(19)
(11) EP 2 610 369 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.11.2016 Bulletin 2016/47

(43) Date of publication A2:
03.07.2013 Bulletin 2013/27

(21) Application number: 12382489.8

(22) Date of filing: 10.12.2012
(51) International Patent Classification (IPC): 
C23F 13/04(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.12.2011 ES 201132117

(71) Applicant: Fagor, S. Coop.
20500 Arrasate-Mondragon (ES)

(72) Inventors:
  • Kholky, Mounir
    48006 BILBAO (ES)
  • Nazabal Muñagorri, Luis Mª
    20493 ELDUAIN (ES)

(74) Representative: Igartua, Ismael 
Galbaian S.Coop. Polo de Innovación Garaia Goiru Kalea 1 - P.O. Box 213
20500 Arrasate-Mondragón
20500 Arrasate-Mondragón (ES)

   


(54) Method and device for anti-corrosion cathodic protection


(57) The present invention relates to a method and device for impressed current anticorrosion cathodic protection for metal surfaces in contact with an electrolyte, in which the following is used: an inert anode, wherein a protection current is connected and disconnected in successive periods Pa and Pd, each period Pd comprising a standby phase Ps, and a measurement and regulation phase Pmr in which a potential difference ΔV between the potential Vo in the inert anode and the metal surface is measured, and a potential Vminref is measured, wherein in phase Pmr the time ΔT elapsing between an instant to in which the potential Vo is measured and an instant t in which the Vminref is reached is measured, and the magnitude of the protection current and an activation time Ta of the next period Pa is established depending on ΔV and ΔT.







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