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← ScienceWhich outcome occurs when a pure metal casting solidifies non-uniformly?
A)Microsegregation reduces corrosion resistance✓
B)Dendritic growth decreases conductivity
C)Grain refinement halts phase reversion
D)Eutectic formation increases tensile strength
💡 Explanation
During solidification, non-uniform cooling promotes microsegregation due to differential solute distribution, which is a transition process. This separation concentrates impurities at grain boundaries weakening corrosion because corrosion preferentially attacks solute-rich areas rather than a uniform metal matrix.
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