US3022243A - Anode assembly for cathodic protection systems - Google Patents

Anode assembly for cathodic protection systems Download PDF

Info

Publication number
US3022243A
US3022243A US809565A US80956559A US3022243A US 3022243 A US3022243 A US 3022243A US 809565 A US809565 A US 809565A US 80956559 A US80956559 A US 80956559A US 3022243 A US3022243 A US 3022243A
Authority
US
United States
Prior art keywords
support
recess
anode
perforations
plate
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
Application number
US809565A
Other languages
English (en)
Inventor
Edward P Anderson
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.)
Engelhard Industries Inc
Original Assignee
Engelhard Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL127738D priority Critical patent/NL127738C/xx
Priority to BE590158D priority patent/BE590158A/xx
Priority to NL250897D priority patent/NL250897A/xx
Application filed by Engelhard Industries Inc filed Critical Engelhard Industries Inc
Priority to US809565A priority patent/US3022243A/en
Priority to FR823437A priority patent/FR1253098A/fr
Priority to DEE19267A priority patent/DE1209845B/de
Application granted granted Critical
Publication of US3022243A publication Critical patent/US3022243A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/31—Immersed structures, e.g. submarine structures

Definitions

  • cathodic protection systems in which direct current is supplied between the hull of the ship as a cathode and generally a number of anodes in contact with the surrounding water and lo- 'cated near the hull.
  • adodes are mounted in openings in the hull and electrical lead-in conductors are sealed through the hull openings by means of stuffing box assemblies, so that the protective current may be fed from a power supply inside the ship to the anodes.
  • the anode In cathodic protection systems, the anode is therefore the only element which is mounted on the outside of the ship and in contact with the water. Under the pre vailing severe circumstances, anodes must meet special requirements. Since they are subject to chemical attack by the electrolytic decomposition products of sea water, the surfaces must be corrosion resistant. precious metals are the appropriate material for the current-carrying anodic surfaces, and platinum or a platinum alloy is generally used. In practice, either thin foils of thicknesses in the range of about 0.005 to 0.010 inch or a base metal body covered with precious metal form the metallic portion of the anode structure.
  • anodes In addition to chemical attack, anodes are subject to mechanical damages. These include erosion by particles suspended in the water and metal fatigue due to continu- Therefore, a
  • the object of this invention is to provide an anode using a precious metal foil mounted in a plastic support in such a manner that it withstands the stress resulting from vibrations due to turbulence in the surrounding water or of any other origin.
  • an anode assembly for cathodic protection of ships includes a plate-shaped support, a disc of a precious metal foil in contact with one surface of the support and a cupshaped recess formed in the center of the disc.
  • the recess has a plurality of perforations therethrough and is imbedded in the support so that the plastic material fills the cup and continues through the perforations to form a bond with the remainder of the plastic support. Therefore, in accordance with an important feature of this invention, an anode assembly comprises a thin plate of corrosion resistant metal which has a substantially flat main portion and at least one area bent out of its plane to form a recess.
  • the recessed area has a plurality of perforations therethrough and is imbedded in an insulating support so that the recess is filled with plastic material which is bonded to the remainder of the support through the perforations.
  • the area of the metal plate surrounding the recess lies flat against the plastic support and may be retained in this position by imbedding a circumferential area, as described below.
  • such a cup-shaped recess is formed at the location, usually in the center of the plate, where connection to a power supply is made, e.g. by welding the bottom portion of the recess in the anode plate to a lead-in conductor extending therefrom and through the support. Since the recess is entirely imbedded, the weld is protected against vibrations or other mechanical or chemical influences so that failure of this connection is precluded.
  • the hull '6 of a ship has secured thereto an insulating plastic support 8 having essentially the shape of a mush room.
  • the support 8 includes a flat circular plate 10 and a cylindrical stem 12 attached to its centerj
  • a connector pin 14 is axially embedded through the stem 12 and the plate 10.
  • 'Iheside of the supp'ortplate 10 with the stem 12 thereon facesthe hull 6,-whi1e the opposite side carries a corrosion resistant'disc or thin'plate 16, generally a circular platinum sheet or a similar sheet of a platinum alloy.
  • Good results have been obtained when using an alloy of about percent by weight of platinum with about 20 percent by weight of palladium.
  • the thickness of the disc may be about 0.005 inch.
  • a comparatively narrow circumferential area 18 of the disc 16 is bent out of the plane of the disc and the rim so obtained is imbedded in the plate 10 of the support to provide a firm grip all around the circumference of the anode disc 16.
  • the disc 16 has one additional area bent out of its plane to form a cup-shaped recess with an annular wall 20 and a bottom 22.
  • the bottom portion 22 is welded to a flange 24 which, in turn, forms part of the connector pin 14.
  • the pin 14 provides electrical connection to the positive terminal of a power supply 26, suitably by means of a female connector 28.
  • the cup-shaped recess is filled with plastic material, preferably the same as that from which the support 8 is formed, suitably polytetrafluoroethylene, or any other similar material capable to form a bond with the material 7 of the support 8.
  • the perforations 25 through the wall portion permitbonding of the plastic material inside the recess with that outside the recess.
  • Therplastic'material in the recess is shown broken away in the drawing to facilitate illustration of the perforations 25. Since the perforations are radially arranged through the wall 20, the recessed area" is anchored in the support to as described above, in the hull, the latter is provided with bores and'compression seals or stufling boxes secured in the bores. An example of one suitable seal is illustrated in the drawing.
  • the seal includes a tubular sleeve with an outer thread which is welded into a bore through a the hull.
  • An annular jam nut 32 engagesthe threaded sleeve for compressing a packing 34. Thereby a tight seal between the stem 12 and the inner surface of the sleeve 30 is obtained.
  • the aperture through the jam nut 32 leaves sufficient clearance for the protruding connector pin 14 and the female connector 28 engaging its end portion.
  • the seal described may be re- 7 placed by any other suitable structure such as the assembly disclosed in co-pending application Serial No. 682,- 336, filed September 6, 1957, of Arthur J. Zwanzig.
  • An automatically adjusted power supply which may be used is set forth in co-pending application Serial No. 732,275, filed May 1, 1958, of Eugene M. Fry.
  • the anode assembly has. been described above as including one single, centrally arranged perforated recess, of which the bottom portion 22 is connected to the pin 14. While good results are obtained with thisr arrangea ment, in the case of larger anode discs a plurality of I recesses may be provided in any desired configuration, for example in circular or in radial arrangements. Rectangular anode foils may also be secured to a support by such arrangements.
  • An anode assembly comprising a substantially plateshaped insulating plastic support, a circular thin plate of corrosion resistant metal serving as the anode and having one surface in contact with one circular surface of said support, a circumferential area and a central circular area'of said thin metal plate being bent out. of the plane of the plate to form a rim and a cup-shaped recess,
  • said recess having a bottom portion and a substantially annular side wall, a plurality of perforations through said side wall, said recess and said rim being imbedded in the insulating support, the recess being filled with plastic material, which filling material forms a bond with the remainder of the support through said perforations, electrical connecting means secured to the bottom portion of the cup-shaped recess and extending through the insulating support to protrude therefrom at the other surface.
  • An anode assembly comprising an insulating plastic support, a corrosion resistant metal'sheet serving as the anode mounted on said support and'in contact therewith,
  • the sheet having a circumferential area and at least one portion of its inner area bent out of its plane, the circumferential area forming a rim and the inner area forming a cup-shaped recess, the recess having at least one perforation therethrough, and both the rim and the recess being imbedded in the insulating support, the recess being filled with plastic material, which filling material forms a bond with the remainder of the support through said perforation.
  • anode assembly including a substantially mushroom-shaped insulating plastic support having a fiat portion and a cylindrical stem portion, a circular thin plate of corrosion resistant metal serving as the anode and having one surface in contact with the surface of the flat support portion opposite the stem portion, a circumferential area and a central circular area of said thin metal plate being bent out of the plane of the plate to form a rim and a cup-shaped recess, respectively, said recess having a bottom portion and a substantialy annular side wall, a plu rality of perforations through said side wall, said recess and said rim being imbedded in the insulating support, the recess being filled with plastic material which filling material forms a bond with the remainder of the support through said perforations, a connector pinsecured to the bottom portion of the cup-shaped recess and extending through the stem portion of the support to protru

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)
US809565A 1959-04-28 1959-04-28 Anode assembly for cathodic protection systems Expired - Lifetime US3022243A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL127738D NL127738C (en, 2012) 1959-04-28
BE590158D BE590158A (en, 2012) 1959-04-28
NL250897D NL250897A (en, 2012) 1959-04-28
US809565A US3022243A (en) 1959-04-28 1959-04-28 Anode assembly for cathodic protection systems
FR823437A FR1253098A (fr) 1959-04-28 1960-04-05 Anode pour dispositif de protection cathodique
DEE19267A DE1209845B (de) 1959-04-28 1960-04-27 Anodenanordnung fuer kathodische Schutzeinrichtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US809565A US3022243A (en) 1959-04-28 1959-04-28 Anode assembly for cathodic protection systems

Publications (1)

Publication Number Publication Date
US3022243A true US3022243A (en) 1962-02-20

Family

ID=25201629

Family Applications (1)

Application Number Title Priority Date Filing Date
US809565A Expired - Lifetime US3022243A (en) 1959-04-28 1959-04-28 Anode assembly for cathodic protection systems

Country Status (4)

Country Link
US (1) US3022243A (en, 2012)
BE (1) BE590158A (en, 2012)
DE (1) DE1209845B (en, 2012)
NL (2) NL250897A (en, 2012)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215613A (en) * 1960-09-15 1965-11-02 Western Plastics Corp Anode assembly
US3410772A (en) * 1965-05-28 1968-11-12 Navy Usa Method for attaching impressed current anodes for cathodic protection
US3617101A (en) * 1969-06-13 1971-11-02 Engelhard Min & Chem Reference electrode for cathodic protection systems
US20110056141A1 (en) * 2009-09-08 2011-03-10 Us Synthetic Corporation Superabrasive Elements and Methods for Processing and Manufacturing the Same Using Protective Layers
US20120151847A1 (en) * 2010-12-21 2012-06-21 Ladi Ram L Protective system for leaching polycrystalline diamond elements
US20190113160A1 (en) * 2017-10-12 2019-04-18 Tony Gerun Flange tab system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US393072A (en) * 1888-11-20 Quand
US799061A (en) * 1896-07-07 1905-09-12 Carl Kellner Electrolytic apparatus and electrodes therefor.
US994405A (en) * 1910-05-03 1911-06-06 John Evans James Electrical arrangement for protecting ships' bottoms from barnacles or aquatic life and such like.
GB191204251A (en) * 1911-09-04 1912-06-13 Peregrine Elliot Gl Cumberland Improvements relating to Electrodes or Anodes Employed in the Prevention of Corrosion in Steam Boilers and other Liquid containing Structures.
US1302959A (en) * 1919-05-06 Production of electrodes
US1788904A (en) * 1928-11-14 1931-01-13 Bamag Meguin Ag Electrolytic cell for decomposing water
US1900011A (en) * 1931-06-23 1933-03-07 Harold L Durham Corrosion preventing attachment for boats
US2910419A (en) * 1956-12-28 1959-10-27 Herman S Preiser Energized anode holder assembly
US2910420A (en) * 1957-07-31 1959-10-27 Herman S Preiser Cathodic protection system and electrode holder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400039A (en) * 1933-01-23 1933-10-19 Harold Leon Durham Corrosion preventing attachment for boats and other metal parts in contact with water

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US393072A (en) * 1888-11-20 Quand
US1302959A (en) * 1919-05-06 Production of electrodes
US799061A (en) * 1896-07-07 1905-09-12 Carl Kellner Electrolytic apparatus and electrodes therefor.
US994405A (en) * 1910-05-03 1911-06-06 John Evans James Electrical arrangement for protecting ships' bottoms from barnacles or aquatic life and such like.
GB191204251A (en) * 1911-09-04 1912-06-13 Peregrine Elliot Gl Cumberland Improvements relating to Electrodes or Anodes Employed in the Prevention of Corrosion in Steam Boilers and other Liquid containing Structures.
US1788904A (en) * 1928-11-14 1931-01-13 Bamag Meguin Ag Electrolytic cell for decomposing water
US1900011A (en) * 1931-06-23 1933-03-07 Harold L Durham Corrosion preventing attachment for boats
US2910419A (en) * 1956-12-28 1959-10-27 Herman S Preiser Energized anode holder assembly
US2910420A (en) * 1957-07-31 1959-10-27 Herman S Preiser Cathodic protection system and electrode holder

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215613A (en) * 1960-09-15 1965-11-02 Western Plastics Corp Anode assembly
US3410772A (en) * 1965-05-28 1968-11-12 Navy Usa Method for attaching impressed current anodes for cathodic protection
US3617101A (en) * 1969-06-13 1971-11-02 Engelhard Min & Chem Reference electrode for cathodic protection systems
US20110056141A1 (en) * 2009-09-08 2011-03-10 Us Synthetic Corporation Superabrasive Elements and Methods for Processing and Manufacturing the Same Using Protective Layers
US9352447B2 (en) * 2009-09-08 2016-05-31 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US11420304B2 (en) 2009-09-08 2022-08-23 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US20120151847A1 (en) * 2010-12-21 2012-06-21 Ladi Ram L Protective system for leaching polycrystalline diamond elements
US8404019B2 (en) 2010-12-21 2013-03-26 Halliburton Energy Services, Inc. Chemical agents for recovery of leached materials
US8435324B2 (en) 2010-12-21 2013-05-07 Halliburton Energy Sevices, Inc. Chemical agents for leaching polycrystalline diamond elements
US20190113160A1 (en) * 2017-10-12 2019-04-18 Tony Gerun Flange tab system
US10408369B2 (en) * 2017-10-12 2019-09-10 Tony Gerun Flange tab system

Also Published As

Publication number Publication date
DE1209845B (de) 1966-01-27
BE590158A (en, 2012)
NL250897A (en, 2012)
NL127738C (en, 2012)

Similar Documents

Publication Publication Date Title
US2779729A (en) Cathodic protection assembly
US3012958A (en) Vitreous lined water tanks with sacrificial anodes
US4478915A (en) Corrosion resistant shim for electrically joining incompatible materials
US3022243A (en) Anode assembly for cathodic protection systems
CN205821458U (zh) 一种用于舰船海水管路的牺牲阳极
US2478478A (en) Potential gradient anode for galvanic protection
US1506306A (en) Anode
US2856342A (en) Anti-corrosion anode
US20180187314A1 (en) Cathodic protection of metal substrates
US2934485A (en) Device and its use for protecting elements against galvanic dissolution
US3058086A (en) Anode
US3075911A (en) Cathodic protection anode assembly
US3408280A (en) Anode-assembly for cathodic protection systems
US3836438A (en) Apparatus for the recovery of leakages of brine in the metallic bottoms of diaphragm cells
US3129161A (en) Reference electrode assembly
US11091841B2 (en) Autonomous impressed current cathodic protection device on metal surfaces with a spiral magnesium anode
WO2017007334A1 (en) Cathodic protection systems
EP2586103A1 (en) Subsea container electrical through connector
US3019177A (en) Cathodic protection anode assembly
US4946570A (en) Ceramic coated strip anode for cathodic protection
US6239360B1 (en) Grounding structure for electromagnetic wave shield
US5372687A (en) Cathodic protection disk anode
US3437579A (en) Anode assembly
US2187143A (en) Insulator
US3342716A (en) Anode for cathodic protection system