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Which risk increases when high-pressure hydrogen gas encounters embrittled steel?

A)Hydrogen-induced cracking
B)Increased weld strength
C)Formation of iron oxides
D)Improved impact toughness

💡 Explanation

Hydrogen-induced cracking is accelerated when hydrogen atoms diffuse into the steel lattice, causing dislocations and reduced ductility because of stress intensification at crack tips. Therefore the high-pressure exacerbates this embrittlement, rather than improving strength; other factors drive oxidation.

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