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← ScienceWhich outcome occurs when high humidity introduces chloride ions?
A)Increased galvanic corrosion near steel rebar✓
B)Decreased formation of passivating surface oxides
C)Accelerated cathodic protection of steel
D)Reduced concrete spalling from freeze-thaw cycles
💡 Explanation
Galvanic corrosion is accelerated because chloride ions increase electrolyte conductivity, promoting electron flow between dissimilar metals in steel and rebar. Therefore corrosion increases, rather than cathodic protection increasing, under humid conditions.
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