CA2064701A1 - Method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element - Google Patents
Method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing elementInfo
- Publication number
- CA2064701A1 CA2064701A1 CA002064701A CA2064701A CA2064701A1 CA 2064701 A1 CA2064701 A1 CA 2064701A1 CA 002064701 A CA002064701 A CA 002064701A CA 2064701 A CA2064701 A CA 2064701A CA 2064701 A1 CA2064701 A1 CA 2064701A1
- Authority
- CA
- Canada
- Prior art keywords
- fixing
- anode
- framework
- concrete
- electrode arrangement
- 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.)
- Abandoned
Links
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
- C23F13/18—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
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)
- Orthopedics, Nursing, And Contraception (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measurement Of Force In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to a method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures. In the method, an anode (20) is mounted in a framework (11) and the framework with its anodes is mounted on the concrete structure at a production plant or in the mounting step before the concreting step. The invention also relates to a mixing element (10) of the electrode arrangement to be used in the cathodic protection of concrete structures, which fixing element is comprised of an anode (20) and a framework (11), which framework (11) is provided with means (15) for fixing the element (10) to the concrete structure.
The invention relates to a method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures. In the method, an anode (20) is mounted in a framework (11) and the framework with its anodes is mounted on the concrete structure at a production plant or in the mounting step before the concreting step. The invention also relates to a mixing element (10) of the electrode arrangement to be used in the cathodic protection of concrete structures, which fixing element is comprised of an anode (20) and a framework (11), which framework (11) is provided with means (15) for fixing the element (10) to the concrete structure.
Description
WO 91/1~829 lPCr/Fl~ 00191 7 ~ ~
A method for fixing an electrode arrangement ~o be used in the cathodic protection of concrete s~ructures and a fix~ng elemel1t The invention relates to a method for ~ixing an electrode a~rangem nt to be usedin the cathodic protection of concrete structures.
10 Tile invention also relates to a fixing element of an electrode arrangement to be used in the cathodic protection of concrete structures.
In the protection of steel parts of concrete structures, e.g. concrete reinforce-ments, the anodes of an electrode arrangement are generally fixed to an existing15 concrete surface, and the anode is covered with shotcrete or with another corresponding conductive material. However, problerns have been caused by the poor fixability of the electrode arrangement during the casting. Additional problems have also been caused by the fact that the anode is during the casting bent into contact with the steel constructions to be protected.
The above-mentioned situtations have made it considerably more difficult and slower to carry out the actual concrete casting.
The object of the present invention is to provide such an anode fixing arrange-2~ rnent and method, which, when used, eliminates the above-mentioned problem situations.
Another object of the invention is to provide such a fixing arrangement, which well adapts itself to be used in continuos concreting applications.
For reaching the objects mentloned above and to be presented below, the inventive method is mainly characterized in that the anode is mounted in a framework and that the framework with its anodes is mounted on the concrete w~ 9 P~r~
7 (~ ~
structure at a production plant or in the mo1lnting s~ep before the concreting step~
The inventive fixing element is mainly charac~erized in that the fix~ng element is S comprised o~ an anode and a frarnework, which framework is provided with means for ~ing the element to the concrete structure.
Such an inventive anode element placed in position ~efore the concreting is in certain cases ~he only techn~cally sensible solution. When, for example, protecting 10 underwater concrete stmctures, a considerable ad~antage is obtained in the preparation step, when the anode arrangement is of an element-stmctional type.
When using the inventive anode fixing arrangernent, the pressing effect of the additional mass caused by shotcreting is avoided. Furthermore, the number of 15 the work phases needed decreases, since the anode element is prefabricated, and only the fixing of the anode element has to be perforrned in connection with concreting.
The fixing of the inventive element is easy and it saves mounting time, since a 20 separate fixing and insulating work o~ the anode in the mounting step is elirnin-ated.
The inventive element remains fixed on the concrete structures, whereby no special precautionaly measures are needed in the concreting step, e.g. it is not25 necessary to use a slower concreting ra.te.
The construction of the anode elernent according to the invention is mechanical-ly rigid such that it cannot come into an electrical contact with the concrete reinforcements to be protect~d. From the point of view of the operaticn of ~he 30 protection, the avoidance of the electrical contact is one of the ~asic prerequi-sites. In addi~ion, the inventive anode elemen~ cannot move during the concret-ing owing to its fixing means.
W~ 9~ FY~
When using the inventive element, the unirltermptibility of a cath(l(lic contact is also ensured, since the cosmection of all concrete reinforcernent layers to the cathode circ~lit can be ~uaranteed by means of several fia~in~ points.
5 The anode element according to the invention forms a system of several elemen~s such that each element can, when so desired, be eontrolled as a sepa-rate electric circuit. The operation of the anode system is ehereby ensur d.
The invention is next described in more detail with reference to the figures of 10 the accompanying drawing, to which the invention is, however, in no way narrowly limited.
Fig. lA and lB show schematically an inventive anode element.
15 Fig. 2 shows as a schematic partial view an inventive anode element -fixed to a concrete structure.
An inventive anode element 10 showrl in Fig. lA and lB comprises a Framework 11, anodes 20 and fixing rneans 15. The framework 11 is made of an electrically 20 insulating material, e.g. of plastics or ceramics or of an electrolytically conductive material~ e.g. of concrete, plastics or ceramics. When so desired, a steel reinfor-cement OI` some other reinforcement is used for improving the strength prop-erties of the framework 11, which is, however, not necessary.
25 In one preferred embodirment of the invention, the framework 11 of the anode element 10 is made of concrete, since a good adherence to the concreting is ehenobtained. Furthermore, when ehe framework 11 is made of concrete, possible detrimental heat expansion phenomena are eliminated.
.
30 The ànode elernent 10 is fixed to a concrete surface, to concrete reinforcements or to other fixed parts of ~he construction or to parts usecl during the moun~ing with the fixing means 15 of ~he framework 11, e.~. ~vieh plastic hooks, nails, Wl~ 2~1 ~P~ 313~/q)Ol~l wires9 screws or the like.
The fixing IlleallS lS shown in Fig. lA and lB are made of concrete reinforce-ment pins, which are fixed to ~he corlcrete reinforcerllents of the actual concrete 5 rein~orcement structure.
Tbe anode 20 is placed in the concreting of the framework 11, or ~he anode ~0 is mechanically ~ed e.g. with metallic or plastic na.ils, screws, anchors~ lists or the like to the framework 11.
The anode 20 is located on the opposite side relative to the fixing means 15 of the ~amework 11.
The anode 20 is a net, wire, strip, rod, plate or the like.
The material used in the anode 20 is a composite material, e.g. an alloy-me~al coated titan, magnetite, platinated titan or an iron ~xture, e.g. ferrosilicon or graphite or a noble metal, e.g. platinum or a conductive plastic.
20 ~s described above~ the anode element 10 can either be comprised of the material of the anode 20 or of the material of the anode 20 and another materialjoined thereto. Several anode elements 10 fonn a system, by means o~ which the steel parts of the concrete structure can be cathodically protected. Electricity is supplied to the ;~node element 20 e.g. via a conductor 30. The electricity is 25 supplied separately to each anode elernent 20 via one or more of its points or to all anode elements 20 of the systern together or by means of some combina~ion of the two separate a~ove-mentioned systems.
The framework 11 of the anode elemen~ is ananged in a wedge~like form such 30 that the width of the crosspiece of the ~amework ll is on the side of the anode 20 greater than on the side of the fL~ing means 15, whereby the concrete can during the casting easily flow also inside the frarnework.
~0 gl/~9~9 ~ J~ 3 1 s In accordance w~th Fig. 2, the anocle elerneIlt 1û is ~ixed to ~he steel parts S0 of the concrete reinfQrcement structure so that ~he fixing means 15 of the anode elemerlt 10 are fLxed to the steel parts 50. ~he anode element 10 is fit~ed between the outermost concrete reinforcement layer and ~he concreting wood S liIling 6Qs into which the concrete 70 is cast.
As shown in :Fig. 2, the anodes 20 of the anode element 10 are located on the other side of the framework 11 relative to the steel parts 50, whereby the anode20 cannot come into contact with the steel parts S0.
The invention has above been described only with reference to an example of its preferred ernbodiment. However, the intention is in no way to lirnit the ir,~ ntion to this example, but many changes and modi~lcations are possible within the inventive idea defined in the following patent claims.
A method for fixing an electrode arrangement ~o be used in the cathodic protection of concrete s~ructures and a fix~ng elemel1t The invention relates to a method for ~ixing an electrode a~rangem nt to be usedin the cathodic protection of concrete structures.
10 Tile invention also relates to a fixing element of an electrode arrangement to be used in the cathodic protection of concrete structures.
In the protection of steel parts of concrete structures, e.g. concrete reinforce-ments, the anodes of an electrode arrangement are generally fixed to an existing15 concrete surface, and the anode is covered with shotcrete or with another corresponding conductive material. However, problerns have been caused by the poor fixability of the electrode arrangement during the casting. Additional problems have also been caused by the fact that the anode is during the casting bent into contact with the steel constructions to be protected.
The above-mentioned situtations have made it considerably more difficult and slower to carry out the actual concrete casting.
The object of the present invention is to provide such an anode fixing arrange-2~ rnent and method, which, when used, eliminates the above-mentioned problem situations.
Another object of the invention is to provide such a fixing arrangement, which well adapts itself to be used in continuos concreting applications.
For reaching the objects mentloned above and to be presented below, the inventive method is mainly characterized in that the anode is mounted in a framework and that the framework with its anodes is mounted on the concrete w~ 9 P~r~
7 (~ ~
structure at a production plant or in the mo1lnting s~ep before the concreting step~
The inventive fixing element is mainly charac~erized in that the fix~ng element is S comprised o~ an anode and a frarnework, which framework is provided with means for ~ing the element to the concrete structure.
Such an inventive anode element placed in position ~efore the concreting is in certain cases ~he only techn~cally sensible solution. When, for example, protecting 10 underwater concrete stmctures, a considerable ad~antage is obtained in the preparation step, when the anode arrangement is of an element-stmctional type.
When using the inventive anode fixing arrangernent, the pressing effect of the additional mass caused by shotcreting is avoided. Furthermore, the number of 15 the work phases needed decreases, since the anode element is prefabricated, and only the fixing of the anode element has to be perforrned in connection with concreting.
The fixing of the inventive element is easy and it saves mounting time, since a 20 separate fixing and insulating work o~ the anode in the mounting step is elirnin-ated.
The inventive element remains fixed on the concrete structures, whereby no special precautionaly measures are needed in the concreting step, e.g. it is not25 necessary to use a slower concreting ra.te.
The construction of the anode elernent according to the invention is mechanical-ly rigid such that it cannot come into an electrical contact with the concrete reinforcements to be protect~d. From the point of view of the operaticn of ~he 30 protection, the avoidance of the electrical contact is one of the ~asic prerequi-sites. In addi~ion, the inventive anode elemen~ cannot move during the concret-ing owing to its fixing means.
W~ 9~ FY~
When using the inventive element, the unirltermptibility of a cath(l(lic contact is also ensured, since the cosmection of all concrete reinforcernent layers to the cathode circ~lit can be ~uaranteed by means of several fia~in~ points.
5 The anode element according to the invention forms a system of several elemen~s such that each element can, when so desired, be eontrolled as a sepa-rate electric circuit. The operation of the anode system is ehereby ensur d.
The invention is next described in more detail with reference to the figures of 10 the accompanying drawing, to which the invention is, however, in no way narrowly limited.
Fig. lA and lB show schematically an inventive anode element.
15 Fig. 2 shows as a schematic partial view an inventive anode element -fixed to a concrete structure.
An inventive anode element 10 showrl in Fig. lA and lB comprises a Framework 11, anodes 20 and fixing rneans 15. The framework 11 is made of an electrically 20 insulating material, e.g. of plastics or ceramics or of an electrolytically conductive material~ e.g. of concrete, plastics or ceramics. When so desired, a steel reinfor-cement OI` some other reinforcement is used for improving the strength prop-erties of the framework 11, which is, however, not necessary.
25 In one preferred embodirment of the invention, the framework 11 of the anode element 10 is made of concrete, since a good adherence to the concreting is ehenobtained. Furthermore, when ehe framework 11 is made of concrete, possible detrimental heat expansion phenomena are eliminated.
.
30 The ànode elernent 10 is fixed to a concrete surface, to concrete reinforcements or to other fixed parts of ~he construction or to parts usecl during the moun~ing with the fixing means 15 of ~he framework 11, e.~. ~vieh plastic hooks, nails, Wl~ 2~1 ~P~ 313~/q)Ol~l wires9 screws or the like.
The fixing IlleallS lS shown in Fig. lA and lB are made of concrete reinforce-ment pins, which are fixed to ~he corlcrete reinforcerllents of the actual concrete 5 rein~orcement structure.
Tbe anode 20 is placed in the concreting of the framework 11, or ~he anode ~0 is mechanically ~ed e.g. with metallic or plastic na.ils, screws, anchors~ lists or the like to the framework 11.
The anode 20 is located on the opposite side relative to the fixing means 15 of the ~amework 11.
The anode 20 is a net, wire, strip, rod, plate or the like.
The material used in the anode 20 is a composite material, e.g. an alloy-me~al coated titan, magnetite, platinated titan or an iron ~xture, e.g. ferrosilicon or graphite or a noble metal, e.g. platinum or a conductive plastic.
20 ~s described above~ the anode element 10 can either be comprised of the material of the anode 20 or of the material of the anode 20 and another materialjoined thereto. Several anode elements 10 fonn a system, by means o~ which the steel parts of the concrete structure can be cathodically protected. Electricity is supplied to the ;~node element 20 e.g. via a conductor 30. The electricity is 25 supplied separately to each anode elernent 20 via one or more of its points or to all anode elements 20 of the systern together or by means of some combina~ion of the two separate a~ove-mentioned systems.
The framework 11 of the anode elemen~ is ananged in a wedge~like form such 30 that the width of the crosspiece of the ~amework ll is on the side of the anode 20 greater than on the side of the fL~ing means 15, whereby the concrete can during the casting easily flow also inside the frarnework.
~0 gl/~9~9 ~ J~ 3 1 s In accordance w~th Fig. 2, the anocle elerneIlt 1û is ~ixed to ~he steel parts S0 of the concrete reinfQrcement structure so that ~he fixing means 15 of the anode elemerlt 10 are fLxed to the steel parts 50. ~he anode element 10 is fit~ed between the outermost concrete reinforcement layer and ~he concreting wood S liIling 6Qs into which the concrete 70 is cast.
As shown in :Fig. 2, the anodes 20 of the anode element 10 are located on the other side of the framework 11 relative to the steel parts 50, whereby the anode20 cannot come into contact with the steel parts S0.
The invention has above been described only with reference to an example of its preferred ernbodiment. However, the intention is in no way to lirnit the ir,~ ntion to this example, but many changes and modi~lcations are possible within the inventive idea defined in the following patent claims.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures, characterized in that an anode (20) is mounted in a framework (11) and that the framework with its anodes is mounted on the concrete structure at a production plant or in the mounting step before the concreting step.
2. A fixing element of an electrode arrangement to be used in the cathodic protection of concrete structures, characterized in that the fixing element (10) is comprised of an anode (20) and a framework (11), which framework (11) is provided with means (15) for fixing the element (10) to the concrete structure.
3. A fixing element according to Claim 29 characterized in that the framework (11) is made of concrete.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI903119A FI87241C (en) | 1990-06-20 | 1990-06-20 | Method of attaching an electrode arrangement used for cathodic protection of concrete structures and fasteners |
| FI903119 | 1990-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2064701A1 true CA2064701A1 (en) | 1991-12-21 |
Family
ID=8530672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002064701A Abandoned CA2064701A1 (en) | 1990-06-20 | 1991-06-19 | Method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0487675B1 (en) |
| JP (1) | JP3184215B2 (en) |
| AT (1) | ATE157711T1 (en) |
| AU (1) | AU637246B2 (en) |
| CA (1) | CA2064701A1 (en) |
| DE (1) | DE69127529T2 (en) |
| DK (1) | DK0487675T3 (en) |
| FI (1) | FI87241C (en) |
| NO (1) | NO305996B1 (en) |
| WO (1) | WO1991019829A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2075780C (en) * | 1991-09-23 | 2002-07-30 | Michele Tettamanti | Anode structure for cathodic protection of steel-reinforced concrete and relevant method of use |
| IT1254287B (en) * | 1992-03-13 | 1995-09-14 | Italcementi Spa | CEMENTITIOUS SUPPORT MATERIAL FOR THE CATHODIC PROTECTION OF REINFORCED CONCRETE STRUCTURES |
| JP5918640B2 (en) * | 2012-06-26 | 2016-05-18 | 住友大阪セメント株式会社 | Cathodic protection method |
| CN112681345A (en) * | 2020-12-04 | 2021-04-20 | 中交第一航务工程局有限公司 | Installation process of prefabricated block for framework slope protection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62503040A (en) * | 1985-05-07 | 1987-12-03 | エルテック・システムズ・コ−ポレ−ション | Cathodic protection system for steel reinforced concrete structures and its installation method |
| EP0262835A1 (en) * | 1986-09-16 | 1988-04-06 | RAYCHEM CORPORATION (a California corporation) | Mesh electrodes and clips for use in preparing them |
| US5183694A (en) * | 1988-04-19 | 1993-02-02 | Webb Michael G | Inhibiting corrosion in reinforced concrete |
| DE3826926A1 (en) * | 1988-08-09 | 1990-02-15 | Heraeus Elektroden | ANODE FOR CATHODIC CORROSION PROTECTION |
-
1990
- 1990-06-20 FI FI903119A patent/FI87241C/en active IP Right Grant
-
1991
- 1991-06-19 AT AT91910909T patent/ATE157711T1/en not_active IP Right Cessation
- 1991-06-19 DK DK91910909.0T patent/DK0487675T3/en active
- 1991-06-19 WO PCT/FI1991/000191 patent/WO1991019829A1/en active IP Right Grant
- 1991-06-19 CA CA002064701A patent/CA2064701A1/en not_active Abandoned
- 1991-06-19 EP EP91910909A patent/EP0487675B1/en not_active Expired - Lifetime
- 1991-06-19 JP JP51072391A patent/JP3184215B2/en not_active Expired - Fee Related
- 1991-06-19 DE DE69127529T patent/DE69127529T2/en not_active Expired - Fee Related
- 1991-06-19 AU AU80806/91A patent/AU637246B2/en not_active Expired
-
1992
- 1992-02-18 NO NO920638A patent/NO305996B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO920638L (en) | 1992-02-18 |
| JPH05500834A (en) | 1993-02-18 |
| JP3184215B2 (en) | 2001-07-09 |
| ATE157711T1 (en) | 1997-09-15 |
| WO1991019829A1 (en) | 1991-12-26 |
| AU8080691A (en) | 1992-01-07 |
| EP0487675A1 (en) | 1992-06-03 |
| DE69127529D1 (en) | 1997-10-09 |
| FI903119A (en) | 1991-12-21 |
| AU637246B2 (en) | 1993-05-20 |
| FI87241C (en) | 1992-12-10 |
| FI87241B (en) | 1992-08-31 |
| FI903119A0 (en) | 1990-06-20 |
| DK0487675T3 (en) | 1998-04-20 |
| NO305996B1 (en) | 1999-08-30 |
| NO920638D0 (en) | 1992-02-18 |
| DE69127529T2 (en) | 1998-02-26 |
| EP0487675B1 (en) | 1997-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |