EP0380602A1 - Anode für kathodischen korrosionsschutz - Google Patents
Anode für kathodischen korrosionsschutzInfo
- Publication number
- EP0380602A1 EP0380602A1 EP89906356A EP89906356A EP0380602A1 EP 0380602 A1 EP0380602 A1 EP 0380602A1 EP 89906356 A EP89906356 A EP 89906356A EP 89906356 A EP89906356 A EP 89906356A EP 0380602 A1 EP0380602 A1 EP 0380602A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- concrete
- core
- ion
- anode according
- 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.)
- Pending
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 11
- 238000005260 corrosion Methods 0.000 title claims abstract description 11
- 238000004210 cathodic protection Methods 0.000 title abstract 2
- 239000004567 concrete Substances 0.000 claims abstract description 36
- 230000002787 reinforcement Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 230000004913 activation Effects 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 238000009415 formwork Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 5
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000010405 anode material Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
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 of valve metal with an activation layer covering it, and to the use thereof 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, a uniform current distribution with sufficient redundancy being achievable by means of a diamond-shaped mesh pattern and a current density for long-term operation of 100 mA / m 2 being achievable by means of 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 are said to be usable 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 in 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.
- conductors made of titanium or titanium alloy are led out. 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; Furthermore, it is possible to use the anode according to the invention as a basic element for producing a prefabricated concrete part.
- the economical use of activated titanium expanded metal has proven to be particularly advantageous, with the narrow, elongated shape of the anode making it possible to protect columns, trusses, stairs but also walls or levels made of concrete 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.
- the concrete located below the expanded metal lattice is designated with reference number 3 'in the broken area of the casing 3, while the concrete located above the expanded metal lattice 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 hardening 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, mutually parallel reinforcing bars 11, the ion-conducting jacket 3 touching the reinforcing bars preventing any risk of short-circuiting between the reinforcing bars 11 and the expanded metal grid 2.
- several such anodes can also be used in a reinforcement box. This is then filled with in-situ concrete, 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-in 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 in that both the front wall and the rear wall of the hitherto customary formwork are replaced by plate-shaped anodes or by 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)
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 (1)
| Publication Number | Publication Date |
|---|---|
| EP0380602A1 true EP0380602A1 (de) | 1990-08-08 |
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 After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89201485A Expired - Lifetime EP0357094B1 (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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152508A (zh) * | 2021-05-08 | 2021-07-23 | 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 |
Families Citing this family (25)
| 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 |
Family Cites Families (9)
| 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 |
-
1988
- 1988-08-09 DE DE3826926A patent/DE3826926A1/de not_active Withdrawn
-
1989
- 1989-05-30 EP EP89906356A patent/EP0380602A1/de active Pending
- 1989-05-30 WO PCT/EP1989/000599 patent/WO1990001570A1/de not_active Application Discontinuation
- 1989-05-30 DE DE8989201485T patent/DE58902035D1/de not_active Expired - Lifetime
- 1989-05-30 AT AT89201485T patent/ATE79420T1/de not_active IP Right Cessation
- 1989-05-30 ES ES198989201485T patent/ES2034589T3/es not_active Expired - Lifetime
- 1989-05-30 EP EP89201485A patent/EP0357094B1/de not_active Expired - Lifetime
-
1992
- 1992-11-12 GR GR920402562T patent/GR3006226T3/el unknown
-
1995
- 1995-05-31 US US08/454,622 patent/US5609748A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9001570A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152508A (zh) * | 2021-05-08 | 2021-07-23 | 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 |
| 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 |
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 |
| EP0357094B1 (de) | 1992-08-12 |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 19900411 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
| XX | Miscellaneous (additional remarks) |
Free format text: VERFAHREN ABGESCHLOSSEN INFOLGE VERBINDUNG MIT 89201485.3/0357094 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) VOM 07.02.92. |