Title
Aminobenzoate modified MgAl hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications
Author
Yang, Z.
Fischer, H.R.
Cerezo, J.
Mol, J.M.C.
Polder, R.B.
Publication year
2013
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. © 2013 Elsevier Ltd. All rights reserved.
Subject
Building Engineering & Civil Engineering Mechatronics, Mechanics & Materials
MIP - Materials for Integrated Products BM - Building Materials SR - Structural Reliability
TS - Technical Sciences
Buildings and Infrastructure
Materials
Built Environment
Chloride scavenger
Modified hydrotalcites
Reinforced concrete
Smart additives
Chloride concentrations
Chloride scavenger
Corrosion initiation
Hydrotalcites
Inhibiting effect
Mg-Al hydrotalcite
Open circuit potential
Simulated concrete pore solution
Additives
Carbon steel
Chlorine compounds
Concretes
Corrosion protection
Corrosion resistance
Ion exchange
Reinforced concrete
Aluminum
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TNO identifier
476221
ISSN
0950-0618
Source
Construction and Building Materials, 47, 1436-1443
Document type
article