAB anions, thereby reducing the free chloride concentration in simulated concrete pore solution. The simultaneously released pAB anions were found to exhibit the envisioned inhibiting effect and caused corrosion initiation of the steel to shift to higher chloride concentrations than without the modified hydrotalcites.
Aminobenzoate modified MgAl hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications
Graphical abstract Display Omitted
Highlights The anticorrosion behavior of modified hydrotalcites (MHTs) was evaluated. MHTs have a twofold beneficial effect against chloride-induced corrosion. Ion-exchange between chloride and aminobenzoate reduced free chloride concentration. Critical chloride concentration for initiating corrosion was increased by MHTs. MHTs could be a promising additive of concrete for improved corrosion protection.
Abstract A carbonate form of MgAl hydrotalcite, Mg(2)Al-CO3 and its p-aminobenzoate (pAB) modified derivative, Mg(2)Al-pAB, were synthesized and characterized by means of XRD, FT-IR and TG/DSC. The anticorrosion behavior of Mg(2)Al-pAB was evaluated based on open circuit potential (OCP) of carbon steel in simulated concrete pore solution and on chloride-exchange experiments. The results reported in this paper demonstrate that ion-exchange indeed occurred between chlorides and intercalated pAB anions, thereby reducing the free chloride concentration in simulated concrete pore solution. The simultaneously released pAB anions were found to exhibit the envisioned inhibiting effect and caused corrosion initiation of the steel to shift to higher chloride concentrations than without the modified hydrotalcites.
Aminobenzoate modified MgAl hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications
Yang, Zhengxian (Autor:in) / Fischer, H. (Autor:in) / Cerezo, J. (Autor:in) / Mol, J.M.C. (Autor:in) / Polder, R. (Autor:in)
Construction and Building Materials ; 47 ; 1436-1443
17.06.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2012
| British Library Online Contents | 2013
| British Library Conference Proceedings | 2012
| British Library Online Contents | 2013