EP0357094B1 - Anode für kathodischen Korrosionsschutz - Google Patents

Anode für kathodischen Korrosionsschutz Download PDF

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Publication number
EP0357094B1
EP0357094B1 EP89201485A EP89201485A EP0357094B1 EP 0357094 B1 EP0357094 B1 EP 0357094B1 EP 89201485 A EP89201485 A EP 89201485A EP 89201485 A EP89201485 A EP 89201485A EP 0357094 B1 EP0357094 B1 EP 0357094B1
Authority
EP
European Patent Office
Prior art keywords
anode
core
concrete
ion
conducting
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.)
Expired - Lifetime
Application number
EP89201485A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0357094A1 (de
Inventor
Stephan Kotowski
Reinhard Bedel
Bernd Busse
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.)
De Nora Deutschland GmbH
Original Assignee
Heraeus Elektrochemie GmbH
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 Heraeus Elektrochemie GmbH filed Critical Heraeus Elektrochemie GmbH
Priority to AT89201485T priority Critical patent/ATE79420T1/de
Publication of EP0357094A1 publication Critical patent/EP0357094A1/de
Application granted granted Critical
Publication of EP0357094B1 publication Critical patent/EP0357094B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C23F13/18—Means for supporting 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 an anode for cathodic corrosion protection of a steel reinforcement in concrete, which has a core made of valve metal with an activation layer covering it made of metals or oxides of the platinum metal group, as well as its use and a method for cathodic corrosion protection.
  • WO-A-86/06758 and Wo-A-86/06759 disclose the use of expanded metals made of titanium and other valve metals or their alloys as electrodes in the cathodic corrosion protection of concrete.
  • the expanded metal wound on rolls can be applied to the surfaces to be protected by simple unwinding, whereby a diamond-shaped mesh pattern enables uniform current distribution with sufficient redundancy and a current density for long-term operation of 100 mA / m2 can be achieved through electrocatalytic coating.
  • the invention has for its object to provide anodes which can be attached directly to the reinforcement or placed in a reinforcement cage without short-circuits occurring when pouring and stirring the in-situ concrete in the formwork; Furthermore, the anodes should be used in the manufacture of prefabricated concrete parts and in the formwork for the manufacture of concrete structures.
  • the anode consists of a strip-shaped expanded metal grid made of titanium or titanium alloy provided with an activation coating, which is cast into ion-conducting material, the anode being in the form of a rod with a round, oval or angular cross section; cement mortar or concrete is used as the ion-conducting material, the mechanical properties of which correspond to those of the concrete to be protected; the cement mortar has at least the same ionic conductivity as the concrete to be protected; hereinafter the cement mortar is also referred to as concrete.
  • the rod conductors made of titanium or titanium alloy are led out, which with the expanded metal grid z. B. are electrically connected by welding.
  • the expanded metal grid is surrounded by an activation layer, which enables current to be transported into the ion-conducting part of the anode in an electrocatalytic manner.
  • Metals or oxides of the platinum metal group are preferably used for coating the lattice.
  • anode according to the invention can be used as a formwork element of a concrete formwork instead of the commonly used formwork timbers;
  • the economical use of activated titanium expanded metal has proven to be particularly advantageous, whereby the narrow, elongated shape of the anode means that columns, trusses, stairs but also walls or levels made of concrete can be protected in a simple manner; due to the composite structure of the anode, no destruction of the anode occurs when the concrete is installed or compacted.
  • FIG. 1 shows an embodiment of the anode according to the invention
  • FIG. 2 shows the use of the anode in the reinforcement box of a concrete pillar.
  • the anode 1 consists of an electron-conducting core 2 designed as an expanded metal grid in a rectangular shape and an ion-conducting jacket 3 made of cement-rich mortar, the expanded metal grid being completely enclosed by the cuboid-shaped ion-conducting jacket 3.
  • a bolt 5, 6 made of titanium or titanium alloy serving as an electrical connection is connected to the expanded metal grid by spot welding.
  • the expanded metal grid has a flat surface and its narrow sides 4 are arranged parallel to the surface diagonals of the narrow sides 7, 8 of the ion-conducting jacket 3.
  • the bolts 5, 6 are each led out in the middle of the narrow sides 7, 8 and provided with an insulating jacket. According to Figure 1, for better clarity in the broken area of the jacket 3 of the concrete located below the expanded metal grid with reference number 3 ', while the concrete located above the expanded metal grid is provided with reference number 3 ⁇ .
  • the anode according to the invention is produced in a cuboid formwork, the expanded metal grid serving as core 2 being suspended on its two bolts 5, 6 in the formwork such that the narrow sides 4 of the grid run diagonally to the rectangular head ends of the formwork. After adding cement-rich mortar and curing the mortar, the formwork can be removed.
  • FIG. 2 shows the use of the anode according to the invention in the reinforcement box of a concrete pillar, only a section of the iron reinforcement 9 being shown for a better overview.
  • the anode 1 is bound by tape material 10 in a simple manner to two superimposed, parallel reinforcement bars 11, the ion-conducting sheath 3 touching the reinforcement bars preventing any risk of short-circuiting between the reinforcement bars 11 and the expanded metal grid 2.
  • several such anodes can also be used in a reinforcement box.
  • the in-situ concrete is then filled in, the in-situ concrete entering into a force-locking, ion-conducting connection with the ion-conducting jacket 3 of the anode 1. After the concrete has hardened, the anode and reinforcement are connected to a DC voltage source.
  • a further use of the anode according to the invention is possible in the production of prefabricated concrete parts, the anode being introduced into a mold for the prefabricated concrete part and then surrounded by poured concrete.
  • anode according to the invention can be used as a formwork element for the production of reinforced concrete structures;
  • the option of providing two slack reinforcements in one operation with a corrosion protection system has proven to be particularly expedient by replacing both the front wall and the rear wall of the hitherto customary formwork with plate-shaped anodes or with precast concrete parts with cast-in anodes according to the invention.

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)
EP89201485A 1988-08-09 1989-05-30 Anode für kathodischen Korrosionsschutz Expired - Lifetime EP0357094B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89201485T ATE79420T1 (de) 1988-08-09 1989-05-30 Anode fuer kathodischen korrosionsschutz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826926 1988-08-09
DE3826926A DE3826926A1 (de) 1988-08-09 1988-08-09 Anode fuer kathodischen korrosionsschutz

Publications (2)

Publication Number Publication Date
EP0357094A1 EP0357094A1 (de) 1990-03-07
EP0357094B1 true EP0357094B1 (de) 1992-08-12

Family

ID=6360468

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89906356A Pending EP0380602A1 (de) 1988-08-09 1989-05-30 Anode für kathodischen korrosionsschutz
EP89201485A Expired - Lifetime EP0357094B1 (de) 1988-08-09 1989-05-30 Anode für kathodischen Korrosionsschutz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89906356A Pending EP0380602A1 (de) 1988-08-09 1989-05-30 Anode für kathodischen korrosionsschutz

Country Status (7)

Country Link
US (1) US5609748A (enrdf_load_stackoverflow)
EP (2) EP0380602A1 (enrdf_load_stackoverflow)
AT (1) ATE79420T1 (enrdf_load_stackoverflow)
DE (2) DE3826926A1 (enrdf_load_stackoverflow)
ES (1) ES2034589T3 (enrdf_load_stackoverflow)
GR (1) GR3006226T3 (enrdf_load_stackoverflow)
WO (1) WO1990001570A1 (enrdf_load_stackoverflow)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI87241C (fi) * 1990-06-20 1992-12-10 Savcor Consulting Oy Foerfarande foer att faesta ett elektrodarrangemang som anvaends vid katodisk skydd av betongkonstruktioner samt faestelement
US5531873A (en) * 1990-06-20 1996-07-02 Savcor-Consulting Oy Electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element
GB9015743D0 (en) * 1990-07-17 1990-09-05 Pithouse Kenneth B The protection of cementitious material
CA2115422A1 (en) * 1991-08-15 1993-03-04 Isaac Solomon Impressed current cathodic protection system
AU658444B2 (en) * 1991-08-15 1995-04-13 Solomon Corrosion Consulting Services Pty Ltd Impressed current cathodic protection system
JP3040613B2 (ja) * 1992-10-07 2000-05-15 大日本塗料株式会社 鉄筋コンクリート構造物の防食方法
EP1042535B1 (en) * 1998-10-29 2005-11-16 Fosroc International Limited Connector for use in cathodic protection and method of use
GB9823654D0 (en) 1998-10-29 1998-12-23 Fosroc International Ltd Connector for use in cathodic protection and method of use
US6165346A (en) * 1999-02-05 2000-12-26 Whitmore; David Cathodic protection of concrete
US7276144B2 (en) * 1999-02-05 2007-10-02 David Whitmore Cathodic protection
US6572760B2 (en) 1999-02-05 2003-06-03 David Whitmore Cathodic protection
US6346188B1 (en) * 2000-03-24 2002-02-12 Enser Corporation Battery-powered cathodic protection system
US20060005967A1 (en) * 2002-08-19 2006-01-12 Sirola D B Deep well anodes for electrical grounding
US7578910B2 (en) * 2002-08-19 2009-08-25 Sae Inc. Deep well anodes for electrical grounding
US20040099982A1 (en) * 2002-08-19 2004-05-27 Sirola D. Brien Conductive concrete compositions and methods of manufacturing same
EP1759189A4 (en) * 2004-06-03 2015-02-25 John E Bennett ANODE ASSEMBLY FOR CATHODE PROTECTION
US7230347B2 (en) * 2005-10-14 2007-06-12 General Electric Company Corrosion protection for wind turbine units in a marine environment
DE102006037706A1 (de) * 2006-08-11 2008-02-14 Pci Augsburg Gmbh Verfahren zum kathodischen Korrosionsschutz der Bewehrungen von Stahlbetonwerken
WO2010067317A2 (en) * 2008-12-11 2010-06-17 Codensa S.A. Esp Electric energy distribution pole with incorporated ground system
EP2431496A1 (en) * 2010-09-17 2012-03-21 Soletanche Freyssinet Composite anode for a cathodic protection system
US9499915B2 (en) 2013-03-15 2016-11-22 Saudi Arabian Oil Company Encapsulated impressed current anode for vessel internal cathodic protection
CA2988847A1 (en) 2017-08-14 2019-02-14 Shore Acres Enterprises Inc. Corrosion-protective jacket for electrode
CA3019309A1 (en) 2017-10-04 2019-04-04 Shore Acres Enterprises Inc. (D/B/A Sae Inc.) Electrically-conductive corrosion-protective covering
US11261530B2 (en) * 2019-03-11 2022-03-01 Prorbar, Inc. Cathodic protection system and miniaturized constant current rectifier
CA3092850A1 (en) 2019-12-18 2021-06-18 Shore Acres Enterprises Inc. Metallic structure with water impermeable and electrically conductive cementitious surround
CN113152508B (zh) * 2021-05-08 2022-07-15 河南四达电力设备股份有限公司 一种导电混凝土外壳、杆塔混凝土基础以及施工工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133872A (en) * 1959-03-10 1964-05-19 Chemionics Engineering Lab Inc Anode for electrochemical applications
FR1261438A (fr) * 1960-04-08 1961-05-19 Contre La Corrosion Soc Et Procédé et dispositif pour évaluer à poste fixe le potentiel des structures métalliques
US4255241A (en) * 1979-05-10 1981-03-10 Kroon David H Cathodic protection apparatus and method for steel reinforced concrete structures
CA1235088A (en) * 1983-12-13 1988-04-12 Richard F. Stratfull Anodes for cathodic protection
US4900410A (en) * 1985-05-07 1990-02-13 Eltech Systems Corporation Method of installing a cathodic protection system for a steel-reinforced concrete structure
JPS62503040A (ja) * 1985-05-07 1987-12-03 エルテック・システムズ・コ−ポレ−ション スチ−ル強化コンクリ−ト構造物用の陰極防食システムおよびその設置方法
US4692066A (en) * 1986-03-18 1987-09-08 Clear Kenneth C Cathodic protection of reinforced concrete in contact with conductive liquid
US4855024A (en) * 1986-09-16 1989-08-08 Raychem Corporation Mesh electrodes and clips for use in preparing them
CA2018869A1 (en) * 1989-07-07 1991-01-07 William A. Kovatch Mesh anode and mesh separator for use with steel-reinforced concrete

Also Published As

Publication number Publication date
US5609748A (en) 1997-03-11
WO1990001570A1 (de) 1990-02-22
ATE79420T1 (de) 1992-08-15
EP0357094A1 (de) 1990-03-07
EP0380602A1 (de) 1990-08-08
DE58902035D1 (de) 1992-09-17
GR3006226T3 (enrdf_load_stackoverflow) 1993-06-21
DE3826926A1 (de) 1990-02-15
ES2034589T3 (es) 1993-04-01

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