EP2616568B1 - Anode for cathodic protection and method for manufacturing the same - Google Patents

Anode for cathodic protection and method for manufacturing the same Download PDF

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Publication number
EP2616568B1
EP2616568B1 EP11757856.7A EP11757856A EP2616568B1 EP 2616568 B1 EP2616568 B1 EP 2616568B1 EP 11757856 A EP11757856 A EP 11757856A EP 2616568 B1 EP2616568 B1 EP 2616568B1
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EP
European Patent Office
Prior art keywords
ribbon
length
metal ribbon
cathodic protection
knives
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.)
Active
Application number
EP11757856.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2616568A1 (en
Inventor
Corrado Mojana
Simone Tremolada
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.)
Industrie de Nora SpA
Original Assignee
Industrie de Nora SpA
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Publication date
Application filed by Industrie de Nora SpA filed Critical Industrie de Nora SpA
Priority to PL11757856T priority Critical patent/PL2616568T3/pl
Publication of EP2616568A1 publication Critical patent/EP2616568A1/en
Application granted granted Critical
Publication of EP2616568B1 publication Critical patent/EP2616568B1/en
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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
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • B21D31/043—Making use of slitting discs or punch cutters
    • 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 the field of cathodic protection of reinforced concrete structures, and in particular to a design of anode particularly efficient in terms of electrical resistance per unit length and of flexibility, and particularly safe to install and handle.
  • the invention also relates to the method of production of such anode.
  • cathodic protection of reinforced concrete is practised by coupling anodic structures of various kinds to the concrete, respect to which the reinforcement to be protected acts as a cathodic counterelectrode; the electrical currents involved supported by an external rectifier transit across the electrolyte consisting of the porous concrete partially soaked with a salty solution.
  • the anodes commonly used for the cathodic protection of reinforced concrete consist of a titanium substrate coated with transition metal oxides or other types of catalysts for anodic oxygen evolution.
  • European Patent EP458951 discloses a grid-type electrodic structure for cathodic protection consisting of a plurality of metal ribbons having an electrocatalytic coating, said metal ribbons having voids of different geometries.
  • This type of ribbons can be manufactured by punching of solid metal ribbons or more commonly by the traditional methods of metal expansion wherein a metal sheet is expanded by pressuring and punching through a series of knives arranged orthogonal to the advancement direction of the ribbon itself.
  • This first step allows obtaining an expanded metal sheet.
  • Such sheet is then subjected to a second step of cutting suitable for obtaining ribbons of the required dimensions.
  • Said expanded metal ribbons present meshes having voids of rhomboidal shape with the major diagonal oriented orthogonal to the ribbon length.
  • This method of manufacturing has the inconvenience of producing metal ribbons with meshes having cutting side protrusions automatically formed during the operation of cutting, making these anodes difficult to handle and the installation phase accordingly dangerous.
  • the invention relates to an anode in form of mesh ribbon for systems of cathodic protection, for instance of cathodic protection of reinforced concrete structures, overcoming the inconveniences of the prior art, whose edges are substantially free of discontinuities in form of cutting protrusions and have a sinusoidal shape.
  • the invention relates to a method for manufacturing said anode.
  • the invention relates to a cathodic protection system comprising at least one anode in form of mesh ribbon whose edges are substantially free of cutting protrusions.
  • the anode according to the invention consists of a ribbon of expanded metal characterised by meshes with rhomboidal shaped voids with the major diagonal oriented along the direction of the ribbon length.
  • the lateral edges of the ribbon have a sinusoidal profile and are free of cutting protrusions.
  • an anode for cathodic protection displays a remarkably reduced ohmic resistance per unit length, for instance up to 4-fold reduced, with respect to the anodes of the prior art.
  • the lower electrical resistance makes possible to reduce the number of electrical connections, for instance in a grid system, with sensible savings of material and installation time.
  • the metal mesh ribbon is made of titanium.
  • the metal mesh ribbon is coated with a catalytic coating containing noble metals or oxides thereof.
  • the dimensions of the ribbon can have a width ranging from 3 mm to 100 mm with a thickness of 0.25 mm to 2.5 mm and a length of 1 m to 150 m.
  • Fig. 1A shows a top view of the traditional anode in which are distinguishable cutting protrusions 1 due to the manufacturing method including a cutting step, the rhomboidal geometry with major diagonal 3 of rhomboidal voids arranged in the direction of the ribbon width and the minor diagonal 4 of the same arranged in the direction of the ribbon length.
  • Fig. 1B shows a top-view of the anode according to the invention in which are distinguishable non-cutting blunt lateral edges 2 , the rhomboidal geometry with major diagonal 3 of rhomboidal voids arranged in the direction of the ribbon length and the minor diagonal 4 of the same arranged in the direction of the ribbon width.
  • Anodes labelled A and B are anodes of rhomboidal geometry with the major diagonal of rhomboids oriented orthogonal to the ribbon length likewise depicted in Fig. 1A , traditionally obtained by longitudinal expansion with respect to the displacement direction of a solid metal ribbon.
  • Anodes labelled C and D are anodes of rhomboidal geometry according to one embodiment of the invention, likewise depicted in Fig. 1B .
  • Anodes C and D were prepared by orthogonal expansion with respect to the displacement direction of a solid metal ribbon allowed to run in an apparatus along a parallel row of knives which expand the solid ribbon in an orthogonal direction by pressuring and punching.
  • the ribbon manufacturing is completed by means of a last series of knives, having blades of predefined length higher than the blades of previous knives, which upon applying a pressure are suitable for modelling the lateral edge of the ribbon as depicted in Fig. 1B .
  • this method has the advantage of providing an expanded metal ribbon free of longitudinally-extending solid sections which, being not subsequently cut, does not present any cutting edge and is therefore much safer and easy to handle during the installation.
  • This method moreover allows to advantageously obtain a metal ribbon of the desired length directly upon completion of the expansion.
  • Such method of production furthermore allows obtaining ribbons of higher length than the traditional method thereby facilitating big size installation which would require connections of multiple ribbons, with a lower solidity of the overall anodic system.
  • the anodes of the invention display an ohmic resistance about 60% lower.
  • Table 1 Anodes in accordance with Fig. 1A R- Ohmic Resistance A - 20mm wide 0.22 Ohm/m B - 10mm wide 0.43 Ohm/m Anodes in accordance with Fig. 1B R- Ohmic Resistance C - 20mm wide 0.088 Ohm/m D - 10mm wide 0.177 Ohm/m

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Building Environments (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
EP11757856.7A 2010-09-17 2011-09-15 Anode for cathodic protection and method for manufacturing the same Active EP2616568B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11757856T PL2616568T3 (pl) 2010-09-17 2011-09-15 Anoda do ochrony katodowej i sposób jej wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001689A ITMI20101689A1 (it) 2010-09-17 2010-09-17 Anodo per protezione catodica e metodo per il suo ottenimento
PCT/EP2011/066021 WO2012035107A1 (en) 2010-09-17 2011-09-15 Anode for cathodic protection and method for manufacturing the same

Publications (2)

Publication Number Publication Date
EP2616568A1 EP2616568A1 (en) 2013-07-24
EP2616568B1 true EP2616568B1 (en) 2018-11-21

Family

ID=43738911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11757856.7A Active EP2616568B1 (en) 2010-09-17 2011-09-15 Anode for cathodic protection and method for manufacturing the same

Country Status (25)

Country Link
US (2) US20130168261A1 (es)
EP (1) EP2616568B1 (es)
JP (1) JP6068343B2 (es)
KR (1) KR20140001837A (es)
CN (1) CN103119201B (es)
AR (1) AR084116A1 (es)
AU (1) AU2011303882B2 (es)
BR (1) BR112013006334B1 (es)
CA (1) CA2808397C (es)
CO (1) CO6680713A2 (es)
DK (1) DK2616568T3 (es)
EA (1) EA024024B1 (es)
EC (1) ECSP13012490A (es)
ES (1) ES2711605T3 (es)
HK (1) HK1185386A1 (es)
IT (1) ITMI20101689A1 (es)
MA (1) MA34596B1 (es)
MX (1) MX2013002844A (es)
MY (1) MY159927A (es)
NZ (1) NZ606985A (es)
PE (1) PE20140396A1 (es)
PL (1) PL2616568T3 (es)
PT (1) PT2616568T (es)
SG (1) SG188189A1 (es)
WO (1) WO2012035107A1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763506A (zh) * 2015-04-09 2015-07-08 上海天纳克排气系统有限公司 排气系统
US10376946B1 (en) * 2016-05-25 2019-08-13 James E. Ealer, Sr. System and method of making an expanded metal gutter cover having a solid edge margin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223497A (en) * 1940-03-01 1940-12-03 Bostwick Steel Lath Company Expanded metal lath cutting machine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR450528A (fr) * 1912-10-24 1913-03-27 The Universal Metal Lath And Patent Company Machine à fendre et à repousser les feuilles de métal
US3162925A (en) * 1962-04-24 1964-12-29 Robert M Felsenthal Apparatus for producing expanded metal
US3607411A (en) * 1968-03-21 1971-09-21 Exmet Corp Prestretched expanded metal and method of making it
JPS50140359A (es) * 1974-04-27 1975-11-11
US5421968A (en) * 1985-05-07 1995-06-06 Eltech Systems Corporation Cathodic protection system for a steel-reinforced concrete structure
US4923583A (en) * 1985-11-04 1990-05-08 Olin Corporation Electrode elements for filter press membrane electrolytic cells
IT209004Z2 (it) * 1986-12-30 1988-09-02 Magneti Marelli Spa Macchina per la realizzazione di un nastro grigliato di lega di metallo o di materia plastica utilizzabile per la fabbricazione di piastre per accumulatori
GB8903321D0 (en) * 1989-02-14 1989-04-05 Ici Plc Metal mesh and production thereof
CA2018869A1 (en) * 1989-07-07 1991-01-07 William A. Kovatch Mesh anode and mesh separator for use with steel-reinforced concrete
US5062934A (en) 1989-12-18 1991-11-05 Oronzio Denora S.A. Method and apparatus for cathodic protection
CA2078616A1 (en) * 1991-09-20 1993-03-21 James B. Bushman Cathodic protection anode and method
WO1996030561A1 (en) * 1995-03-24 1996-10-03 Alltrista Corporation Jacketed sacrificial anode cathodic protection system
US6139705A (en) * 1998-05-06 2000-10-31 Eltech Systems Corporation Lead electrode
JP4899239B2 (ja) * 2000-08-03 2012-03-21 パナソニック株式会社 エキスパンド網目シートの製造方法および鉛蓄電池用格子体の製造方法
ITMI20080714A1 (it) * 2008-04-18 2009-10-19 Industrie De Nora S P A Anodo per protezione catodica

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223497A (en) * 1940-03-01 1940-12-03 Bostwick Steel Lath Company Expanded metal lath cutting machine

Also Published As

Publication number Publication date
MX2013002844A (es) 2013-06-18
ECSP13012490A (es) 2013-04-30
CA2808397A1 (en) 2012-03-22
NZ606985A (en) 2014-12-24
ITMI20101689A1 (it) 2012-03-18
EA201390399A1 (ru) 2013-07-30
MA34596B1 (fr) 2013-10-02
HK1185386A1 (zh) 2014-02-14
BR112013006334B1 (pt) 2020-01-21
CN103119201A (zh) 2013-05-22
PL2616568T3 (pl) 2019-05-31
CN103119201B (zh) 2015-12-16
SG188189A1 (en) 2013-04-30
PT2616568T (pt) 2019-02-25
CO6680713A2 (es) 2013-05-31
DK2616568T3 (en) 2019-02-18
EA024024B1 (ru) 2016-08-31
JP2013537261A (ja) 2013-09-30
PE20140396A1 (es) 2014-04-23
AU2011303882B2 (en) 2015-01-22
WO2012035107A1 (en) 2012-03-22
AU2011303882A1 (en) 2013-02-28
US20160040302A1 (en) 2016-02-11
AR084116A1 (es) 2013-04-24
MY159927A (en) 2017-02-15
JP6068343B2 (ja) 2017-01-25
ES2711605T3 (es) 2019-05-06
BR112013006334A2 (pt) 2016-06-21
CA2808397C (en) 2019-12-03
US20130168261A1 (en) 2013-07-04
EP2616568A1 (en) 2013-07-24
KR20140001837A (ko) 2014-01-07

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