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51314-4118-Chloride Corrosion Threshold Dependence on Steel Potential in Reinforced Concrete - Added Evaluation

Picture for Chloride Corrosion Threshold Dependence on Steel Potential in Reinforced Concrete - Added Evaluation
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Product Number: 51314-4118-SG
ISBN: 4118 2014 CP
Author: Andrea Sanchez
Publication Date: 2014
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$20.00
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In reinforced concrete structures exposed to marine environments corrosion initiates when the chloride ion concentration at the surface of the embedded steel bar exceeds a chloride corrosion threshold (CT) value. CT is generally assumed to have a conservative fixed value between 0.2-0.4% by weight of cement. However over the last 40 years there have been extensive experimental investigations on chloride corrosion threshold confirming that CT is not a fixed value and that depends on many variables. The potential of the steel while it is in its passive state is one those; marked reductions in CT are associated with more negative pre-activation potentials. Experimental measurements of the effect can be found in the literature but for a limited set of conditions. Experiments were designed and conducted here for more detailed assessment. The results were analyzed statistically along with previous data to identify trends and corresponding descriptive parameters. A formulation with CT = CT0 10^(E-E0)/bCT was used and values of the respective were parameters proposed.
In reinforced concrete structures exposed to marine environments corrosion initiates when the chloride ion concentration at the surface of the embedded steel bar exceeds a chloride corrosion threshold (CT) value. CT is generally assumed to have a conservative fixed value between 0.2-0.4% by weight of cement. However over the last 40 years there have been extensive experimental investigations on chloride corrosion threshold confirming that CT is not a fixed value and that depends on many variables. The potential of the steel while it is in its passive state is one those; marked reductions in CT are associated with more negative pre-activation potentials. Experimental measurements of the effect can be found in the literature but for a limited set of conditions. Experiments were designed and conducted here for more detailed assessment. The results were analyzed statistically along with previous data to identify trends and corresponding descriptive parameters. A formulation with CT = CT0 10^(E-E0)/bCT was used and values of the respective were parameters proposed.
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