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Which outcome occurs when hydrogen embrittlement surpasses the design yield-strength?

A)Catastrophic crack propagation
B)Enhanced surface passivation
C)Galvanic corrosion increases
D)Material tensile strength increases

💡 Explanation

Hydrogen embrittlement introduces microscopic cracks. Stress concentrates, and then the mechanism is brittle fracture, because applied stress exceeds the material’s weakened cohesive strength. Therefore, catastrophic crack propagation occurs, rather than passivation/corrosion which are electrochemical processes.

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