Comprehensive Failure Analysis of LNG Carrier Marine Condenser Vent Pipe Lines: Mechanisms of Internal Corrosion and Biofouling-Driven Degradation
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2025
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| _version_ | 1866902008669143040 |
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| author | Dr.Vijesh Vijayan |
| author_facet | Dr.Vijesh Vijayan |
| contents | <p>This paper presents a detailed failure analysis of a marine condenser vent pipe from an LNG carrier,<br>which suffered severe internal degradation over three years of service. The investigation attributes<br>failures predominantly to microbiologically influenced corrosion (MIC) and extensive biofouling,<br>notably from acorn barnacle (Cirripedia) colonization. The ingress of marine organisms was due to<br>ineffective seawater fine mesh straining, resulting in persistent biofilm formation, localized corrosion<br>cells, and anaerobic niches conducive to aggressive under-deposit attack. Degradation mechanisms<br>included crevice corrosion, oxygen-concentration-cell activity, and MIC exacerbated by intermittent or<br>stagnant flow. The study involved visual inspection, ultrasonic wall thickness mapping, corrosion<br>morphology characterization, and metallurgical assessment. Up to 85% wall thinning was recorded<br>beneath biofilm-laden zones. Comparisons are drawn to similar failures in boiler systems. The study<br>concludes with practical engineering recommendations upgrading lift materials, applying internal<br>coatings, enhancing filtration, and introducing biocide dosing to mitigate future failures in comparable<br>marine condenser systems.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15792473 |
| institution | Zenodo |
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| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Comprehensive Failure Analysis of LNG Carrier Marine Condenser Vent Pipe Lines: Mechanisms of Internal Corrosion and Biofouling-Driven Degradation Dr.Vijesh Vijayan <p>This paper presents a detailed failure analysis of a marine condenser vent pipe from an LNG carrier,<br>which suffered severe internal degradation over three years of service. The investigation attributes<br>failures predominantly to microbiologically influenced corrosion (MIC) and extensive biofouling,<br>notably from acorn barnacle (Cirripedia) colonization. The ingress of marine organisms was due to<br>ineffective seawater fine mesh straining, resulting in persistent biofilm formation, localized corrosion<br>cells, and anaerobic niches conducive to aggressive under-deposit attack. Degradation mechanisms<br>included crevice corrosion, oxygen-concentration-cell activity, and MIC exacerbated by intermittent or<br>stagnant flow. The study involved visual inspection, ultrasonic wall thickness mapping, corrosion<br>morphology characterization, and metallurgical assessment. Up to 85% wall thinning was recorded<br>beneath biofilm-laden zones. Comparisons are drawn to similar failures in boiler systems. The study<br>concludes with practical engineering recommendations upgrading lift materials, applying internal<br>coatings, enhancing filtration, and introducing biocide dosing to mitigate future failures in comparable<br>marine condenser systems.</p> |
| title | Comprehensive Failure Analysis of LNG Carrier Marine Condenser Vent Pipe Lines: Mechanisms of Internal Corrosion and Biofouling-Driven Degradation |
| url | https://doi.org/10.5281/zenodo.15792473 |