Which risk increases when concrete rebar nears chloride exposure threshold after de-icing salt application?

💡 Explanation

When chloride concentration at the rebar surface reaches critical threshold, corrosion of steel rebar accelerates because chloride ions break down the passive oxide layer through depolarization, enhancing oxidation near the steel. Therefore corrosion risk rises, rather than reduced ductility, bond strength, or creep, which involve different chemical or mechanical processes.

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