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← ScienceWhich risk increases when a high-pressure hydrogen storage tank develops microcracks?
A)Embrittlement mediated by grain boundary diffusion✓
B)Polymerization of hydrogen into heavier elements
C)Superconductivity diminishing resistance unexpectedly
D)Radiative heat transfer increasing suddenly
💡 Explanation
The risk of hydrogen embrittlement increases because microcracks allow hydrogen atoms to diffuse into the metal's grain boundaries, decreasing its ductility; therefore, the material can fracture at lower stress rather than showing ductile behavior.
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