Fig. 4: Characterization of S32205 DSSs before and after immersion corrosion. | Nature Communications

Fig. 4: Characterization of S32205 DSSs before and after immersion corrosion.

From: Design for improving corrosion resistance of duplex stainless steels by wrapping inclusions with niobium armour

Fig. 4

SEM morphologies (left) and AFM topographies (right) before (a, c) and after (b, d) immersion corrosion in a 6% FeCl3 solution at 50 °C for b 12 h and d 10 d. a, b MgAl2O4-MnS inclusion in 0 Nb steel and c, d MgAl2O4-MnS@Z core-shell structure in 0.25 Nb steel. e SEM morphology and f SKPFM map of MgAl2O4-MnS@Z core-shell structure before immersion corrosion. g Volta potential variation along the MgAl2O4-MnS@Z core-shell structure as marked by the arrowed line in (f). MA in (g) is the abbreviation for the MgAl2O4 inclusion. Source data are provided as a Source Data file.

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