EP0487675B1 - A method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element - Google Patents
A method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element Download PDFInfo
- Publication number
- EP0487675B1 EP0487675B1 EP91910909A EP91910909A EP0487675B1 EP 0487675 B1 EP0487675 B1 EP 0487675B1 EP 91910909 A EP91910909 A EP 91910909A EP 91910909 A EP91910909 A EP 91910909A EP 0487675 B1 EP0487675 B1 EP 0487675B1
- Authority
- EP
- European Patent Office
- 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.)
- Expired - Lifetime
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 39
- 238000004210 cathodic protection Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
Definitions
- the invention relates to a method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures.
- the invention also relates to a fixing element of an electrode arrangement to be used in the cathodic protection of concrete structures.
- the anodes of an electrode arrangement are generally fixed to an existing concrete surface, and the anode is covered with shotcrete or with another corresponding conductive material.
- problems 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.
- Document EP-A-0 262 835 discloses a fixing element of an electrode arrangement to be used in the cathodic protection of concrete structures, comprising an anode arranged in a planar manner.
- the planar-shaped anode is made of a mesh formed by electrodes and is intended to be layed out on the surface of a concrete structure after the concreting step.
- Document DE-A-3 826 926 discloses a precast anode arrangement having an electron-conductive core and an ion-conductive coating made of mortar in order to prevent shortcircuits between the anode and the enforcement.
- the anode arrangement is adapted to be fixed to the reinforcement structure prior to the concreting step.
- Such an inventive anode element placed in position before the concreting is in certain cases the only technically sensible solution.
- a considerable advantage is obtained in the preparation step, when the anode arrangement is of an element-structional type.
- the pressing effect of the additional mass caused by shotcreting is avoided. Furthermore, the number of the work phases needed decreases, since the anode element is prefabricated, and only the fixing of the anode element has to be performed in connection with concreting.
- the fixing of the inventive element is easy and it saves mounting time, since a separate fixing and insulating work of the anode in the mounting step is eliminated.
- the inventive element remains fixed on the concrete structures, whereby no special precautionary measures are needed in the concreting step, e.g. it is not necessary to use a slower concreting rate.
- the construction of the anode element according to the invention is mechanically rigid such that it cannot come into an electrical contact with the concrete reinforcements to be protected. From the point of view of the operation of the protection, the avoidance of the electrical contact is one of the basic prerequisites. In addition, the inventive anode element cannot move during the concreting owing to its fixing means.
- the uninterruptibility of a cathodic contact is also ensured, since the connection of all concrete reinforcement layers to the cathode circuit can be guaranteed by means of several fixing points.
- the anode element according to the invention forms a system of several elements such that each element can, when so desired, be controlled as a separate electric circuit. The operation of the anode system is thereby ensured.
- Fig. 1A and 1B show schematically an inventive anode element.
- Fig. 2 shows as a schematic partial view an inventive anode element fixed to a concrete structure.
- An inventive anode element 10 shown in Fig. 1A and 1B comprises a framework 11, anodes 20 and fixing means 15.
- the framework 11 is made of an electrically insulating material, e.g. of plastics or ceramics or of an electrolytically conductive material, e.g. of concrete, plastics or ceramics.
- an electrically insulating material e.g. of plastics or ceramics or of an electrolytically conductive material, e.g. of concrete, plastics or ceramics.
- a steel reinforcement or some other reinforcement is used for improving the strength properties of the framework 11, which is, however, not necessary.
- the framework 11 of the anode element 10 is made of concrete, since a good adherence to the concreting is then obtained. Furthermore, when the framework 11 is made of concrete, possible detrimental heat expansion phenomena are eliminated.
- the anode element 10 is fixed to a concrete surface, to concrete reinforcements or to other fixed parts of the construction or to parts used during the mounting with the fixing means 15 of the framework 11, e.g. with plastic hooks, nails, wires, screws or the like.
- the fixing means 15 shown in Fig. 1A and 1B are made of concrete reinforcement pins, which are fixed to the concrete reinforcements of the actual concrete reinforcement structure.
- the anode 20 is placed in the concreting of the framework 11, or the anode 20 is mechanically fixed e.g. with metallic or plastic nails, 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 framework 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-metal coated titan, magnetite, platinated titan or an iron mixture, e.g. ferrosilicon or graphite or a noble metal, e.g. platinum or a conductive plastic.
- a composite material e.g. an alloy-metal coated titan, magnetite, platinated titan or an iron mixture, e.g. ferrosilicon or graphite or a noble metal, e.g. platinum or a conductive plastic.
- 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 material joined thereto.
- Several anode elements 10 form a system, by means of which the steel parts of the concrete structure can be cathodically protected. Electricity is supplied to the anode element 20 e.g. via a conductor 30. The electricity is supplied separately to each anode element 20 via one or more of its points or to all anode elements 20 of the system together or by means of some combination of the two separate above-mentioned systems.
- the framework 11 of the anode element is arranged in a wedge-like form such that the width of the crosspiece of the framework 11 is on the side of the anode 20 greater than on the side of the fixing means 15, whereby the concrete can during the casting easily flow also inside the framework.
- the anode element 10 is fixed to the steel parts 50 of the concrete reinforcement structure so that the fixing means 15 of the anode element 10 are fixed to the steel parts 50.
- the anode element 10 is fitted between the outermost concrete reinforcement layer and the concreting wood lining 60, into which the concrete 70 is cast.
- 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 anode 20 cannot come into contact with the steel parts 50.
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)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI903119A FI87241C (fi) | 1990-06-20 | 1990-06-20 | Foerfarande foer att faesta ett elektrodarrangemang som anvaends vid katodisk skydd av betongkonstruktioner samt faestelement |
FI903119 | 1990-06-20 | ||
PCT/FI1991/000191 WO1991019829A1 (en) | 1990-06-20 | 1991-06-19 | A method for fixing an electrode arrangement to be used in the cathodic protection of concrete structures and a fixing element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0487675A1 EP0487675A1 (en) | 1992-06-03 |
EP0487675B1 true EP0487675B1 (en) | 1997-09-03 |
Family
ID=8530672
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91910909A Expired - Lifetime EP0487675B1 (en) | 1990-06-20 | 1991-06-19 | A 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 (no) |
JP (1) | JP3184215B2 (no) |
AT (1) | ATE157711T1 (no) |
AU (1) | AU637246B2 (no) |
CA (1) | CA2064701A1 (no) |
DE (1) | DE69127529T2 (no) |
DK (1) | DK0487675T3 (no) |
FI (1) | FI87241C (no) |
NO (1) | NO305996B1 (no) |
WO (1) | WO1991019829A1 (no) |
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 (it) * | 1992-03-13 | 1995-09-14 | Italcementi Spa | Materiale cementizio di supporto per la protezione catodica di strutture in cemento armato |
JP5918640B2 (ja) * | 2012-06-26 | 2016-05-18 | 住友大阪セメント株式会社 | 電気防食工法 |
CN112681345A (zh) * | 2020-12-04 | 2021-04-20 | 中交第一航务工程局有限公司 | 一种骨架护坡预制块安装工艺 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 (de) * | 1988-08-09 | 1990-02-15 | Heraeus Elektroden | Anode fuer kathodischen korrosionsschutz |
-
1990
- 1990-06-20 FI FI903119A patent/FI87241C/fi active IP Right Grant
-
1991
- 1991-06-19 JP JP51072391A patent/JP3184215B2/ja not_active Expired - Fee Related
- 1991-06-19 CA CA002064701A patent/CA2064701A1/en not_active Abandoned
- 1991-06-19 DK DK91910909.0T patent/DK0487675T3/da active
- 1991-06-19 AT AT91910909T patent/ATE157711T1/de not_active IP Right Cessation
- 1991-06-19 AU AU80806/91A patent/AU637246B2/en not_active Expired
- 1991-06-19 EP EP91910909A patent/EP0487675B1/en not_active Expired - Lifetime
- 1991-06-19 DE DE69127529T patent/DE69127529T2/de not_active Expired - Fee Related
- 1991-06-19 WO PCT/FI1991/000191 patent/WO1991019829A1/en active IP Right Grant
-
1992
- 1992-02-18 NO NO920638A patent/NO305996B1/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU8080691A (en) | 1992-01-07 |
NO920638D0 (no) | 1992-02-18 |
ATE157711T1 (de) | 1997-09-15 |
CA2064701A1 (en) | 1991-12-21 |
FI87241B (fi) | 1992-08-31 |
WO1991019829A1 (en) | 1991-12-26 |
FI903119A0 (fi) | 1990-06-20 |
DK0487675T3 (da) | 1998-04-20 |
DE69127529D1 (de) | 1997-10-09 |
JP3184215B2 (ja) | 2001-07-09 |
NO920638L (no) | 1992-02-18 |
DE69127529T2 (de) | 1998-02-26 |
FI903119A (fi) | 1991-12-21 |
FI87241C (fi) | 1992-12-10 |
NO305996B1 (no) | 1999-08-30 |
JPH05500834A (ja) | 1993-02-18 |
EP0487675A1 (en) | 1992-06-03 |
AU637246B2 (en) | 1993-05-20 |
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