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02259 Steel Activation in Concrete Following Interruption of Long Term Cathodic Polarization

Product Number: 51300-02259-SG
ISBN: 02259 2002 CP
Author: Francisco J. Presuel, Alberto A. Sagüés, S.C. Kranc
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A set of partially immersed reinforced concrete columns with mature corrosion patterns was used to demonstrate that corrosion macrocell currents provided “cathodic prevention” to parts of the steel assembly that remained passive even though exposed to high chloride (~ 4.7% of the cement weight) concrete. Depassivation of that steel was observed upon macrocell decoupling. Keywords: Cathodic Prevention, Polarization, Rebar, Concrete
A set of partially immersed reinforced concrete columns with mature corrosion patterns was used to demonstrate that corrosion macrocell currents provided “cathodic prevention” to parts of the steel assembly that remained passive even though exposed to high chloride (~ 4.7% of the cement weight) concrete. Depassivation of that steel was observed upon macrocell decoupling. Keywords: Cathodic Prevention, Polarization, Rebar, Concrete
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