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← ScienceWhich risk increases when a steel pipeline experiences sustained electromagnetic interference?
A)Enhanced martensite phase formation
B)Accelerated graphitization of cementite
C)Elevated intergranular corrosion rate✓
D)Increased hydrogen embrittlement susceptibility
💡 Explanation
Elevated electromagnetic interference induces localized electrochemical potential variations, leading to increased intergranular corrosion because grain boundaries become anodic relative to the grain interiors through galvanic action. Therefore, corrosion accelerates rather than phase transformation or embrittlement.
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