EP0018522A1 - Procédé et appareil pour le maintien de la protection cathodique contre la corrosion - Google Patents

Procédé et appareil pour le maintien de la protection cathodique contre la corrosion Download PDF

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Publication number
EP0018522A1
EP0018522A1 EP80101936A EP80101936A EP0018522A1 EP 0018522 A1 EP0018522 A1 EP 0018522A1 EP 80101936 A EP80101936 A EP 80101936A EP 80101936 A EP80101936 A EP 80101936A EP 0018522 A1 EP0018522 A1 EP 0018522A1
Authority
EP
European Patent Office
Prior art keywords
current
protective
potential
phase
protective current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80101936A
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German (de)
English (en)
Other versions
EP0018522B1 (fr
Inventor
Hans Prof. Dr. Rickert
Günther Dr. Holzäpfel
Milan Saskovic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RWE Energie AG
Original Assignee
Vereinigte Elektrizitatswerke Westfalen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vereinigte Elektrizitatswerke Westfalen AG filed Critical Vereinigte Elektrizitatswerke Westfalen AG
Priority to AT80101936T priority Critical patent/ATE359T1/de
Publication of EP0018522A1 publication Critical patent/EP0018522A1/fr
Application granted granted Critical
Publication of EP0018522B1 publication Critical patent/EP0018522B1/fr
Expired legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04Controlling or regulating desired parameters

Definitions

  • the invention relates to a method and a device for maintaining a cathodic corrosion protection for metallic surfaces in contact with an electrolyte with external current, using an inert electrode as external current anode and a potentiostat.
  • the inventor proposed in a not yet published application to shield the reference electrode, to put it simply, with a kind of Faraday cage, so that a continuous IR-free measurement is possible.
  • the object of the invention is to provide a solution with which a very good measurement of the protective potential on the one hand and on the other hand an optimal regulation of the protective current is possible, a reference electrode susceptible to faults being completely avoided.
  • a reference electrode is completely avoided by the procedure according to the invention. This is possible because the inert electrodes used here have a characteristic potential in this state due to the development of oxygen during the polarization, which occupies the surface, this oxygen occupancy being retained for a certain time after the protective current has been switched off. This potential corresponds to that of an oxygen electrode, so that an exact measurement is possible with Hflf-e of this defined potential. It also follows from this switch-off measurement that the IR-free potential is measured by the immediate disappearance of the disturbing ohmic voltage drop after the switch-off.
  • the interval-like shutdown of the protective current is harmless for the corrosion protection itself, because here the protection potential also remains on the surfaces to be protected by pre-polarization a certain time after the shutdown, since the processes responsible for the corrosion take place comparatively slowly.
  • the invention provides that a control deviation is integrated several times during the protective current shutdown phase and the integrated voltage controls the protective current during the following protective current phase.
  • This configuration makes it possible to set the protective current very precisely and to keep it constant, it being possible, due to a further feature of the invention, which is that the protective current switch-off phase is kept many times smaller than the protective current phase, that the advantages of a practical constant protective current applied to the surface to be protected.
  • the protective current phase is in the range of approximately half a millisecond, which means for the electrochemical processes in question that the protective potential is always maintained.
  • a device for carrying out the method according to the invention is characterized according to the invention by a power supply unit with transformer and rectifier, a voltage sender for setting the protection potential, ei Isolation amplifier and electronic double switch with control element as well as an integrator and a current amplifier, the elements being connected in terms of circuitry to the surface to be protected and an electrode performing the double function as external current anode and reference electrode.
  • This device represents a particularly expedient way of realizing the method according to the invention, but the invention is not restricted to this special device.
  • the surface 1 to be protected is in contact with an electrolyte 2, for example sea water in a ship's hull or household water in a hot water boiler or the like.
  • the surface 1 to be protected is connected to a target voltage generator 3, with which the Protection potential E should be able to be set.
  • the setpoint voltage generator 3 is connected to an isolating amplifier 5, one output 6 of which acts on part 7 of a double switch 8.
  • the other part of the double switch 8 is designated 9.
  • An integrator 10 is located between the two parts 7 and 9 of the double switch 8.
  • the double switch 8 as can be seen from FIG. 1, is actuated by a control element 11, which once comprises a timer and performs the functions "on / off".
  • a current amplifier 12 is connected behind the part 9 of the double switch 8, one output of which is connected via the line 13 to an electrode 14 immersed in the electrolyte 2.
  • the electrode 14 in turn is also connected to the isolation amplifier 5 via a line 15.
  • the system receives the energy necessary for regulating and maintaining the protection potential by means of a power supply unit 16, which is indicated as a hint, the inputs and outputs of which are labeled with the corresponding voltage designations which correspond to those of the inputs and outputs of the protection system.
  • the mode of operation of the device according to the invention is as follows: During the potential interval determined by the control element 11, the switch 8 decouples the transistor 7 serving as a current amplifier and the potential E is compared between the electrode 14, which acts as a reference electrode in this switching state, and the surface 1 to be protected, the surface to be protected lying on ground. Any existing control deviation (E ist - E soll ) is integrated several times by the integrator 10 in the potential interval, in each case in a time period that is still considerably smaller than the potential interval itself. This integrated voltage controls the protective current in the current interval determined by the control element 11 which flows between the electrode 14, which acts as an external current anode in this phase, and the surface 1 to be protected.
  • FIGS. 2 and 3 The results of a test with a device according to the invention are plotted in FIGS. 2 and 3.
  • An electrode made of platinized titanium was used for the experiment, the surface to be protected was that of an iron object. Water with a conductivity of 110 ⁇ S cm -1 was used as the electrolyte.
  • the potential interval during the experiment lasted approx. 40 us.
  • the current interval lasted 400 us.
  • the piece of iron used in the test showed no signs of corrosion even after a long test period.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
EP80101936A 1979-04-26 1980-04-10 Procédé et appareil pour le maintien de la protection cathodique contre la corrosion Expired EP0018522B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101936T ATE359T1 (de) 1979-04-26 1980-04-10 Verfahren und eine vorrichtung zur aufrechterhaltung eines kathodischen korrosionsschutzes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2916934 1979-04-26
DE2916934A DE2916934C2 (de) 1979-04-26 1979-04-26 Verfahren und Vorrichtung zur Aufrechterhaltung eines kathodischen Korrosionsschutzes

Publications (2)

Publication Number Publication Date
EP0018522A1 true EP0018522A1 (fr) 1980-11-12
EP0018522B1 EP0018522B1 (fr) 1981-11-04

Family

ID=6069340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101936A Expired EP0018522B1 (fr) 1979-04-26 1980-04-10 Procédé et appareil pour le maintien de la protection cathodique contre la corrosion

Country Status (3)

Country Link
EP (1) EP0018522B1 (fr)
AT (1) ATE359T1 (fr)
DE (2) DE2916934C2 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145988A (en) * 1981-03-05 1982-09-09 Mitsubishi Electric Corp Anticorrosive electrode device
WO1993004218A1 (fr) 1991-08-14 1993-03-04 Cgr Di Cadignani P.I. Gino Procede et dispositif de maintien d'une protection cathodique contre la corrosion
WO1993011279A1 (fr) * 1991-11-28 1993-06-10 Cyberdan A/S Systeme de distribution du courant electrique pour la protection cathodique active de constructions en beton arme
EP0565192A1 (fr) * 1992-04-07 1993-10-13 Franciscus Brummelhuis Dispositif de protection cathodique
WO2009027402A1 (fr) * 2007-08-31 2009-03-05 BSH Bosch und Siemens Hausgeräte GmbH Procédé de fabrication d'un appareil électroménager conduisant de l'eau
WO2009116901A1 (fr) * 2008-03-19 2009-09-24 Ab Volvo Penta Régulation d'un système de protection contre la corrosion
WO2009116900A1 (fr) * 2008-03-19 2009-09-24 Ab Volvo Penta Régulation d'un système de protection contre la corrosion
CN104674229A (zh) * 2015-03-06 2015-06-03 中国石化管道储运有限公司 地下管线阴极保护的智能化远程监测调控系统
CN105987283A (zh) * 2015-01-28 2016-10-05 上海远动科技有限公司 基于scada系统的天然气管道阴极保护远程监测装置
DE102017200954A1 (de) 2017-01-20 2018-07-26 BSH Hausgeräte GmbH Waschmaschine mit verbesserter Korrosionsstabilität und Verfahren zu deren Betrieb
EP3916128A1 (fr) * 2020-05-27 2021-12-01 iCor Intelligent Corrosion Control GmbH Circuit de protection cathodique contre la corrosion et agencement de mesure lors de la protection cathodique contre la corrosion

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707791C1 (de) * 1987-03-11 1988-03-31 Ver Elek Zitaetswerke Westfale Verfahren und Vorrichtung zur Aufrechterhaltung eines kathodischen Korrosionsschutzes fuer metallische Flaechen mit Fremdstrom
FR2634867B1 (fr) * 1988-07-26 1990-11-09 Advanced Technologies Internal Procede et dispositif de surveillance de la protection cathodique d'une structure metallique enterree ou immergee
DE4107920A1 (de) * 1990-03-15 1991-09-19 Norsk Hydro Magnesium Fluessigkeitsbehaelter, insbesondere warmwasserspeicher
DE4025088A1 (de) * 1990-08-08 1992-02-13 Vaw Ver Aluminium Werke Ag Kathodischer korrosionsschutz fuer ein aluminium enthaltendes substrat
DE4129712C1 (en) * 1991-09-06 1993-05-06 Buderus Heiztechnik Gmbh, 6330 Wetzlar, De Cathodic corrosion protection of enamelled water tank
US7372005B2 (en) 2004-09-27 2008-05-13 Aos Holding Company Water storage device having a powered anode
ES2409938B1 (es) * 2011-12-28 2014-08-22 Fagor, S. Coop. Método y dispositivo de protección catódica anticorrosiva

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150555B (de) * 1958-10-08 1963-06-20 Engelhard Ind Inc Einrichtung fuer den kathodischen Schutz an Schiffen
DE2361547A1 (de) * 1973-12-11 1975-06-19 Karl Heinz Ortmann Kathodischer korrosionsschutz mit einem vom abschaltpotential gesteuertem fremdstromschutzgeraet
CH589727A5 (fr) * 1973-09-06 1977-07-15 Kuenzler Hans
DE2605088B1 (de) * 1976-02-10 1977-07-28 Ver Elek Zitaetswerke Westfale Vorrichtung fuer den kathodischen korrosionsschutz mit fremdstromanode
US4138323A (en) * 1976-09-29 1979-02-06 Statsenko Nikolai N Apparatus for anodic protection against corrosion of metal objects in contact with electrically conductive media

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150555B (de) * 1958-10-08 1963-06-20 Engelhard Ind Inc Einrichtung fuer den kathodischen Schutz an Schiffen
CH589727A5 (fr) * 1973-09-06 1977-07-15 Kuenzler Hans
DE2361547A1 (de) * 1973-12-11 1975-06-19 Karl Heinz Ortmann Kathodischer korrosionsschutz mit einem vom abschaltpotential gesteuertem fremdstromschutzgeraet
DE2605088B1 (de) * 1976-02-10 1977-07-28 Ver Elek Zitaetswerke Westfale Vorrichtung fuer den kathodischen korrosionsschutz mit fremdstromanode
US4138323A (en) * 1976-09-29 1979-02-06 Statsenko Nikolai N Apparatus for anodic protection against corrosion of metal objects in contact with electrically conductive media

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145988A (en) * 1981-03-05 1982-09-09 Mitsubishi Electric Corp Anticorrosive electrode device
WO1993004218A1 (fr) 1991-08-14 1993-03-04 Cgr Di Cadignani P.I. Gino Procede et dispositif de maintien d'une protection cathodique contre la corrosion
WO1993011279A1 (fr) * 1991-11-28 1993-06-10 Cyberdan A/S Systeme de distribution du courant electrique pour la protection cathodique active de constructions en beton arme
AU656639B2 (en) * 1991-11-28 1995-02-09 Cyberdan A/S Electric power distribution system for active cathodic protection of reinforced concrete constructions
EP0565192A1 (fr) * 1992-04-07 1993-10-13 Franciscus Brummelhuis Dispositif de protection cathodique
CN101790339B (zh) * 2007-08-31 2012-03-28 Bsh博世和西门子家用器具有限公司 用于制造带水运行的家用器具的方法
WO2009027402A1 (fr) * 2007-08-31 2009-03-05 BSH Bosch und Siemens Hausgeräte GmbH Procédé de fabrication d'un appareil électroménager conduisant de l'eau
US8783272B2 (en) 2007-08-31 2014-07-22 Bsh Bosch Und Siemens Hausgeraete Gmbh Method for manufacturing a water-bearing domestic appliance
WO2009116901A1 (fr) * 2008-03-19 2009-09-24 Ab Volvo Penta Régulation d'un système de protection contre la corrosion
US8226812B2 (en) 2008-03-19 2012-07-24 Ab Volvo Penta Control of a corrosion protection system
WO2009116900A1 (fr) * 2008-03-19 2009-09-24 Ab Volvo Penta Régulation d'un système de protection contre la corrosion
CN105987283A (zh) * 2015-01-28 2016-10-05 上海远动科技有限公司 基于scada系统的天然气管道阴极保护远程监测装置
CN104674229A (zh) * 2015-03-06 2015-06-03 中国石化管道储运有限公司 地下管线阴极保护的智能化远程监测调控系统
DE102017200954A1 (de) 2017-01-20 2018-07-26 BSH Hausgeräte GmbH Waschmaschine mit verbesserter Korrosionsstabilität und Verfahren zu deren Betrieb
EP3916128A1 (fr) * 2020-05-27 2021-12-01 iCor Intelligent Corrosion Control GmbH Circuit de protection cathodique contre la corrosion et agencement de mesure lors de la protection cathodique contre la corrosion

Also Published As

Publication number Publication date
DE2916934C2 (de) 1981-05-07
EP0018522B1 (fr) 1981-11-04
DE2916934B1 (de) 1980-08-14
DE3060071D1 (en) 1982-01-14
ATE359T1 (de) 1981-11-15

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