Probability analysis of PIT distribution on corroded ballast tank

Firman A. Nugroho, Moritz Braun, Sören Ehlers

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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.

Original languageEnglish
Article number108958
JournalOcean Engineering
Publication statusPublished - 15 May 2021


  • Pit depth distribution
  • Pit geometry
  • Pitting severity
  • Statistical analysis
  • Surface morphology


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