EP3347507B1 - Procédé de pose d'un système anodique destiné à une protection anticorrosion cathodique - Google Patents

Procédé de pose d'un système anodique destiné à une protection anticorrosion cathodique Download PDF

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Publication number
EP3347507B1
EP3347507B1 EP16769903.2A EP16769903A EP3347507B1 EP 3347507 B1 EP3347507 B1 EP 3347507B1 EP 16769903 A EP16769903 A EP 16769903A EP 3347507 B1 EP3347507 B1 EP 3347507B1
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EP
European Patent Office
Prior art keywords
anode
laying
primary
carbon fibre
carbon fiber
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Application number
EP16769903.2A
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German (de)
English (en)
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EP3347507A1 (fr
Inventor
Detlef Koch
Majid Mahjoori
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KOCH, DETLEF
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Individual
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23F—NON-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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23F—NON-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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23F—NON-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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/16—Electrodes characterised by the combination of the structure and the material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23F—NON-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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20—Conducting electric current to electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23F—NON-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
    • C23F2201/00—Type of materials to be protected by cathodic protection
    • C23F2201/02—Concrete, e.g. reinforced

Definitions

  • the invention relates to a method for laying an anode system for a cathodic protection against corrosion and the use of a non-metallic tape anode in a two-dimensional anode system for cathodic corrosion protection.
  • Reinforced concrete structures are an integral part of the infrastructure in almost every country in the world.
  • many busy structures made of reinforced concrete are built, e.g. Parking garages, garages, highways, bridges, tunnels etc.
  • a large number of these structures will be used for 50 to 100 years (and sometimes even longer).
  • de-icing salts are usually chloride-containing. Therefore, in combination with water, solutions are created which cause corrosion in the structures. For many structures, therefore, substantial, cost-intensive repair work on the reinforcement must be carried out after only 20-25 years.
  • the contaminated overlay concrete is usually removed, the reinforcing steel cleaned and provided with a new corrosion protection (eg on a polymer or cement basis).
  • a new corrosion protection eg on a polymer or cement basis.
  • the repaired area often lasts only a few years (due to mechanical, thermal, and / or hygric incompatibilities), requiring prompt further repair, even when the cover concrete is heavily stressed. This causes high costs, represents a significant intervention in the structure and not least leads to usage restrictions during the repair
  • PPS cathodic corrosion protection
  • cathodic corrosion protection is becoming increasingly important as an economic repair method for components that are at risk of corrosion or damage.
  • the principle of electrochemical protection is to electrically influence the corrosion process of unalloyed or low alloy steels (e.g., reinforcing steel) in an expanded electrolyte (soils, seawater, when used in reinforced concrete: concrete) by introducing direct current.
  • This direct current causes a shift of the electrochemical potential of the metal to be protected in the negative direction, whereby the metal surface is cathodically polarized and damaging corrosion is prevented.
  • a permanent and corrosion-resistant anode To impress a protective current, a permanent and corrosion-resistant anode must first be coupled to the concrete and attached to the positive pole of a rectifier serving as a voltage source.
  • the negative pole of the DC voltage is connected to the steel to be protected (with reinforced concrete to the reinforcement). After switching on the DC voltage to be protected steel is cathodically polarized and the steel corrosion largely prevented.
  • the condition of the building, the structure or the pipeline or the corrosion of the steel can be monitored remotely.
  • the anode system as large as possible in the vicinity of serving as a cathode steel element, for example, the reinforcing steel, is designed.
  • a cathode steel element for example, the reinforcing steel
  • this is hardly feasible with the anode systems used hitherto, for example when using rod anodes or titanium tape anodes, or it is very difficult to install, as for example when using a reticulated titanium anode.
  • the application of a reticulated titanium anode for the protection of a reinforced concrete structure on the concrete is due to the inflexibility of the material particularly laborious and time consuming.
  • PPS systems are for example from the publications WO 92/11399 A1 . WO 99/19540 A1 . EP 1 318 247 A1 and US 2014/251793 A1 known.
  • the invention is therefore based on the object of specifying a method for laying an anode system for cathodic corrosion protection, which can be carried out in a particularly simple, fast and cost-effective manner.
  • the invention is based on the consideration that a particularly simple and rapid installation of the anode system can be achieved if the inflexible titanium tapes or reticulated titanium anodes can be dispensed with as far as possible or if the tapes only have to be laid linearly. Since it is not necessary to dispense with a planar laying of the anode system, a second material is used in addition to the titanium tapes, which can be laid particularly easily and flexibly. It was recognized that a linear bundle of several carbon fiber filaments, a so-called carbon fiber multifilament, both has sufficient flexibility for the areal laying, as well as a sufficiently high electrical conductivity has, in order to come as an anode system for the cathodic protection in question. In addition, such a carbon fiber multifilament by the meter is inexpensive and easy available, whereby a significant cost savings in the construction of an anode system is possible.
  • the carbon fiber multifilament is meandered or in individual strips, which are connected to each other in parallel and via the primary anode bands, designed so as to achieve a particularly uniform distribution and allow the meandering arches or the strip ends a particularly simple contact with the primary anode belt.
  • this is electrically connected to a plurality of contact areas with a linearly laid titanium anode band, for example, and this primary anode band is connected to a primary anode wire.
  • This primary anode wire can then be connected to the positive pole of a voltage source as already explained above.
  • cathodic corrosion protection in steel structures (such as docks) or pipelines and pipelines, this can also be used in the context of reinforced concrete structures. It is subsequently to equip the reinforced concrete structures with a cathodic corrosion protection or to consider this directly in a new building.
  • the carbon fiber multifilament for fixing to the concrete can also be glued to this.
  • a conductive adhesive can be used, with which the carbon fiber element is fixed in individual points or over the entire area on the concrete. This method can be used in particular in the renovation of old concrete surfaces.
  • the adhesive used in this case comprises in a particularly preferred embodiment ionic additives and water to conduct itself electrolytically.
  • the carbon fiber multifilament is wound in the contact regions around the primary anode belt in a particularly advantageous embodiment. This creates a large number of contacts in these areas, via which the current can be transferred from the primary anode band to the carbon fiber multifilament.
  • the contact areas are enclosed in a preferred embodiment with epoxy resin. Due to the shrinkage of the epoxy resin after application, the contact between the carbon fiber multifilament and the primary anode tape is further improved. The shrinkage of the epoxy resin is thus used specifically to enhance the contact between the carbon fiber multifilament and the primary anode tape.
  • a primary metallic anode it is preferably isolated so as not to act as a current supplying anode itself. The insulation thus prevents current from being conducted directly into the electrolytes and too little current entering the actual anode. In Preferred embodiment, therefore, the epoxy resin used is non-conductive or insulating.
  • the advantages achieved by the invention are, in particular, that a particularly simple and inexpensive surface application of an anode system is made possible by the use of a carbon fiber multifilament. A recourse to a laying less flexible fabric or a mat as an anode system can thus be avoided.
  • the current continues to be conducted via linearly laid primary sands, for example made of titanium strip, and then passed on via the contact areas to the carbon fiber multifilament and thus distributed over a wide area.
  • a reinforced concrete structure 1 is shown, wherein the steel reinforcement or the reinforcing steel 2 is protected by means of an applied voltage 4 from corrosion.
  • Such cathodic corrosion protection becomes necessary because, due to various processes such as carbonation and, in particular, the action of chlorides, the passivation of reinforcing steel 2 can be locally canceled.
  • anodic areas that result in metal dissolution and cathodic areas in which O2 is formed result in overall formation of localized corrosive foci.
  • an electrical voltage is applied between the corroding reinforcement and an anode connected to the component.
  • the primary protective effect is based on the polarization shifting the electrochemical reaction equilibria enough to suppress the material dissolution in the anodic regions in favor of the cathodic partial reaction.
  • Another primary protective effect is that even the passive areas of the corroding reinforcement are cathodically polarized, so that the driving force for the corrosion process is missing. While the primary protective effects come into play very quickly, the secondary protective effects, such as the increase in OH concentration at the surface of the reinforcement, become secondary or the depletion of oxygen in the vicinity of the reinforcement as a result of the cathodic reaction and the migration of the negatively charged Cl - ions toward the anode, effective only later, but then lead to a reduction of the protective current density.
  • An anode system 8 was applied to the existing concrete 6 with reinforcing steel 2.
  • the anode system 8 in this case comprises a bundle of carbon fiber filaments, a so-called carbon fiber multifilament, 10, which is arranged meander-shaped on the concrete 6.
  • a so-called carbon fiber multifilament 10
  • two primary anode ribbons 12 in the form of titanium ribbons are arranged.
  • the meandering bends of the 14 Karbonmaschinemultifilaments 10 wrap around the titanium strips 12 to allow an electrical connection.
  • the titanium strips 12 are connected via a primary anode wire, not shown, to the positive pole of the voltage source 4.
  • This voltage can be controlled via a remote monitoring system, not shown, so that the state of the building or the reinforced concrete structure can be detected and continuously monitored.
  • the anode system 8 arranged on the concrete is covered in the exemplary embodiment by a conductive mortar 16 so as to be protected against external influences and access.
  • the primary anode belt 12 is shown in cross-section to a contact region 18 in various embodiments.
  • the primary anode tape 12 wrapped by the carbon fiber multifilament 10 lies in a previously milled or cut slot 20 of the concrete 6.
  • This slot 20 has been filled with a grout 16 in a further working step so as to protect the primary anode tape and also the carbon fiber multifilament 10.
  • the primary anode tape 12 wrapped by the carbon fiber multifilament 10 is placed in a slot 20 in the concrete.
  • the primary anode belt 12 and the carbon fiber multifilament 10 are enclosed by an epoxy resin 22 in this embodiment.
  • an epoxy resin 22 in this embodiment.
  • This additionally protects the primary anode tape 12 and the carbon fiber multifilament 10 and, due to the shrinkage of the epoxy resin 22 after application, provides for particularly close contact.
  • a grout 16 is also used here.
  • the primary sorbent tape 12 wrapped by the carbon fiber multifilament 10 in FIG Figure 2c lies directly on the concrete 6.
  • the anode system in this case is covered with a layer of conductive mortar 16 so that it is fixed on the concrete.
  • the primary anode tape 12 wrapped by the carbon fiber multifilament 10 in FIG Figure 2d before being covered by the conductive mortar is fixed to the concrete with a conductive adhesive 24.
  • the attachment options for the primary anode belt shown here can also be transferred to the carbon fiber multifilament. Again, this can be cast in slots in the concrete, with epoxy resin, glued to the concrete or covered with a layer of conductive mortar.
  • the filaments 10 are arranged on an insulating fiberglass composite reinforcement 28.
  • the filaments 10 are fastened with binders 30 to this glass fiber composite reinforcement 28 and then also the composite of filament and glass fiber composite reinforcement 28 with other binders 32 on the steel reinforcement 2.
  • FIG. 4 are schematic illustrations of the individual process steps in the application of an anode system 8 with a carbon fiber multifilament 10 is shown.
  • the carbon fiber multifilament 10 is applied meandering on the concrete 6.
  • slits are cut or milled into the concrete into which the carbon fiber multifilament 10 can be inserted.
  • the meandering bends 14 are intentionally extended so that a loose loop of carbon fiber multifilament 10 is formed.
  • the slots can then be filled with grout to already have a fixation of the carbon fiber multifilament on the concrete 6 for the further steps.
  • the titanium strips 12 are laid as a primary anode in the area of the meandering arches 14. Due to the laid down carbon fiber multifilament 10, it is now possible to design the titanium strips 12 linear. Thus, a complex and complicated deformation of the titanium strips 12 can be dispensed with. Again, it is possible that previously appropriate slots are introduced into the concrete 6, in which the titanium strips 12 can be sunk.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Claims (8)

  1. Procédé de pose d'un système anodique (8) destiné à une protection anticorrosion cathodique, comprenant les pas suivants:
    - pose plane d'un multifilament de fibres carbonés (10);
    - pose d'au moins deux bandes d'anode primaires (12) placées de manière espacée l'une de l'autre, de sorte que le multifilament de fibres carbonés (10) soit placé entre les bandes d'anode primaires (12) et que les bandes d'anode primaires (12) soient reliées de manière conductrice électriquement avec le multifilament de fibres carbonés (10) dans un nombre de largeurs virtuelles du contact (18);
    caractérisé en ce que
    - le multifilament de fibres carbonés (10) est posé en méandres ou en bandes individuelles qui sont parallèles l'une à l'autre et reliées l'une avec l'autre par les bandes d'anode primaires.
  2. Procédé de pose d'un système anodique (8) selon la revendication 1, caractérisé en ce que les bandes d'anode primaires (12) sont ensuite reliées avec un fil d'anode primaire.
  3. Procédé de pose d'un système anodique (8) selon la revendication 1 ou 2, caractérisé en ce que, dans le cas de la protection d'une construction en béton armé, le multifilament de fibres carbonés (10) est posé dans des rainures préparées dans le béton.
  4. Procédé de pose d'un système anodique (8) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le multifilament de fibres carbonés (10) est fixé au moyen d'une colle (24).
  5. Procédé de pose d'un système anodique (8) selon la revendication 1, caractérisé en ce que, dans le cas de la protection de constructions en béton armé, le multifilament de fibres carbonés (10) est posé dans le béton ou le mortier frais.
  6. Procédé de pose d'un système anodique (8) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le multifilament de fibres carbonés (10) est bobiné, dans les largeurs virtuelles du contact (18), autour de la bande d'anode primaire (12), au moins en partie.
  7. Procédé de pose d'un système anodique (8) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que de la résine époxy (22) est utilisée pour relier le multifilament de fibres carbonés (10) et la bande d'anode primaire (12) aux largeurs virtuelles du contact (18).
  8. Procédé de pose d'un système anodique (8) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le multifilament de fibres carbonés (10) et/ou la bande d'anode primaire (12) sont recouverts de mortier conducteur (16).
EP16769903.2A 2015-09-10 2016-09-12 Procédé de pose d'un système anodique destiné à une protection anticorrosion cathodique Active EP3347507B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015115297.5A DE102015115297A1 (de) 2015-09-10 2015-09-10 Verfahren zur Verlegung eines Anodensystems für einen kathodischen Korrosionsschutz
PCT/EP2016/071458 WO2017042387A1 (fr) 2015-09-10 2016-09-12 Procédé de pose d'un système anodique destiné à une protection anticorrosion cathodique

Publications (2)

Publication Number Publication Date
EP3347507A1 EP3347507A1 (fr) 2018-07-18
EP3347507B1 true EP3347507B1 (fr) 2019-08-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16769903.2A Active EP3347507B1 (fr) 2015-09-10 2016-09-12 Procédé de pose d'un système anodique destiné à une protection anticorrosion cathodique

Country Status (4)

Country Link
US (1) US20190119819A1 (fr)
EP (1) EP3347507B1 (fr)
DE (1) DE102015115297A1 (fr)
WO (1) WO2017042387A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3640370A1 (fr) * 2018-10-17 2020-04-22 Koch GmbH Non-tissé à anode primaire
US11261530B2 (en) * 2019-03-11 2022-03-01 Prorbar, Inc. Cathodic protection system and miniaturized constant current rectifier
CN115504748B (zh) * 2022-10-28 2023-06-20 广州市克来斯特建材科技有限公司 一种牺牲阳极保护层砂浆及其制备方法和应用

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NO905454D0 (no) * 1990-12-18 1990-12-18 Sten Henning Vaelitalo Fremgangsmaate for repassivering av armeringsjern beliggende i karbonatisert betong.
US5340455A (en) * 1993-01-22 1994-08-23 Corrpro Companies, Inc. Cathodic protection system for above-ground storage tank bottoms and method of installing
US5411646A (en) * 1993-05-03 1995-05-02 Corrpro Companies, Inc. Cathodic protection anode and systems
NO305842B1 (no) * 1997-10-09 1999-08-02 Per Austnes FremgangsmÕte for katodisk beskyttelse, elektrokjemisk kloriduttrekk og realkalisering i armert betong eller lignende materialer samt forsterkning og rissforebyggelse i betong
US6572760B2 (en) * 1999-02-05 2003-06-03 David Whitmore Cathodic protection
EP1318247A1 (fr) * 2001-12-07 2003-06-11 Sika Schweiz AG Structure de béton
US20140251793A1 (en) * 2013-03-07 2014-09-11 Sae Inc. Cathodic protection current distribution method and apparatus for corrosion control of reinforcing steel in concrete structures
US20140305806A1 (en) * 2013-04-16 2014-10-16 Shenzhen University Cathode Protection Method and Apparatus for Reinforced Concrete Structure and Composite Structure and Processing Method for Reinforced Concrete Structure
CN107953572A (zh) * 2013-06-05 2018-04-24 马克弗巨德有限公司 用于纤维增强添加制造的方法

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Also Published As

Publication number Publication date
EP3347507A1 (fr) 2018-07-18
WO2017042387A1 (fr) 2017-03-16
US20190119819A1 (en) 2019-04-25
DE102015115297A1 (de) 2017-03-16

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