Demonstrates enhanced corrosion resistance in nanostructured alloys, suggesting effective surface engineering approaches.
A nanostructured crystalline-amorphous Fe45Cr10Co10Mn35 compositionally complex alloy (CCA) was fabricated via laser surface remelting (LSR) technique. Featuring nanograins (NGs) embedded in Cr-segregated amorphous boundaries, it shows a corrosion current density of 1.42 µA/cm² (3.5 wt.% NaCl), ∼4.3 times lower than the coarse-grained counterpart. Enhanced corrosion resistance arises from synergistic effect of NGs and Cr-enriched amorphous boundaries, which facilitates the formation of more compact passive films. Density functional theory (DFT) calculations confirm that Cr segregation suppresses nano-galvanic coupling by adjusting the work function. The study demonstrates a promising strategy for enhancing corrosion resistance in CCAs through interface engineering.
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Gao et al. (2026) studied this question.
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