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← ScienceWhich consequence accelerates corrosion in chloride-exposed reinforced concrete?
A)Iron (II) oxidation to iron (III)✓
B)Passivation layer formation by silica
C)Calcium hydroxide formation increases pH
D)Cementite conversion creates more iron
💡 Explanation
Chloride ions induce pitting corrosion via electrochemical reaction and iron II to iron III oxidation on the rebar surfaces; this is because the oxidizing redox potential increases around chloride ions. This causes localized corrosion rather than passive oxide layer protection, therefore pitting accelerates failing via expansion.
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