The Role of Electrolyte Hydrodynamic Properties on the Performance of Lead-Based Anodes in Electrometallurgical Processes
Bibliographic record
Abstract
Integrity of lead anodes has always been a major concern for the electrowinning industry. This work investigates the effect of solution hydrodynamics on the degradation of Pb-Sn-Ca and Pb-Ca anodes. Galvanostatic experiments (50 mA/cm2) were performed at 37 ± 0.5°C using 0, 600, and 1000 rpm stirring rates for the durations of 24 and 72 hours. The PbO2 layer was reduced to PbSO4 (discharged) and the discharge duration was used in corrosion rate calculations. Weight loss measurements along with the discharge calculations revealed that the degradation rate of lead anodes increased with the solution stirring rate. In addition, the amount of PbO2 remaining on the surfaces was decreased as a function of solution velocity. Therefore, it was concluded that detachment of the corrosion products from the surface (flaking) affects the degradation rate of lead anodes significantly. Moreover, it was determined that the Pb-Sn-Ca anode performed better than the Pb-Ca anode in terms of both integrity and electrocatalytic properties for oxygen evolution reaction (OER). Surface morphologies of the Pb-Sn-Ca anodes indicated that the roughness decreased as the solution stirring rate increased.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".