Probability analysis of PIT distribution on corroded ballast tank

Publikationstyp
Journal Article
Date Issued
2021-05-15
Sprache
English
Author(s)
Nugroho, Firman A.  
Braun, Moritz  orcid-logo
Ehlers, Sören  
Institut
Konstruktion und Festigkeit von Schiffen M-10  
TORE-URI
http://hdl.handle.net/11420/9278
Journal
Ocean engineering  
Volume
228
Article Number
108958
Citation
Ocean Engineering 228: 108958 (2021-05-15)
Publisher DOI
10.1016/j.oceaneng.2021.108958
Scopus ID
2-s2.0-85103721149
The surface morphology of the ballast tank has changed due to years of exposure to seawater corrosion. Hence, the severity of pitting corrosion and the random shapes of corrosion pits may affect the remaining life of the ballast tank. Therefore, this paper presents the difference in surface morphologies of corroded ballast tank and its correlation to the geometry of corrosion pits. These morphologies are related to the corrosion pit depth, which is obtained with a 3D laser scan. Furthermore, pit depth distributions are analyzed with some statistical parameters at different volumetric changes. As a result, the difference in pitting severity on several volumetric changes is associated with the corrosion pit geometry. The larger volumetric changes, the lower pitting severity, and thus the corrosion pits become a less sharp form or shallower corrosion pits.
Subjects
Pit depth distribution
Pit geometry
Pitting severity
Statistical analysis
Surface morphology