Scalable nano-crystallization approach over multiple passivation behavior for Fe-based amorphous coating under chloride exposure

Abstract

Structure-aware complicated Fe-based amorphous coating induced by scalable nano-crystallization approach proved influential in this work. The integration of experimental and mathematical findings uncovered that the dual nanocrystalline phases, interacting within the amorphous matrix of the coating subjected to annealing at 893 K, demonstrated the most superior electrochemical performance against chloride ion attack. At this singularity temperature, compositional intricacies were strengthened by structural relaxation, a consequence of the compatible collaboration of chemical constituents. The categorization of the vacancy-triggered point defects model (VR-PDM) indicated that the involvement and subsequent collapse of oxygen vacancies played a pivotal role in governing the multifaceted passivation behavior. A circulation of film spatial extension evaluated by d′-parameter in assistance with diffusion coefficients D of oxygen vacancies provided the direct evidence that reliable nano-crystallization strategy can reach a critical safety point against corrosion degradation. The total adaptive contribution of passivity to corrosion attack can be beneficial from the precise segmentation of surficial positions superimposed by target metallic atoms in competition with Cl- ions.