Pit Propagation in Pure Aluminum Investigated via the 1D Artificial Pit Technique: Growth Regimes, Surface Morphology and Implications for Stability Criteria
Why this work is in the frame
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Bibliographic record
Abstract
The growth kinetics of various diameter 1D aluminum artificial pits were investigated under potential control in 1 mol dm-3 HCl. Pits of diameter ≥ 50 μm display mass transport control at high potentials, Ohmic growth at intermediate values with a transition to a further region of potential-independent dissolution at ca. 100 mV prior to repassivation. Optical and x-ray computed tomography observations of pit cross-sections suggest Ohmic propagation is associated with non-uniform dissolution over the pit surface. By contrast narrow diameter pits (25 μm) show no evidence of dissolution below their limiting current density and appear to grow without surface roughening until 10 - 20 mV before repassivation. Investigation of the nature of pit growth prior to this point via potential perturbation techniques confirmed that dissolution occurs under mass transport control. These observations support the hypothesis that sustained pit propagation requires a high degree of saturation, close to 100%, in AlCl3.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| 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 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it