A comparison of hydrogen permeation and the resulting corrosion enhancement of X65 and X80 pipeline steels
Bibliographic record
Abstract
In this work, corrosion and electrochemical hydrogen permeation behaviour of two grades of pipeline steel, X65 and X80 steels, were investigated by hydrogen-charging, electrochemical impedance spectroscopy measurements and metallographic observation. It was found that the corrosion and hydrogen permeation behaviour of steels is affected by their metallurgical features. Upon hydrogen-charging, both high grade of X80 pipeline steel and low grade of X65 steel show enhanced corrosion activity. The electrochemical hydrogen permeation current measurements and calculations show that the X80 steel contains a higher density of hydrogen traps than X65 steel, which may potentially result in the increased susceptibility of X80 steel to hydrogen-induced cracking (HIC).Dans ce travail, la corrosion électrochimique de l’hydrogène et un comportement de perméation de deux qualités d’acier de pipeline, X65 et X80 aciers, ont été étudiés par l'hydrogène charge, électrochimiquemesures de spectroscopie d’impédance et l’observation métallographique. On a constaté que lela corrosion et de l’hydrogène comportement de perméation des aciers est affectée par leurs caractéristiques métallurgiques.Sur hydrogène charge, à la fois de haute qualité en acier de pipeline X80 et X65 de bas grade de spectacle en acierune activité améliorée à la corrosion. L'hydrogène perméation électrochimique des mesures de courantet les calculs montrent que l’acier X80 contient une plus grande densité de pièges à hydrogène de X65acier, ce qui peut potentiellement entraîner l’augmentation de la sensibilité de l’acier X80 pour induite par l’hydrogène; Fissuration (HIC).
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How this classification was reachedexpand
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 | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".