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Effects of Scratch Defects in Epoxy Coating of Steel Reinforcing Bars Embedded in Structural Concrete

Effects of Scratch Defects in Epoxy Coating of Steel Reinforcing Bars Embedded in Structural Concrete
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Epoxy coatings provide excellent physical barrier to the steel reinforcing bars that are embedded in reinforced concrete and prevent chloride ions from reaching the bar surface under corrosive environment. Such protection primarily depends on the integrity of the coatings, which can often be damaged during construction. Repair of epoxy coatings can be time consuming and expensive. Therefore, it is important to determine a critical amount of damage that can be tolerated without compromising the capacity of the coatings to provide corrosion protection. 

Product Number: 41216-968-SG
Author: Zhicheng Gao, Robert Y. Liang, Anil K.
Publication Date: 2016
Industries: Test Method , Corrosion Monitoring and Control , Coatings
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$20.00
$20.00

Epoxy coatings provide excellent physical barrier to the steel reinforcing bars that are embedded in reinforced concrete and prevent chloride ions from reaching the bar surface under corrosive environment. Such protection primarily depends on the integrity of the coatings, which can often be damaged during construction. Repair of epoxy coatings can be time consuming and expensive. Therefore, it is important to determine a critical amount of damage that can be tolerated without compromising the capacity of the coatings to provide corrosion protection. The objective of this study was to establish corrosion behavior of epoxy-coated steel bars with some amount of surface damage under service conditions and to determine an upper limit for surface damage tolerance of the coatings.

Epoxy coatings provide excellent physical barrier to the steel reinforcing bars that are embedded in reinforced concrete and prevent chloride ions from reaching the bar surface under corrosive environment. Such protection primarily depends on the integrity of the coatings, which can often be damaged during construction. Repair of epoxy coatings can be time consuming and expensive. Therefore, it is important to determine a critical amount of damage that can be tolerated without compromising the capacity of the coatings to provide corrosion protection. The objective of this study was to establish corrosion behavior of epoxy-coated steel bars with some amount of surface damage under service conditions and to determine an upper limit for surface damage tolerance of the coatings.

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