An Approach to the Probabilistic Corrosion Rate Estimation Model for Inner Bottom Plates of Bulk Carriers

Ivošević, Špiro; Meštrović, Romeo; Kovač, Nataša

doi:10.21278/brod68404

Cited by 11 publications

(6 citation statements)

References 12 publications

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“…In other words, the first (Q1) and the third quartile (Q3) were determined, respectively. As indicated, the original thickness values of metal plates were grouped into intervals [11,13), [13,15), [15,18]. The intervals are labelled by ordinal numbers i ∈ {1, 2, 3} respectively.…”

Section: Resultsmentioning

confidence: 99%

“…A total of 20 ageing bulk carriers aged between 5 and 25 years were measured one, two, or three times during special surveys. Based on the previous research by the same authors, the collected data were systematized and presented in Table 3 [15,[21][22][23]. Based on the data collecting methodology, it is assumed that each longitudinal girder in each tank was observed in upper and lower girder zones at five identical positions (at two ends of a tank and at three positions that were equally distanced from tank ends).…”

Section: A Brief Description Of the Input Databasementioning

confidence: 99%

“…The deterioration of ship structures and their accelerated ageing is a monotonous process that depends on the length of exploitation, the complexity of operating conditions, understanding of corrosion mechanisms, etc. The dominant influences are certainly the atmosphere, sea, and operating conditions on a ship [15].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Corrosion Depth of Double Bottom Longitudinal Girder on Aging Bulk Carriers

Ivošević

Kovač

Momčilović

et al. 2022

JMSE

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The longitudinal girder (LG) between fuel oil tanks (FOT) and water ballast tanks in the double bottoms of ships represent critical structural parts whose watertight nature could be harmed by corrosion, thus, causing the pollution of water ballast tanks and adjacent areas. The new common structural rules (CSR) define the minimum thickness values of structural elements and corrosion margins. The assessment of the deviations from the prescribed values during ship operation could optimize the prescribed criteria. Assuming that corrosive processes begin after four years of operation, the paper analyzes a linear model that describes the percentage of plate wear as a function of the built-in thickness of LG of FOT. The research included 20 ships and provided the database for 1918 corrosion depth values. The gauging records included the average values of the original thickness of steel plates grouped in three intervals (11–13 mm, 13–15 mm, 15–18 mm). Based on the difference between the built-in and subsequently measured values, the paper analyzes the percentage of thickness reduction due to corrosion, concerning the original plate thickness. The findings of the research should facilitate the optimization of corrosion margins and prevent potential structural collapse and pollution.

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Section: Resultsmentioning

confidence: 99%

Section: A Brief Description Of the Input Databasementioning

confidence: 99%

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Evaluation of the Corrosion Depth of Double Bottom Longitudinal Girder on Aging Bulk Carriers

Ivošević

Kovač

Momčilović

et al. 2022

JMSE

Self Cite

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“…The most relevant research so far focused on the analysis of corrosion depth and rate (Paik et al, 2004;Garbatov and Soares, 2010;Wang et al, 2021;Soares and Garbatov, 1998). The rules of classification societies precisely define the allowable corrosion depth in millimeters, although some of the studies gave preference to the percentage of thickness reduction compared to the original thickness of installed steel plates (Ivošević et al, 2019;Ivošević et al, 2017;Ivošević et al, 2020.a).…”

Section: Figurementioning

confidence: 99%

“…Severe damage can cause the total loss of ships or environmental pollution. Given that pollution caused by fuel leakage through ship plating (Figure 1) is manageable compared to more extensive damage resulting in excessive pollution, research on fuel tanks is of utmost importance (Ivošević et al, 2017;Ivošević et al, 2019;Ivošević et al, 2020.a).…”

Section: Introductionmentioning

confidence: 99%

Analyses of the Failures of Hull Structure Plating Caused by Corrosion

Ivošević,

Kovač

2023

Trans. Marit. Sci.

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There are a lot of different factors of hull structure degradation such as cracks, damage, fatigue or corrosion. Fatigue and corrosion were the most thoroughly examined in the previous studies. Corrosion is a more dominant form of degradation that causes the reduction of the original thickness of materials over time, which can be expressed through weight loss, in millimeter or percentage of thickness diminution of steel plates. Corrosion process can reduce carrying capacity and longitudinal strength of vessels, cause different types of failures or lead to the pollution of surrounding areas. This study analyzes the corrosion of a structural element of a fuel tank on the old bulk carrier that has been in operation for 25 years. The database consists of thickness measures expressed as percentage of diminution of the original plate thickness and the analysis of the chemical composition of a corroded and replaced steel plate. The study examined the total of 350 measured data after 5, 10, 15, 20 and 25 years of ship exploitation. Similarly, the research observed the chemical composition of the replaced steel plate. Linear corrosion models were developed while the chemical composition was analyzed by means of Energy Dispersive X-ray analysis of the samples from both sides of the corroded plate. The obtained results indicated that the degree of corrosion significantly varies depending on the environment of the plate. Furthermore, the formed linear corrosion model adequately follows the empirical data and value of 1,55 %/year.

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Probabilistic Modelling of Corrosive Wear in Bulkhead Panels for Bulk Carriers

Kovač,

Ivošević

2025

Mechanisms and Machine Science

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An Approach to the Probabilistic Corrosion Rate Estimation Model for Inner Bottom Plates of Bulk Carriers

Cited by 11 publications

References 12 publications

Evaluation of the Corrosion Depth of Double Bottom Longitudinal Girder on Aging Bulk Carriers

Evaluation of the Corrosion Depth of Double Bottom Longitudinal Girder on Aging Bulk Carriers

Analyses of the Failures of Hull Structure Plating Caused by Corrosion

Probabilistic Modelling of Corrosive Wear in Bulkhead Panels for Bulk Carriers

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