Which risk increases when concrete chloride levels reach the rebar corrosion threshold in marine structures?

💡 Explanation

When chloride concentration reaches the corrosion threshold, depassivation of the rebar’s protective oxide layer facilitates corrosion because chloride ions promote electrochemical reactions and oxidation. Therefore spalling and weakening occurs, rather than simple oxidation, galvanic corrosions or sulphate because expansive corrosion pressures stress the concrete.

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