Eur. Phys. J. Appl. Phys.
Volume 52, Number 2, November 2010
Focus on Numelec
|Number of page(s)||11|
|Published online||21 October 2010|
Ships hull corrosion diagnosis from close measurements of electric potential in the water
G2Elab (UMR 5269 INPG-UJF-CNRS), ENSIEG, BP 46, 38000 Grenoble, France
2 DGA/GESMA, Département DDBF BP 42, 29240 Brest Armées, France
3 LEPMI (UMR 5269 INPG-UJF-CNRS), 1130 rue de la Piscine, 38000 Grenoble, France
Corresponding author: firstname.lastname@example.org
Accepted: 22 July 2010
Published online: 21 October 2010
We present here an original application linking an electrochemical domain and the computational aspect of electromagnetic fields to make a corrosion diagnosis of a protected underwater steel structure. After a defined operating time, it is mandatory to check an underwater steel structure. This control may happen too early, if the protection has not been damaged; but it may happen too late, if some particularly bad environmental conditions have already damaged the structure. Moreover, current examination techniques require immobilizing the structure for a long time: they may be complicated to dry (pipe lines or tanks) or to place in dry docks for vessels. The efficiency of these techniques could be improved. The purpose of this paper is to replace this checking/examination by a series of close electrical measurements in the electrolyte which provides a corrosion diagnosis of the structure. This also allows computing the electric and magnetic fields caused by this phenomenon everywhere in the electrolyte. The new method introduced ensures a great time-saving but also an accuracy never reached before.
© EDP Sciences, 2010
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