The Effect of Temperature on Dealloying Mechanisms in Molten Salt Corrosion
Bibliographic record
Abstract
The mechanism of molten salt corrosion of Ni− and Fe-based model alloys is studied at different homologous temperatures relevant to molten salt nuclear reactor application. Dealloying of Fe and Cr occurs in molten chloride salts in the range of 350 °C–700 °C and the dealloying parting limit depends on temperature. At 350 °C, molten salt dealloying is similar to aqueous systems; surface diffusion of elemental Ni at the solid/electrolyte interface is the governing transport mechanism, and the microporous ligaments have an isotropic morphology. The high surface mobility of Ni blurs the ordinary parting limit concept, but such a limit is still present. Above 500 °C, grain boundary dealloying is prevalent; the governing mechanism is interface-controlled, but a transitional morphology evolves, signaling a role of lattice diffusion. When the temperature exceeds 600 °C, the crystal orientation of dealloyed substrates is no longer that of their parent grain, and the fairly isotropic nature of dealloying shifts to a more one-dimensional corrosion ahead of the dealloying front that indicates some kind of hybrid mechanism. At 700 °C, the dealloying threshold approaches below 22 at%, accompanied by rapid coarsening and densification of the dealloyed material due to strong influence of lattice diffusion of alloying elements.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".