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← ScienceWhich outcome occurs when rapid hydrogen evolution surpasses diffusion rates in steel?
A)Accelerated stress corrosion cracking✓
B)Formation of iron oxides increases
C)Austenite transforms to martensite
D)Passivation layer becomes more stable
💡 Explanation
If hydrogen evolution exceeds diffusion, hydrogen embrittlement becomes likely because the concentration builds up at grain boundaries causing reduced cohesion; therefore stress corrosion cracking accelerates dramatically rather than surface oxidation or phase transformation occur.
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