Abstract
In the present work, an impressed current cathodic protection (ICCP) system for the protection against corrosion of a 399-m-length container ship throughout its service life is designed. The study is carried out with the aid of a boundary element method code, accelerated by an adaptive cross approximation scheme, utilizing a detailed large-scale model. The exact geometry of the ship, the progressive damage of the coating system, and the dynamic state during the cruise of the ship are the main parameters taken into consideration in modelling. The main objective of the design process is to minimize the electric power, delivered by the ICCP system, determining the optimal number and location of the installed inert anodes to accomplish the absolute minimum protection potential on the immersed steel surfaces of the ship and, simultaneously, avoid overprotection. Performing an extensive parametric study, a six-zone ICCP system is proposed, consisting of 10 anodes at the hull and four identical anodes at each of four thrusters.
Highlights
The steel structure of a ship that is exposed to seawater is naturally prone to corrode
In modern impressed current cathodic protection (ICCP) systems, the delivered current is regulated in varying conditions with the aid of automated control systems
The design of an ICCP system is dependent on the polarization characteristics of the exposed metals and alloys, the chemical and electrical properties of seawater, the geometry of the immersed surfaces, and the service life and the operational aspects of the ship
Summary
The steel structure of a ship that is exposed to seawater is naturally prone to corrode. The design of an ICCP system is dependent on the polarization characteristics of the exposed metals and alloys, the chemical and electrical properties of seawater, the geometry of the immersed surfaces, and the service life and the operational aspects of the ship. The design of an efficient ICCP system demands accurate modelling of the exact. The design of an efficient ICCP system demands accurate modelling of the exact geometry geometry of of complex complex metallic metallic structures. ACA/BEM code, code, In this work, an ICCP system of aa container ship is proposed model. The problem is modelled, taking into consideration the exact geometry of the ship, the progressive. The problem is modelled, taking into consideration the exact geometry of the ship, the progressive damage various regions. Governing Equations of an ICCP Problem for Immersed Structures in Semi-Infinite
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