Which mechanism enables hydrogen embrittlement to reduce structural integrity in pipelines?

💡 Explanation

When hydrogen permeates a metal pipeline, hydrogen atoms diffuse to grain boundaries under stress, assisting in cleavage and facilitating crack propagation because of reduced bond strength. Therefore grain boundary induced crack propagation is the outcome, rather than options requiring strengthening or blockage mechanisms.

• Which outcome occurs when combustion timing drifts in a lean-burn gasoline engine?
• Which outcome occurs when hydrogen gas permeates through a metal at elevated temperatures?
• Which risk increases when a long-distance fiber optic cable experiences stress-induced birefringence?
• Which outcome results when accelerated tritium undergoes beta decay?
• Which consequence results when extreme spacetime curvature collapses a stellar remnant?
• Which outcome occurs when imperfections induce phase shifts?