Which mechanism reduces hydrogen embrittlement in high-strength steel exposed to acidic environments?

💡 Explanation

When high-strength steel is exposed to acidic environments, hydrogen atoms can diffuse into the steel and accumulate at grain boundaries, reducing cohesion that causes embrittlement; passivation of grain boundaries inhibits hydrogen entry. Therefore, grain boundary passivation reduces embrittlement, rather than phase transformation, protection, or refinement, which affect different material properties.

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