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51316-7766-Modeling and Control of Localized Corrosion of Steel in Submerged Reinforced Concrete Structures

Picture for Modeling and Control of Localized Corrosion of Steel in Submerged Reinforced Concrete Structures
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Product Number: 51316-7766-SG
ISBN: 7766 2016 CP
Author: Michael T. Walsh
Publication Date: 2016
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A structural life prediction model that quantitatively forecasts corrosion damage in submerged concrete in marine environments has been created. The model incorporates Potential Dependent Threshold (PDT) features and determines the damage function for affected structures. Model has been validated via comparison with findings of parallel field examinations of extracted piles. The model is used to evaluate the influence of structural and material parameters on extent of corrosion damage plus the feasibility and benefits of deploying galvanic cathodic protection anodes for supplemental corrosion control over an extended service life period. Results indicate the propensity for severe localized corrosion (despite expected low average corrosion rates) given strong corrosion macrocell action facilitated by lower resistivity of water-saturated concrete. Results also contribute to an improved understanding of the underlying phenomena and identification of corrosion-related limit states that may be useful in the development of methods of electrochemical corrosion control of steel in concrete.
A structural life prediction model that quantitatively forecasts corrosion damage in submerged concrete in marine environments has been created. The model incorporates Potential Dependent Threshold (PDT) features and determines the damage function for affected structures. Model has been validated via comparison with findings of parallel field examinations of extracted piles. The model is used to evaluate the influence of structural and material parameters on extent of corrosion damage plus the feasibility and benefits of deploying galvanic cathodic protection anodes for supplemental corrosion control over an extended service life period. Results indicate the propensity for severe localized corrosion (despite expected low average corrosion rates) given strong corrosion macrocell action facilitated by lower resistivity of water-saturated concrete. Results also contribute to an improved understanding of the underlying phenomena and identification of corrosion-related limit states that may be useful in the development of methods of electrochemical corrosion control of steel in concrete.
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