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Which outcome occurs when dissimilar metals with dissolved hydrogen experience fracture?

A)Hydrogen embrittlement reduces boundary cohesion
B)Elevated temperatures induce creep failure
C)Rapid oxidation forms passivation layers
D)Galvanic corrosion protects anodic material

💡 Explanation

Hydrogen embrittlement occurs because hydrogen atoms diffuse into the metal lattice, accumulating at grain boundaries. This reduces the cohesive forces through a mechanism of pressure-induced decohesion, therefore, cracking is easier along those boundaries, rather than uniform deformation.

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