Phosphorous Alloying and Annealing Effects on the Corrosion Properties of Nanocrystalline Co-P Alloys in Acidic Solution
Bibliographic record
Abstract
The corrosion properties of nanocrystalline Co-1.1 and 2.1 wt% P alloys and their annealed alloys as well as nanocrystalline Co were studied in a deaerated 0.1 M sulfuric acid (H2SO4) solution using electrochemical measurements and x-ray photoelectron spectroscopy (XPS) surface analysis. Potentiodynamic polarization testing and impedance measurements revealed that an addition of bulk P content to nanocrystalline Co enhanced the corrosion resistance; however, this enhancement was compromised by the annealing process at 350°C and 800°C. The enhanced corrosion resistance of nanocrystalline Co-P alloys at open-circuit potential was due to the increase of elemental P concentration on the surface that acted to hinder the anodic dissolution kinetics of surface Co following an initial selective dissolution of Co. However, the superior corrosion resistance of Co-P alloys did not last at the high anodic potential region, because of the formation of a nonprotective surface film consisting of mainly hypophosphite and phosphate as well as elemental P showing a pitting corrosion.
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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".