Investigation of the ordered and disordered corrosion morphologies on Ni-based alloy in the passive state
Source abstract
Abstract
We report an order and disorder combined corrosion morphology of dual-phase Ni-based alloy in the passive state. After galvanostatic polarization in the passive region, the surface of the γ(Ni) phase presents amorphous feature while that of the γ′(Ni 3Al) phase maintains crystalline. The variations in weight percentages of Ni (50.19% → 3.80%), Co (19.24% → 0.65%), Ta (0.85% → 21.19%), and W (5.73% → 43.79%) of γ surface are evident, whereas the composition of γ′ surface is nearly unchanged. The passive film comprises W ox 6 + , Ta ox 5 + , Cr ox 3 + , Co ox 8 / 3 + , Ni hy 2 + , and Co hy 2 + , and it shows stronger protection effect on the γ phase.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Corrosion Behavior and Inhibition · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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