Which failure mode is primarily mitigated by epoxy coating on prestressing steel strands?

💡 Explanation

When chlorides penetrate concrete and reach prestressing steel, galvanic corrosion occurs because chloride ions accelerate the electrochemical reaction between anodic and cathodic regions on the steel surface. Epoxy coating prevents this direct contact, therefore mitigating galvanic corrosions, rather than creep, embrittlement, or fatigue, which have distinct mechanisms.

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