Which risk increases when dissimilar metals connect galvanically in reinforced concrete columns submerged in seawater?

💡 Explanation

When dissimilar metals connect in a wet, saline environment like seawater, galvanic corrosion occurs because the less noble metal corrodes preferentially as electrons flow to the more noble metal. This creates expansive rust that stresses the concrete. Therefore concrete spalling from rust results, rather than buckling, shear failure, or torsional stress which depend on different loading or material defects.

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