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Optimizing the cathodic protection system of pipeline under simulating thermocline environment in deep water by finite element method
Author(s) -
Li C. J.,
Du M.
Publication year - 2017
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201609350
Subject(s) - cathodic protection , thermocline , anode , finite element method , pipeline (software) , galvanic anode , marine engineering , mechanics , materials science , computer science , structural engineering , chemistry , engineering , mechanical engineering , geology , physics , oceanography , electrode
A physical model has been established previously to simulate the cathodic protection (CP) system of pipeline passing through the thermocline environment in deep water and the cathodic potential distribution was numerically calculated by finite element method (FEM), which has been verified by laboratory results. In order to extend the application of the numerical model to CP design and optimization, new various situations of anode placement, such as different number and positions, were simulated by the same model. The potential distributions on the pipeline surface and also in the whole domain of the physical model were predicted to evaluate the sacrificial anode throwing power in the heterogeneous environment. The optimum anode positions were determined for different anode number. The results showed that the anode number and also the positions had a significant influence on the potential distributions.