Pitting evolution of hyper duplex stainless steel 2707 at nose temperature by electrochemical tests and developed mixed potential model
Source abstract
Abstract
Effect of aging at 900 ℃ on the microstructure and pitting of HDSS 2707 was examined. The pitting resistance of HDSS 2707 decreases over the first 10 h because of the presence of the secondary precipitates, and then increases due to Cr/Mo back diffusion from the matrix into the Cr/Mo-depleted regions. Pitting nucleates around the sigma phase, and propagates within the ferrite, but is blocked by austenite . The developed Mixed Potential Model (MPM) was used to analyze the character of the barrier layer, which is in accordance with the potentiodynamic polarization experiments and morphological observation of pitting.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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