Hydrogen Permeability of Ion Vapor Deposited (IVD) and Electroplated Al Coatings by Electrochemical Permeation Cell Technique
Bibliographic record
Abstract
Abstract Ion vapor deposited (IVD) and electroplated Al coatings are potential replacements for electroplated low hydrogen embrittlement (LHE) Cd coatings on high strength steel substrates due to their sacrificial protection. As compared to LHE Cd coating, which needs a post baking process to remove hydrogen, both IVD and electroplated Al coatings do not introduce any hydrogen during plating process. But in corroding environments, it is possible that evolved hydrogen may diffuse through the coating into substrate and cause hydrogen damage. In this work the electrochemical permeation cell technique is used to study the effective diffusivity of hydrogen for IVD and electroplated Al coating using an LHE Cd coating as a base line. The effective diffusivities obtained from galvanostatic charging were modelled using the classical diffusion equation to obtain hydrogen permeation flux. The effective diffusivities of hydrogen in Al coated steel are further utilized to understand hydrogen embrittlement susceptibility by mechanical property measurements on Al coated, aerospace high strength steels and components.
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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 | 0.000 |
| 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) | 0.001 | 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".