Assessing the Impact of AC, DC, and Hybrid AC/DC Stray Currents on Cathodic Protection Efficiency
Bibliographic record
Abstract
Ensuring the efficiency of cathodic protection (CP) is critical for maintaining the integrity of buried pipelines. Stray currents, particularly those originating from high-voltage power lines, can interfere with CP systems, leading to accelerated corrosion. This study investigates the effects of alternating current (AC), direct current (DC), and hybrid AC/DC stray currents on CP performance. Electrochemical measurements and finite element modeling (FEM) were employed to evaluate the impact of these currents on X70 steel pipelines. Results indicate that AC stray currents reduce CP effectiveness by shifting protection potentials to more electropositive values, increasing corrosion risk. DC stray currents affect CP voltage settings, while hybrid AC/DC interference exacerbates both effects. Findings provide insights into pipeline protection strategies, particularly in environments with mixed AC/DC stray currents.
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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 | 0.001 | 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".