Abstract
This study explores the hydrogen permeation resistance of Al-Si-Mg and Al-Si-Mg-Sr coated 22MnB5 boron steel in hot-press-forming. The Al-Si-Mg coating exhibits structural changes and Mg segregation, replacing the oxide layer. Sr addition is found segregated at the surface, further transforming the oxide layer. These modifications improve hydrogen permeation resistance, reducing both reversible and irreversible hydrogen permeation during hot-press-forming. Mg or Sr addition presents promising avenues for enhancing hydrogen permeation resistance in steel, potentially extending the service life of ultra-high-strength steel.
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