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← TechnologyWhich risk increases when epoxy coating is damaged on steel rebar embedded in chloride-contaminated concrete?
A)Accelerated galvanic corrosion of the rebar✓
B)Reduced bond strength between rebar and concrete
C)Increased concrete spalling from freeze-thaw cycles
D)Elevated concrete temperature from exothermic reaction
💡 Explanation
When the epoxy coating is breached especially by chloride exposure, accelerated galvanic corrosion occurs because chloride ions promote formation of an electrochemical cell, leading to rapid oxidation of the rebar. Therefore, accelerated corrosion occurs rather than bond reduction, spalling, or temperature increase which are consequences of distinct degradation mechanisms.
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