<i> <b>Technical Note:</b> </i> Screening of Salt Fog Environments for Mg Alloy Stress Corrosion Cracking Susceptibility
Bibliographic record
Abstract
U-bend samples of Mg alloy AZ31B were subjected to continuous near-neutral salt fog exposure to evaluate the effect of a variable salt content on stress corrosion cracking (SCC) susceptibility. Using the ASTM B117 standard environment as a baseline (5 wt% NaCl (aq) at 35°C), a two order of magnitude reduction in NaCl content coincided with a change in the dominant corrosion mode from localized filament corrosion only to transgranular SCC only. An 11 d exposure period in the 0.05 wt% NaCl (aq) fog was sufficient to cause fracture by transgranular SCC. The resistance of the intact surface film and subsequent cathodically-activated enhanced hydrogen gas evolution likely were the critical factors controlling the transition of the dominant corrosion mode (from filament corrosion to SCC). Filament corrosion initiation likely required a Cl− ion-induced (i.e., chemical) break down of the intact film, whereas SCC likely required a stress-induced rupture (i.e., mechanical) break down of the intact film.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.018 | 0.005 |
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".