Effect of oxygen on near-neutral pH stress corrosion crack initiation under a simulated tape coating disbondment
Bibliographic record
Abstract
A test setup that enables investigating the synergistic effects of tape coating disbondment, cathodic protection (CP) and low-frequency cyclic loading is used to determine the effect of oxygen on near-neutral pH stress corrosion crack initiation. After low-frequency corrosion fatigue tests, results show that surface micro-cracks initiate under the simulated tape coating disbondments at regions with insufficient CP potentials, not more remote locations completely free from CP as commonly believed. The presence of 1% oxygen in the composition of the purging gas has binary effects on the crack initiation under the simulated tape coating disbondment. On one hand it increases the size of the surface micro-cracks initiated on the steel surface at locations with some but insufficient CP potentials; and on the other, it reduces the number of surface micro-cracks at regions with no CP because of an extension of the general corrosion region deep inside the simulated coating disbondment.
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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 | 0.000 |
| 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".