The effect of molybdenum on the stability of passive films formed on amorphous Fe-Cr-Mo-P-C alloys by potentiostatic polarization in deaerated 1 M HCl
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Cited by (11)
Fe-based metallic glass composite coatings by HVOF spraying: Influence of Mo on phase evolution, wear and corrosion resistance
2022, Materials CharacterizationCitation Excerpt :It must be pointed out here that the difference in icorr is insignificant compared to one order of magnitude difference in ipass values of P1C and P2C coatings, revealing better passivation ability of P2C. Whereas, the spontaneous passivation in P2C coating can be attributed to the rapid evolution of protective film due to hindered dissolution of Cr during passivation by formation of Mo-oxide film in potential region for active dissolution of Cr, thereby facilitating formation of passive Cr-rich film [58,59]. Moreover, the values of all the corrosion properties in terms of noblest Ecorr, lowest icorr, highest Epit and lowest ipass also substantiate the superior corrosion resistance of P2C.
Effects of Cr and Mo additions on formation and mechanical properties of Arc-sprayed FeBSiNb-based glassy coatings
2018, Journal of Non-Crystalline SolidsCitation Excerpt :The relationship between Cr concentration and corrosion resistance has been well established in Fe-based amorphous metals, where Cr increases the chemical potential for electrochemical corrosion on the one hand, and promotes the formation of a stable and compact passive chromium oxide (or/and oxyhydroxide) film on the other [33]. Moreover, the minor addition of Mo facilitates the formation of the passive chromium oxyhydroxide by the formation of passive tetravalent molybdenum oxide film in the potential regions where Cr actively dissolves [34]. And it suppresses the active dissolution of Cr in these potential ranges.
Laser assisted Fe-based bulk amorphous coating: Thermal effects and corrosion
2014, Journal of Alloys and CompoundsCitation Excerpt :In addition, high concentrations of Mo develop a trivalent Molybdenum oxide and prevent the dissolution of chromium from the chromium oxide passive layer. Thus, greater concentration of Mo results in spontaneous passivation [34,44–46]. Furthermore, it has been reported that carburization of steel improves the corrosion resistance [43] and in the present case, the absence of martensitic phase further confirms the super saturation of solute element (carbon) that is likely to drastically reduce the Ms (martensitic start) temperature and thus avoiding martensitic phase formation.
Anomalous corrosion resistance behavior of Mo-containing SS in alkaline media: The role of microstructure
2011, Materials Chemistry and PhysicsCitation Excerpt :This development is mostly due to economic reasons inasmuch as the role of Mo is still not fully understood. This lack of scientific knowledge concerning the role of Mo can be illustrated by a fundamental disagreement in the literature as to whether Mo is a component of passive films [3,4] or not [5–7]. The consequences of a more widespread use of these alloys are difficult to predict.
An Overview of Thermally Sprayed Fe-Cr-Nb-B Metallic Glass Coatings: From the Alloy Development to the Coating’s Performance Against Corrosion and Wear
2022, Journal of Thermal Spray Technology