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research-article

SPATIAL CORROSION WASTAGE MODELLING OF STEEL PLATES EXPOSED TO MARINE ENVIRONMENTS

[+] Author and Article Information
Yordan Garbatov

Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
yordan.garbatov@centec.tecnico.ulisboa.pt

Carlos Guedes Soares

Fellow ASME, Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
c.guedes.soare@centec.tecnico.ulisboa.pt

1Corresponding author.

ASME doi:10.1115/1.4041991 History: Received February 10, 2018; Revised July 18, 2018

Abstract

The objective of the present study is to identify the most suitable corrosion degradation model, fitted with real corrosion depth measurement data sets and to reproduce the corroded steel plate surface as a function of time and spatial distribution using advanced statistical methods. An approach for adequately identifying the best-fitted model to real corrosion depth measurement data sets is employed. Two distinct statistical methods for generating a statistical representation of a corroded plate surface in the case of significant and insignificant correlation of the corrosion degradation are provided. A sequence dependent data analysis is performed based on the fast Fourier transform, which is used as an input for a random field modelling of corroded steel plate surfaces. The output of this study represents very important information about the corroded plate surface topology that can be used in any advanced finite element analyses of structural integrity assessment. The formulations can be adapted to any structural components and corrosion environments.

Copyright (c) 2018 by ASME
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