[en] Highlights: • Passive films were separated from glassy substrates as large-area thin membranes. • The highly homogeneous passive films exhibited a single-layer amorphous structure. • Main components of the passive films for the Ti-based MGs were TiO₂, ZrO₂ and BeO. • Alloying Fe and Ni contributed to the enrichment of TiO₂ in the passive film. • Addition of Ni facilitated to improve the structural compactness of passive film. Resolving structural and componential characteristics of passive film is a long-standing challenge in corrosion science since it’s difficult to separate extremely thin passive films. In this work, the passive films are successfully separated from Ti-Zr-Be-Al/Ni/Fe glassy substrates as large-area thin membranes by the designed “Ribbon-Penetration” method. The homogeneous and continuous passive films are identified as a single-layer amorphous structure, whose primary components are TiO₂, ZrO₂ and BeO. Alloying Ni or Fe element could induce the enrichment of TiO₂ in the passive films and improve the structural compactness, resulting in the superior corrosion resistance in 3.5 wt.% NaCl solution.

[en] Highlights: • Influence of quenching and partitioning process on stainless steel was studied. • Pitting potentials of experimental steel partitioned at 350 and 450 °C were higher. • Retained austenite and M_3C carbides existed in matrix of experimental steel. • Retained austenite is beneficial for the corrosion resistance of stainless steel. - Abstract: A 0.3C–13Cr martensitic stainless steel (MSS) was subjected to quenching and partitioning (Q&P) treatment. Due to the different thermodynamic condition from the standard constrained carbon equilibrium (CCE), both the carbides precipitation and the interface migration occur during the partitioning step in the Q&P treatment. However, a sufficient amount of austenite is still retained in the Q&P treated MSS. After being partitioned at 350 °C and 450 °C, the Q&P treated MSS exhibits better corrosion resistance than the same steel treated via conventional quenching and tempering (Q–T) treatment.