Quality Assurance Activities for Corrosion Resistant Membranes in Pressure Vessels
Bibliographic record
Abstract
The operating conditions of several process vessels in the hydrometallurgical sector are so severe that engineers employ carbon steel with corrosion-resistant cladding such as titanium, zirconium and tantalum; high nickel alloy weld overlay; or the use of corrosion resistant membranes. Corrosion resistant membranes may be constructed of halogenated synthetic rubbers, vinyl ester resins, fluoropolymers, bituminous mastic, or homogeneously bonded lead. The quality and integrity of such membranes is of the utmost importance to the safe operation and 20+ years of service life for such vessels. The authors have employed a number of the above noted membranes in acid leach reactors, oxidation autoclaves, hydrogen sulfide (H2S) precipitation reactors, pressure letdown vessels, and off-gas cyclones. This paper presents an outline of the quality control activities undertaken by the authors for several recently completed and on-going hydrometallurgical projects, including prequalification, validation testing, material verification, contamination control, discontinuity (holiday) testing, non-destructive examination and assisted/enhanced visual inspection.
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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 | 0.000 |
| 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".