Development and evaluation of modified ZnCr-Shell particulates composite coatings: corrosion, structural, and microhardness properties
Bibliographic record
Abstract
Corrosion-induced surface degradation in ship hulls necessitates advanced protective solutions. This study develops sustainable composite coatings by electrodepositing coconut shell particles (CSP) into Zn-CrO 3 matrices. This work introduces the novel use of coconut shell waste as a synergistic reinforcement to enhance both the anti-corrosion and mechanical properties of Zn-CrO 3 coatings. Coatings with increasing CSP content (0-6 g/L) were evaluated, demonstrating exceptional performance: Zn-20CrO 3 -6CSP achieved 93.325 Ω polarization resistance (297% higher than uncoated steel), reduced corrosion rate by 75% to 2.285 mm/year, and increased hardness by 90% to 259.3 Kgf/mm 2 . Microstructural analysis revealed a novel, transformative evolution from porous scale-like formations to compact knot-like structures that physically impede chloride penetration. These enhancements derive from the novel finding of CSP's dual functionality as both a pore-blocking barrier and grain-refining agent. The findings establish CSP as an effective eco-friendly reinforcement for marine coatings, offering superior corrosion protection and mechanical durability through sustainable waste valorization.
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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".