US3616418A - Anode assembly for cathodic protection systems - Google Patents
Anode assembly for cathodic protection systems Download PDFInfo
- Publication number
- US3616418A US3616418A US882127A US3616418DA US3616418A US 3616418 A US3616418 A US 3616418A US 882127 A US882127 A US 882127A US 3616418D A US3616418D A US 3616418DA US 3616418 A US3616418 A US 3616418A
- Authority
- US
- United States
- Prior art keywords
- anode
- cable
- elongated
- spaced
- cathodic protection
- 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
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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
Definitions
- Kovalich ABSTRACT An anode assembly for cathodic protection systems, especially for the cathodic protection of submerged spaced supporting legs of offshore platforms, comprising an elongated carrier cable adapted for spanning the spaced submerged legs of the platform and carrying an elongated anode along the length of the cable intermediate the ends thereof, the anode being spaced from the connecting ends of the cable to provide for substantially uniform current distribution to the platform legs.
- anode mounted on a structure to be cathodically protected generally requires that the anode be insulated from he structure by a dielectric shield around the anode location in order to achieve proper current distribution to the structure being cathodically protected. Without an adequate dielectric shield area around the anode, the current distribution on the cathode surface is not uniform because the resistance through the electrolyte varies considerably from he anode location to the more remote areas of the structure being protected.
- the present invention contemplates the provision of an active anode remotely positioned from the surfaces being cathodically protected with the elimination of any need for a dielectric shield on the surfaces being protected.
- the invention deals with an anode for cathodic protection systems, especially for the cathodic protection of submerged spaced supporting legs of offshore platforms, comprising an elongated carrier cable adapted for spanning the spaced submerged legs, an elongated electrical conductor positioned adjacent to and along the length of the cable, an electrically conductive clamp means clamping the carrier cable and the electrical conductor in parallel spaced relationship and in electrical contact with the electrical conductor, the cable, conductor and clamp means being embedded in an elongated mass of insulation material, an electrically conductive member, e.g. a nipple, extending from the clamp through the insulation material, and an elongated anode, e.g. a wire, mounted on the external surface of the insulation material along the length thereof and electrically connected to the electrically conductive member.
- an electrically conductive member e.g. a nipple
- FIG. 3 illustrates a cross-sectional view along lines 3-3 of FIG. 2
- FIG. 4 illustrates a partly elevational and partly brokenaway side view of a clamp according to the invention including a carrier cable and electrical conductor clamped therein.
- FIG. I is an exaggerated schematic view of an offshore platform I carrying on its upper surface working structures such as derrick 2 and housing 3.
- the platform I is supported above the ocean surface 4 by a plurality of spaced metal legs of which legs 5 and 6 are shown rising upwardly from the ocean floor 7.
- the legs, e.g. legs 5 and 6, are cathodically protected by means of the anode assembly of the invention generally designated as 8 and which comprises an elongated carrier cable 9 spanning the spaced submerged legs and connected to connectors such as eyebolts l0 and 11 each mounted on a submerged leg.
- the carrier cable carries an electrical conductor 12 which leads to the cathodic protection power system (not shown) on the platform.
- the cable also carries elongated anodes I3 and I4 such as wire anodes, along the length of the cable intermediate the ends thereof, the anode being spaced from the connecting ends of the carrier cable to provide for substantially uniform current distribution to the platform legs.
- FIGS. 2 to 4 show the particular anode assembly according to the invention, which comprises the elongated carrier cable 9 adapted for spanning the spaced submerged legs of an offshore platform, or other structures supported by spacedapart submerged metal legs.
- the assembly further comprises an insulated electrical conductor I2 positioned adjacent to and lengthwise of the cable.
- the cable 9 and conductor I2 are clamped together in parallel spaced relationship by means of an electrically conductive clamp means generally designated by the numeral IS.
- the clamp for purpose of illustration, is shown as of rectangular configuration, but it may also be of substantially cylindrical configuration.
- one or more elongated anodes I3 and I4 are mounted on and lengthwise of the surface of the elongated insulation mass 3], e.g. a cylindrical mass.
- the elongated insulation mass 3 e.g. a cylindrical mass.
- the anodes are positioned in electrical contact with the exposed ends 34 of the nipples 26 and secured thereto bolts 37 as illustrated by FIGS. effective securing means may be employed.
- the anode wires are composed of a titanium, niobium or tantalum wire having spaced platinum sleeves 38 mounted thereon along the length thereof.
- a plurality of retaining rings 39 of insulation resin material are mounted along the length of the insulation mass 31 to retain the anode against the surface of the mass or cylinder 31.
- a tubing 40 of the same material is advantageously used to retain the end portions of the anode.
- An anode assembly for cathodic protection systems comprising an elongated carrier cable having opposite ends, an elongated electrical conductor positioned adjacent to and along the length of the cable, the cable and conductor being embedded in an elongated mass of insulation material along a portion thereof intermediate the opposite ends of the cable, an electrically conductive means in electrical contact with the electrical conductor and extending through the elongated mass of insulation material, the electrically conductive means comprising an electrically conductive clamp embedded in said insulation material and clamping the cable and the electrical conductor in parallel spaced relationship, and an elongated anode mounted on the external surface of the insulation material along the length thereof and electrically connected to the electrically conductive member.
- said electrically conductive clamp comprises an electrically conductive nipple extending through the insulation material.
Abstract
Description
Claims (3)
- 2. An anode assembly according to claim 1, wherein said electrically conductive clamp comprises an electrically conductive nipple extending Through the insulation material.
- 3. An anode assembly according to claim 1, wherein the elongated anode is a wire anode composed of titanium, niobium or tantalum having spaced platinum sleeves mounted thereon along the length thereof.
- 4. An anode assembly according to claim 1, wherein opposite portions of the cable from the ends of the anode to the ends of the cable are at least as long as the length of the anode.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88212769A | 1969-12-04 | 1969-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3616418A true US3616418A (en) | 1971-10-26 |
Family
ID=25379944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US882127A Expired - Lifetime US3616418A (en) | 1969-12-04 | 1969-12-04 | Anode assembly for cathodic protection systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US3616418A (en) |
JP (1) | JPS5023656B1 (en) |
GB (1) | GB1299989A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3769521A (en) * | 1972-10-05 | 1973-10-30 | Exxon Production Research Co | Impressed current cathodic protection system |
US4175021A (en) * | 1978-03-06 | 1979-11-20 | C. E. Equipment Co., Inc. | Apparatus for preventing end effect in anodes |
US4201637A (en) * | 1978-11-15 | 1980-05-06 | Conoco, Inc. | Sacrificial anode apparatus |
US4267029A (en) * | 1980-01-07 | 1981-05-12 | Pennwalt Corporation | Anode for high resistivity cathodic protection systems |
US4292149A (en) * | 1979-01-19 | 1981-09-29 | Imi Marston Limited | Current rope anodes |
US4401540A (en) * | 1980-10-29 | 1983-08-30 | C.E. Equipment Co., Inc. | Apparatus for reducing end effect in anodes |
US4407711A (en) * | 1979-11-02 | 1983-10-04 | Texas Instruments Incorporated | Corrosion protection system for hot water tanks |
WO1983003849A1 (en) * | 1982-04-28 | 1983-11-10 | Gould Inc. | Method and means for generating electrical and magnetic fields in salt water environments |
US4452683A (en) * | 1982-01-21 | 1984-06-05 | Oronzio De Nora | Anodic structure for cathodic protection |
US4452539A (en) * | 1981-10-26 | 1984-06-05 | Varel Manufacturing Company | Bearing seal for rotating cutter drill bit |
US4526666A (en) * | 1983-06-23 | 1985-07-02 | Oronzio De Nora | Method for electrically connecting non corrodible anodes to the corrodible core of a power supply cable |
US4544465A (en) * | 1983-10-26 | 1985-10-01 | Union Oil Company Of California | Galvanic anodes for submergible ferrous metal structures |
US4544464A (en) * | 1983-12-23 | 1985-10-01 | Oronzio De Nora S.A. | Ground anode prepacked with backfill in a flexible structure for cathode protection with impressed currents |
US4582582A (en) * | 1983-04-22 | 1986-04-15 | Gould Inc. | Method and means for generating electrical and magnetic fields in salt water environment |
US4609307A (en) * | 1984-11-05 | 1986-09-02 | Exxon Production Research Co. | Anode pod system for offshore structures and method of installation |
US4624329A (en) * | 1984-02-15 | 1986-11-25 | Varel Manufacturing Company | Rotating cutter drill set |
US4627891A (en) * | 1983-04-22 | 1986-12-09 | Gould Inc. | Method of generating electrical and magnetic fields in salt water marine environments |
US6461082B1 (en) * | 2000-08-22 | 2002-10-08 | Exxonmobil Upstream Research Company | Anode system and method for offshore cathodic protection |
US20150329975A1 (en) * | 2013-01-10 | 2015-11-19 | Matcor, Inc. | Break-resistant anode assemblies for cathodic protection systems and methods of installing the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1206747B (en) * | 1986-03-10 | 1989-05-03 | Oronzio De Nora Sa | IMPRESSED CURRENT CATHODIC PROTECTION SYSTEM OF OIL PLATFORMS AT SEA. |
-
1969
- 1969-12-04 US US882127A patent/US3616418A/en not_active Expired - Lifetime
-
1970
- 1970-12-02 JP JP45105962A patent/JPS5023656B1/ja active Pending
- 1970-12-03 GB GB57549/70A patent/GB1299989A/en not_active Expired
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3769521A (en) * | 1972-10-05 | 1973-10-30 | Exxon Production Research Co | Impressed current cathodic protection system |
US4175021A (en) * | 1978-03-06 | 1979-11-20 | C. E. Equipment Co., Inc. | Apparatus for preventing end effect in anodes |
US4201637A (en) * | 1978-11-15 | 1980-05-06 | Conoco, Inc. | Sacrificial anode apparatus |
US4292149A (en) * | 1979-01-19 | 1981-09-29 | Imi Marston Limited | Current rope anodes |
US4407711A (en) * | 1979-11-02 | 1983-10-04 | Texas Instruments Incorporated | Corrosion protection system for hot water tanks |
US4267029A (en) * | 1980-01-07 | 1981-05-12 | Pennwalt Corporation | Anode for high resistivity cathodic protection systems |
US4401540A (en) * | 1980-10-29 | 1983-08-30 | C.E. Equipment Co., Inc. | Apparatus for reducing end effect in anodes |
US4452539A (en) * | 1981-10-26 | 1984-06-05 | Varel Manufacturing Company | Bearing seal for rotating cutter drill bit |
US4452683A (en) * | 1982-01-21 | 1984-06-05 | Oronzio De Nora | Anodic structure for cathodic protection |
US4519886A (en) * | 1982-01-21 | 1985-05-28 | Oronzio De Nora, S.A. | Method of making electrical connection to an anode |
WO1983003849A1 (en) * | 1982-04-28 | 1983-11-10 | Gould Inc. | Method and means for generating electrical and magnetic fields in salt water environments |
DE3342803T1 (en) * | 1982-04-28 | 1984-05-03 | Gould Inc. (n.d.Ges.d. Staates Delaware), 60008 Rolling Meadows, Ill. | Method and device for generating electric and magnetic fields in salt water environments |
US4627891A (en) * | 1983-04-22 | 1986-12-09 | Gould Inc. | Method of generating electrical and magnetic fields in salt water marine environments |
US4582582A (en) * | 1983-04-22 | 1986-04-15 | Gould Inc. | Method and means for generating electrical and magnetic fields in salt water environment |
US4526666A (en) * | 1983-06-23 | 1985-07-02 | Oronzio De Nora | Method for electrically connecting non corrodible anodes to the corrodible core of a power supply cable |
US4544465A (en) * | 1983-10-26 | 1985-10-01 | Union Oil Company Of California | Galvanic anodes for submergible ferrous metal structures |
US4544464A (en) * | 1983-12-23 | 1985-10-01 | Oronzio De Nora S.A. | Ground anode prepacked with backfill in a flexible structure for cathode protection with impressed currents |
US4624329A (en) * | 1984-02-15 | 1986-11-25 | Varel Manufacturing Company | Rotating cutter drill set |
US4609307A (en) * | 1984-11-05 | 1986-09-02 | Exxon Production Research Co. | Anode pod system for offshore structures and method of installation |
US6461082B1 (en) * | 2000-08-22 | 2002-10-08 | Exxonmobil Upstream Research Company | Anode system and method for offshore cathodic protection |
US20150329975A1 (en) * | 2013-01-10 | 2015-11-19 | Matcor, Inc. | Break-resistant anode assemblies for cathodic protection systems and methods of installing the same |
US10023964B2 (en) * | 2013-01-10 | 2018-07-17 | Matcor, Inc. | Break-resistant anode assemblies for cathodic protection systems and methods of installing the same |
US10865485B2 (en) | 2013-01-10 | 2020-12-15 | Matcor, Inc. | Break-resistant anode assemblies for cathodic protection systems and methods of installing the same |
Also Published As
Publication number | Publication date |
---|---|
GB1299989A (en) | 1972-12-13 |
JPS5023656B1 (en) | 1975-08-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ENGELHARD CORPORATION 70 WOOD AVENUE SOUTH, METRO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PHIBRO CORPORATION, A CORP. OF DE;REEL/FRAME:003968/0801 Effective date: 19810518 |
|
AS | Assignment |
Owner name: CHEMICAL BANK, 277 PARK AVENUE, NEW YORK, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:ELECTROCATALYTIC, INC., A NJ. CORP.;REEL/FRAME:004574/0053 Effective date: 19860611 |
|
AS | Assignment |
Owner name: ELECTROCATALYTIC INC., A NEW JERSEY CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ENGELHARD CORPORATION;REEL/FRAME:004621/0589 Effective date: 19860611 |
|
AS | Assignment |
Owner name: CHASE MANHATTAN BANK, THE, NEW YORK Free format text: SECURITY INTEREST;ASSIGNORS:ELECTROCATALYTIC, INC.;ELECTROCATALYTIC LIMITED;REEL/FRAME:006357/0328 Effective date: 19921120 |