METHOD FOR PREDICTING CHLORIDE-INDUCED CORROSION
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United States of America Patent
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May 23, 2013
app pub date -
Nov 23, 2011
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Nov 23, 2011
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Abstract
The method for predicting chloride-induced corrosion, particularly corrosion of steel embedded in concrete, is based on finite-element methods and implemented in a computational program that models and evaluates various durability aspects of concrete, such as concrete hardening (hydration), microstructure formation, corrosion and several associated phenomenon, over time from the casting of the concrete to a period of several months or years, thereafter. The program includes a main model and sub-models for acquisition of data, which is used to compute coupled temperature chloride induced corrosion of steel embedded in concrete under ambient temperature. Micro-cell corrosion is computed using electric potential and current of a corrosion cell obtained from ambient conditions. Using the Arrhenius law, the method numerically evaluates temperature dependency of corrosion rates concerning steel bars embedded in concrete affected by chloride.
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