Add time:07/15/2019         Source:sciencedirect.com

Passive films on duplex stainless steels are heterogeneous, with properties depending on the two-phase microstructure. Accordingly, the interaction of chloride ions with the passive films on either of the two phases ought to vary. These issues have been investigated by some indirect methods, not sufficiently nor directly corroborated by experimental evidence. Using aberration-corrected transmission electron microscopy, we simultaneously investigate the films on the ferrite and austenite phase near the phase boundary, as well as the film evolution in chloride-containing media. This study provides some virtual experimental insights into the features of chloride attack on the passive film of duplex alloys.

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