Effects of O<sub>2</sub> and SO<sub>2</sub> on Water Chemistry Characteristics and Corrosion Behavior of X70 Pipeline Steel in Supercritical CO<sub>2</sub> Transport System
Why this work is in the frame
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Bibliographic record
Abstract
The water chemistry characteristics of supercritical CO 2 streams and the corrosion behavior of X70 steel in a supercritical CO 2 system containing O 2 and/or SO 2 impurities were investigated by thermodynamic simulation and corrosion testing. The results show that O 2 concentration in supercritical CO 2 streams contributes to the negligible influence on the water chemistry characteristics, corresponding to a slight change in the corrosion rate, whereas the rising SO 2 concentration noticeably deteriorates the water chemistry characteristics, in accordance with a remarkable increase in the corrosion rate. The coexistence of O 2 and SO 2 synergistically accelerates the corrosion of X70 steel due to the fact that the formation of H 2 SO 4 makes the condensed water highly acidified. The corrosion products were further characterized by surface analysis techniques. It is found that O 2 and/or SO 2 remarkably affects the corrosion film characteristics by changing the chemistry characteristics of condensed water. The corrosion model corresponding to this phenomenon was proposed.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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 it