Which risk increases when steel-reinforced concrete support columns experience prolonged chloride ion penetration?

💡 Explanation

When chloride ions penetrate concrete, electrochemical corrosion of the reinforcing steel (rebar) occurs because the passivating oxide layer is disrupted, reducing rebar cross-section and load-bearing capacity which causes the column to buckle. Therefore buckling is more likely, contrasted overheating, spalling and shear failure because these are due alternative factors.

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