WO2007013826A1 - Support d'anode sacrificielle et anodes associees - Google Patents

Support d'anode sacrificielle et anodes associees Download PDF

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Publication number
WO2007013826A1
WO2007013826A1 PCT/NZ2006/000198 NZ2006000198W WO2007013826A1 WO 2007013826 A1 WO2007013826 A1 WO 2007013826A1 NZ 2006000198 W NZ2006000198 W NZ 2006000198W WO 2007013826 A1 WO2007013826 A1 WO 2007013826A1
Authority
WO
WIPO (PCT)
Prior art keywords
anode
housing
holder
sacrificial anode
vessel
Prior art date
Application number
PCT/NZ2006/000198
Other languages
English (en)
Inventor
Peter Frank Sewell
Original Assignee
Peter Frank Sewell
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
Application filed by Peter Frank Sewell filed Critical Peter Frank Sewell
Publication of WO2007013826A1 publication Critical patent/WO2007013826A1/fr

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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
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B63B59/04—Preventing hull fouling
    • 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
    • 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
    • C23F13/22—Monitoring arrangements therefor
    • 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

  • the present invention relates to a sacrificial anode holder and related anodes.
  • Sacrificial anodes have been used in boats and oil rigs for many years.
  • the use of sacrificial anodes is considered to be an essential element to prevent metallic corrosion of such structures. Corrosive activity arises when two different metals are electrically connected and/ or come into contact with water. Such a process is known as galvanic corrosion and can rapidly decay metal.
  • An effective method of reducing galvanic corrosion is to introduce a sacrificial anode. This is usually of zinc.
  • the present invention consists in a sacrificial anode holder for use by a water borne vessel, said holder comprising a first member comprising at least one of (i) a cartridge to hold an elongate anode and (ii) an elongate anode, and a housing forming part of or being adapted to fit to the vessel to house said first member, said housing including a first aperture to expose said anode through the hull of said vessel to said water and a closable second aperture via which said first member can be removed from said housing and inserted into said housing, from the interior of the vessel.
  • said housing carries a moveable valve to close passage of water through said housing from said first aperture to said second aperture.
  • the valve includes a one way valve flap movable between a closed position to extend across the passage between the first and second aperture and an open position and that is held in the open position by said first member when housed by said housing and can move to the closed position when the anode has been removed from housing.
  • the valve includes a valve seat defined by a Hp contiguous part of an inner wall surface of the housing and projecting and presented therefrom to receive an edge of the valve flap when in the closed position.
  • valve flap in contiguous part of the inner wall surface of the housing.
  • the present invention consists in a sacrificial anode holder as hereinbefore described further including; a thin walled rigid valve seat defined at an inner wall of said housing between said first and second apertures said valve seat being a ledge, a valve flap hingeably mounted at the inner wall to move between an open condition and a closed condition, wherein said valve flap has a first major side that is of a shape commensurate the shape of part of the inner wall so that in the open condition it sits flush against said the inner wall, and wherein said valve flap has a perimeter of a shape in part complimentary the valve seat so that when in said closed condition said flap valve extends across the passage between said first and second aperture and places its perimeter contiguous that of the valve seat.
  • valve flap is of a constant wall thickness.
  • said flap valve is engaged to said duct or has its hinge axis fixed relative to said duct via a live hinge.
  • said hinge axis of said valve flap is at the inner wall.
  • valve seat is defined by a bush, insertable into a duct, said bush being of an exterior surface shape when viewed in its longitudinal direction that is commensurate with the interior surface of said housing.
  • said valve seat presents at least one planar surface with which a planar surface of said valve flap can seat.
  • the perimeter of said valve seat presents two planar edge surfaces with which two corresponding planar surfaces of the perimeter of said valve flap can seat.
  • each of the planar surfaces of said valve seat and valve flap are non parallel when in the open position and are parallel when in the closed position.
  • valve flap is of constant curvature along its length. It is preferably of a section of a tube.
  • said flap valve is defined from a section of a tube.
  • said valve seat where it is defined as a bush is of constant curvature along its length.
  • the present invention consists in a sacrificial anode holder as hereinbefore described wherein the housing holds said first member in close proximity at least at longitudinally extending contiguous regions.
  • the present invention consists in a sacrificial anode holder as hereinbefore described wherein said housing includes an elongate sleeve section into an out of which said first member can slidingly move through said second aperture.
  • said housing has an inboard more end and outboard more end and defines said first aperture at said outboard more end of said sleeve and said second aperture at said inboard more end of said sleeve.
  • a flange extends radially outwardly from said sleeve at said outboard more end to sit outboard and against the hull of said vessel, and wherein said sleeve includes a threaded outer surface to receive a nut to clamp said housing to said hull between said nut and said flange.
  • the present invention consists in a sacrificial anode holder as hereinbefore described wherein said first member is a cartridge holding said anode.
  • said cartridge includes a sleeve (herein after "second sleeve") provided about the elongate direction extending surfaces of the anode and includes an opening through which said anode is exposed, said opening positioned in use, proximate said first aperture.
  • the second sleeve is insertable into the first mentioned sleeve from the inboard more end of the first mentioned sleeve.
  • the present invention consists in a sacrificial anode holder as hereinbefore described wherein said anode is held in use to be movable relative said housing in its elongate direction and is biased in an outboard direction of said vessel from said holder.
  • said bias is affected by gravity by mounting of said holder to said vessel in an orientation such that said elongate direction of said anode is vertically- extending.
  • said bias is affected by a spring acting between said anode and the inboard end of said housing.
  • the present invention consists in a sacrificial anode holder as hereinbefore described wherein at least one anode stopper is presented against which an outboard most end of said anode is biased in use, said stopper preventing the anode from passing entirely out of said housing through said first aperture.
  • said at least one stopper extends partially across the first aperture.
  • the at least one stopper is provided by at least one of the first member and housing.
  • the at least one stopper comprises of a washer presented at the outboard end of the anode and held by a connection rod extending dirough a bore of said anode from the inboard more end thereof, said bore being of a size smaller than said washer and said connection rod coupled to said housing to hold said anode.
  • a castellation formed at the outboard end of die first member (preferably the second sleeve thereof) can locate therewith to lock rotation of the first member with said housing.
  • the outboard more end is at or proximate which the anode is presented for outboard positioned more contact with the surrounding water and the inboard more end includes said second aperture that is a generally closed or capped.
  • the stopper is provided outboard of the hull of said vessel allowing said anode to extend proud of the hull.
  • said stopper includes a bar that extends across said first aperture and against which said anode is pressed by a biasing means.
  • said anode has a plurality of parallel slots that extend in the longitudinal direction from the outboard most end of said anode.
  • said stopper is at least one bar that extends parallel to said slots and is positioned for an outboard most portion of said anode to press against.
  • one of said housing and cartridge includes a grill extending across said first aperture, said grill positioned in the slots of said anode.
  • the housing and cartridge could be any particular shape in cross section, for example circular, square, hexagonal, crescent, pentagonal or indeed may even incorporate straight and curved areas. Shapes other than circular can have die advantage of locking relative movement of the housing and cartridge together about an axis or axes parallel to their longitudinal direction.
  • the castellations provided at the end of the cartridge may also perform the same function when engaged with the stoppers for the housing.
  • first member and the housing are generally tubular in cross section and when assembled, are concentric each other.
  • said sleeves are f ⁇ xable in their elongate directions relative each other at different dispositions to allow adjustment in the placement of the anode to be made.
  • the first mentioned sleeve defines said second aperture as an inboard more opening of a size and shape through which said second sleeve of said first member can pass.
  • the cartridge includes a biasing means acting between the anode and the cartridge to bias the anode toward the outboard more end of the cartridge.
  • the housing has been adapted to span a pre-formed aperture within the hull of a vessel and be able to be locked into a fluid tight position about die hull adjacent the aperture.
  • the cartridge includes a flange to seat onto the second aperture of said housing members and thereby close said second aperture and locate the cartridge with said housing.
  • the cartridge includes a plug to push into the second aperture of said housing members and thereby close said second aperture and locate the cartridge with said housing.
  • said housing includes an external thread at the inboard more end thereof to receive a threaded clamp to secure and press said flange against said seat.
  • said clamp is an overcap to close said second aperture.
  • said clamp can be locked to at least one both of said housing and cartridge.
  • said locking of said overcap is by slit-pin, locating pin, snap-lock mechanism or similar.
  • this will ensure on a repeated basis that the cooperating members are correctly positioned when connected, thus ensuring that the optimum operative connection between the cooperating members has been.
  • the cartridge and housing include cooperating locked features that lock the two together (such as the castellations mentioned above or alternatives mentioned below) .
  • die present invention consists in a sacrificial anode as hereinbefore described wherein the anode includes a longitudinal key way located in a longitudinally sliding manner with a key of one of said housing and cartridge.
  • the present invention consists in a sacrificial anode as hereinbefore described wherein the anode is engaged by an electrical connector passing through said housing and into said vessel.
  • the present invention consists in a water submerged or partially submerged vessel or structure that has affixed to its hull, a sacrificial anode holder as hereinbefore described wherein the first aperture is positioned below the waterline to present the outboard more end of the anode to the surrounding water and wherein the second aperture is positioned inboard of the hull to allow the removal of the anode from the housing via the second aperture from within the vessel or structure.
  • the sacrificial anode holder holds an anode within its housing.
  • die sacrificial anode holder holds an anode within its housing said anode sitting proud of the exterior surface of the hull of said vessel.
  • said anode is slidingly housed within said housing and a spring is located to act between said housing and anode to press the outboard most end of said anode in an outboard direction against at least one anode stopper fixed relative said housing.
  • the present invention consists in a waterborne vessel that has affixed to its hull a sacrificial anode holder as hereinbefore described wherein the first aperture is positioned below die waterline of the vessel, said housing and first member are positioned to the interior of the hull of the vessel and wherein said stopper is affixed on the exterior to the hull of said vessel.
  • the present invention consists in a sacrificial anode holder for a water submerged or partially submerged vessel or structure, said holder comprising: a housing to hold an elongate sacrificial anode that includes an inboard and outboard distal end, said housing including a sleeve section into which said sacrificial anode can be inserted through a closeable opening of said housing that is positioned inboard of said vessel, said housing including an outboard opening to expose said anode to the surrounding water, and wherein the holder includes an anode stopper acting on the outboard end of said anode at where, in use, galvanic erosion reducing the end to end length of said anode predominantly occurs, wherein in use said anode is biased for movement within the housing to be pressed against the stopper to ensure a constant positioning of the eroding end of the anode relative said housing.
  • the present invention consists in a sacrificial anode holder for a water submerged or partially submerged vessel or structure comprising: a housing to retain a straight elongate anode, that includes an inboard and outboard distal end, in an elongate direction sliding manner, said housing engaged inboard of said vessel and including an outboard proximal opening to allow exposure of the anode to the surrounding water, wherein said anode is of a non-circular cross sectional perimeter and said housing and said anode are in a close fitting relationship to thereby prevent relative rotation in a direction parallel to the elongate direction.
  • said housing includes a stopper to capture said anode from sliding out of said outboard opening and against which, in use, said anode is pressed.
  • the housing includes a key to locate into a keyway extending in the elongate direction at the non-circular cross sectional perimeter of said anode.
  • the present invention consists in an elongate sacrificial anode that includes a keyway formed at an elongate direction extending surface of said anode.
  • the present invention consist in an elongate and straight sacrificial anode that has a first and second distal end and that includes a keyway extending from said first distal end at an elongate direction extending surface of said anode.
  • the present invention consists in an elongate and straight sacrificial anode that has a first and second distal end and that is of a non circular cross sectional perimeter.
  • the first aperture is positioned below the waterline of the vessel to present the outboard more end of the anode to the surrounding water and wherein the second aperture is positioned inboard of the hull of the vessel to allow the removal of the anode from the housing via the second aperture from within the vessel.
  • the present invention consists in a water submerged or partially submerged vessel or structure as hereinbefore described wherein the sacrificial anode holder holds an anode within its housing.
  • the sacrificial anode holder holds an anode within its housing said anode sitting proud of the exterior surface of the hull of said vessel.
  • said anode is slidingly housed within said housing and a spring is located to act between said housing and anode to press the outboard most end of said anode in an outboard direction against at least one anode stopper fixed relative said housing.
  • Figure Ia illustrates a cutaway elevation view of one embodiment of the present invention
  • Figure Ib illustrates a cutaway elevation view of another embodiment of the present invention
  • Figure Ic is a sectional view through a housing and anode and illustrates a variation to the stopper arrangement that may be utilised
  • Figure 2a shows a plan view of the embodiment as illustrated in Figure Ia
  • Figure 2b shows a plan view of the embodiment as illustrated in Figure Ib
  • Figure 3 is a perspective view of part of the cartridge or housing illustrating a location key and stopper or stoppers at the outboard end
  • Figure 4 is a plan view of an anode adapted to be received by the cartridge or housing of Figure 3,
  • Figure 5 is a sectional view through part of a hull of a vessel and showing an anode retained by a stopper that is positioned outside of the hull of the vessel
  • Figure 6a illustrates a cutaway elevation view of another embodiment of the present invention where the housing includes a flange against the outside of the hull
  • Figure 6b incorporates a cutaway elevation view of the embodiment shown in Figure 6a but incorporating the stopper features of the embodiment shown in Figure Ib,
  • Figure 7 shows a cutaway partially exploded elevation view of another embodiment of the present invention whereby a biasing means is employed to encourage the anode toward the outside of the hull,
  • Figure 8 illustrates an exploded cutaway view as shown in Figure 7
  • Figure 9 shows a cutaway elevation view of an outward extension allowing the zinc anode to extend beyond the hull surface
  • Figure 10a shows a perspective view of the internal valve component
  • Figure 10b shows an elevation view of the valve component shown in Figure 10a as viewed from the direction A as indicated in Figure 10a
  • Figure 10c shows a section view of the hinge component as identified by region X 1 in Figure 10b
  • Figure 11a shows a perspective view of the internal valve component inherent within the present invention
  • Figure lib shows an elevation view of the valve component shown in Figure 11 a as viewed from the direction A of Figure 11a
  • Figure lie shows a section view of the hinge component as identified by region Y 1 in Figure lib,
  • Figure 12 shows a perspective view of the valve component as shown in Figures 10-11 with the valve components upside down showing the seat at which the hinge flat portion rest against for secure closure,
  • Figure 13 shows a perspective cutaway view of the valve component shown in Figures 10-12 as positioned in an open condition within the housing
  • Figure 14 shows a perspective cutaway view of the valve component shown in Figures 10-13 as positioned in a closed condition within the housing
  • Figure 15 is a perspective view of an anode showing it containing a spline of slot
  • Figure 16 is an end view of the cylinder as part of the invention of the present invention showing anode stoppers protruding into the opening through which the anode could otherwise project, and
  • Figure 17 is a perspective view of the housing showing castel irritations for registering with the stoppers as shown in Figure 16,
  • Figure 18 shows a perspective view of an alternative embodiment of the zinc anode
  • Figure 19 shows a perspective view of part of the housing for the anode of
  • Figure 2OA shows a section view of the outboard end of the housing
  • Figure 2OB shows a section view of Figure 2OA but showing the anode erosion
  • Figure 21 A shows a perspective view of part of the housing including anode stoppers
  • Figure 21B shows the perspective view of Figure 21A and including an anode
  • Figure 22 is a front elevation view of zinc anode holder assembly showing the spacer elements applied to the current assembly to vary the exposure of the zinc anode into the water, and
  • Figure 23 shows a vessel that includes an anode holder as herein after described.
  • FIG. 1 shows a cutaway sectional view of one embodiment of the present invention.
  • the holder (700) may generally include the housing (12) for locating a zinc sacrificial anode (1) to be substantially enclosed and preferably captured substantially within a "well" of an elongate housing (12).
  • the anode (1) is preferably elongate in nature and substantially straight and constant in cross section (taken transverse to the elongate direction). It is preferably substantially circular in cross sectional perimeter shape (taken transverse the elongate direction). It is preferable that the housing (12) spans a length to accommodate a majority if not all of the anode (1).
  • the housing has a distal or inboard more end (177) that is generally closed but has an openable opening positioned or to be positioned inboard of a vessel.
  • the housing also has a proximal or outboard more end (178) that includes an opening (179) to expose the anode to the surrounding water in which the vessel is floating.
  • the stud may be electrically connected to the anode (1) thus ensuring the appropriate connectivity between the two components.
  • the stud may be threaded or cast into the anode.
  • a flexible wire may be cast into the anode to connect the stud and anode.
  • the portion of the stud (3), preferably projecting from the distal end (117) of the housing (12) and in its normal mode of operation, is configured so as to be able to connect to wires (4) that are intended to facilitate further electrical connections for the purposes of reducing galvanic corrosion.
  • the diameter of the anode is slightly smaller than the internal diameter of die anode housing (12).
  • a circumferential gap (10) may exist about the anode (1). Within the housing (12), this gap (10) may allow for water to ingress and make contact substantially with all of the anode (1). However such water in the gap (10) will have low circulation thereby resulting in low erosion of the anode (1) at such regions.
  • the housing (12) may include a mounting flange (13) at its proximal end (178) and may be provided with a male screw thread, that may span the entire length of the exterior surface of the housing (12) up to the flange (13).
  • a nut (7) containing a complementary female screw thread to that of the male screw thread located on the housing (12) may engage therewith.
  • a nut (9) that also contains a cap member may provide the same.
  • an exterior surface of the vessel hull (5) receives the flange (13) of the housing (12).
  • the flange is preferably substantially flush with the exterior surface of the hull (5) as shown in Figure Ia or may sit proud as shown in Figure 6a.
  • a nut (7) may be used to clamp the flange (13) to it tightens onto the interior surface of the hull (5) forming a watertight seal between the hull (5).
  • the anode (1) may be removably located directly into the housing. In another mode, the anode (1) may be retained by a cartridge (2) removably located inside the housing (12).
  • the cartridge may enclose a substantial part or only a small part of the electrode.
  • the cartridge (2) has side walls that extend substantially the entire length of the anode (1).
  • the cartridge is preferably a sleeve or cylinder with an open end outboard most.
  • side walls need not project such a distance and may alternatively be significantly shorter in length extending from the proximal end.
  • the cartridge may merely consist of the end flange (11) or base and means for retention of the anode (1) therewith.
  • the interior diameter or size and shape of the housing (12) is complimentary to the exterior diameter or size and shape of the cartridge (2) to allow a snug sliding engagement to be established therebetween.
  • a tight fit between the outside of the cartridge and inside surface of the housing is desired to prevent marine organisms growing between the cartridge (2) and the housing (12).
  • An "O" ring seal (6) may facilitate this.
  • the cartridge (2) may slide into the housing (12) from the inboard side until the shoulder (11) abuts the proximal top face or seat (236) of the housing (12).
  • a nut (9) may be passed over the ends of the housing (12) and cartridge (2) locking these together. Nut (9) tightening will create a water tight seal, enclosing the housing save for at the opening (179).
  • Figure 16 there is shown an end view of the housing (12) wherein the stoppers (40) are shown to be projecting radially inwardly from the fairing or flange.
  • a perspective view of the cartridge (2) is shown.
  • the cartridge (2) may at its end- (113), include castellations (114) which are of a shape and location so as to be able to sit onto the stoppers (40) of the housing (12) as shown in Figure 16. This allows for the cartridge (2), to register with the housing (12). Such registration will lock relative rotation between the housing (12) and the cartridge (2). This has the advantage that when the nuts or fasteners at the other end of the cartridge (2) are being tightened, the cartridge (2) will not rotate relative to the housing (12) due to the forces being applied to the fasteners.
  • the proximal end (180) of the anode, adjacent or at the proximal end (178) of the housing (12) is presented to water. It is at this end that consumption or erosion of the anode (1) will predominantly occur. Exposure of the end (180) of the anode to the exterior body of water to the hull of the vessel will ensure that the highest degree of circulation of water occurs at this end (180) rather than along other surfaces of the anode towards the opposite end of the anode.
  • the anode (1) may be retained by the housing (12) without also being retained within or by the cartridge
  • Erosion of the anode at the distal end (180) will result in a progressive shortening of the anode in its longitudinal direction. It is desirable to keep this eroding end at a constant position. This may occur either by gravity, manually by a displacement mechanism to move the anode (1) relative to the housing (12) of by other mechanisms such as a spring which will hereinafter be described.
  • the height of the housing (12) may be greater than the level of water that surrounds the vessel (denoted by the dashed line (8) in Figure 1) when the vessel is in the water. Access and subsequent periodic inspection of the state of the sacrificial anode (1) can take place without the possibility of flooding the vessel.
  • the sealing valve (53) is located inside the housing between the opening (179) and the closable opening at end (177).
  • the valve (53) includes a valve flap (15) which is hingeably engaged at X 1 , to a sleeve portion (52).
  • a live hinge (14) is used.
  • FIG 10b shows a front elevation view of the sealing valve (53) as indicated from the direction "A" indicated in Figure 10a.
  • the valve flap (15) in a closed position restricts the access or ingress of water toward the end (54) of the valve (53) by articulating at the hinge (14) to rotate point D to D 1 as indicated on Figure 10b. This effectively closes the valve. Points D and D 1 lie at a distal end of the valve component (53).
  • the hinge (14), which facilitates articulation of the valve flap (15) with respect to the sleeve (52), may be defined in a number of ways. Preferably it is provided for articulation that will not restrict entry of the anode (1) into the housing. Preferably it sits flush against the inside wall of the housing (12).
  • FIG 11a shows the same perspective view as shown in Figure 10a, however the valve flap (15) is now illustrated in a closed condition. This is illustrated in Figure lib which shows a front elevation view as indicated by direction B and Figure 11a.
  • the hinge (14) is shown in a sectional view in Figure lie.
  • Figure 12 shows a valve (53) in an open condition.
  • the valve (53) is preferably insertable into the housing (12).
  • the surface or edge (109) of the valve flap (15) is of the same profile as the edge or seat (56) of the sleeve portion (52).
  • edge shape is preferably flat or complimentary and preferably sits parallel with the flat or complimentary surface of die edge (109) when in the closed condition. Water pressure of the surrounding body of water will press and hold the valve flap shut.
  • surface (110) of the edge (56) is presented to allow for it to sit flush with the surface (not shown) of the edge (109) as shown in Figure 12.
  • the valve flap (15) articulates to rest against the edge or seat (56) of the sleeve (52). The meeting of these two complementary edges allows an effective seal to be established.
  • the edges (56) and (109) may be lined with appropriate sealing materials or substances that enhance the sealing properties of the valve (53).
  • both the valve flap (15) and the sleeve (52) are of a substantially part cylindrical and constant cross section. Accordingly when in the open condition, both the valve flap (15) and the sleeve (52) present little or no obstruction to the well of the housing.
  • FIG 13 shows a perspective cutaway view of the valve (53) sitting internal to the hollow plastic housing (12) of the kind as described.
  • the valve (53) is shown in its opened condition whereby a cartridge and/or zinc anode may be captive within the assembly for normal operation.
  • Figure 14 shows the same perspective cutaway view of the valve (53) in a closed condition showing the situation whereby a zinc anode has been removed enabling the valve flap (15) to close and thus prevent water entry or ingress.
  • Figure Ib illustrates a further embodiment of that shown in Figure Ia, wherein axial movement stoppers (40) extend inward to the opening (179).
  • axial movement stoppers (40) may extend from the housing (12) at or near the flange (13) or from the cartridge (2). They are of a size and shape so that the anode (1) is retained within the housing (12) and cannot completely pass out through the opening (179) unless perhaps when completely depleted. The stopper presents interference to such passage.
  • Such stopper(s) (40) may be established by the use or inclusion of a constricting opening (179) defined by a circumferential lip.
  • the sacrificial anode (1) is exposed to the water (sea or fresh as die case may be) as much as possible hence the stoppers are preferably discrete lips extending partially across the opening (179) or a bar or bars extending completely across the opening.
  • the anode As the anode erodes at its end (180) the anode can be displaced in the outboard direction. Continual erosion will mean that the stoppers are in contact with newly exposed anode, as erosion takes place.
  • the use of a lip or lips or narrow bar(s), having small surface contact with the anode, can also facilitate the refreshing of anode surface contact by the lips.
  • reduced erosion will take place due to reduced circulation of water at such interface.
  • Being lip or narrow in form will result in a small castellation being generated of die anode. Such a castellation will be relatively fragile and may fracture thereby refreshing the contact between the anode and the lip or lips and displacement of die anode in an outboard direction.
  • stoppers, (40) are shown to be projecting into die opening (179) and are formed integrally with the housing (12). Alternatively such stoppers may be provided by the cartridge (2).
  • a variation to die stopper (40) is shown wherein the stopper (40) consists of a washer or hook or lip or the like that is held by a connection rod (185) engaged directiy or indirecdy to die housing (12).
  • the anode (1) shown in cross section may include a bore (186) to receive a connection rod (185) to hold the washer and thereby act as a stopper to prevent the anode from passing entirely through die opening (179) of the housing (12).
  • the washer sits on the distal end erosion surface of the anode and thereby allows the anode to maintain constant distal end exposure to water.
  • the screw thread may extend through the housing (12) and into an aperture of the anode incorporating a complementary internal thread.
  • the screw thread portion may terminate with a handle or similar, hence allowing a user to manually wind it to displace the zinc anode at regular intervals to ensure the proximal or outboard more surface (180) has good water exposure.
  • a mechanical device that can control the axial positioning of the anode (1) relative the housing (12) need not be utilised.
  • gravity may bias the sacrificial anode (1) towards the proximal end (178), the stopper or stoppers (40) preventing a dropping of the entire anode (1) out through the opening (179) in a normal mode of use.
  • a flexible wire (49) may make the electrical connection between the stud (3) and the anode (1). This flexible wire can accommodate the travel of the anode (1) within the housing (12).
  • the holder of the present invention may incorporate a biasing means (41) between the inner distal end (106) of the cartridge (2) and the zinc anode (1).
  • the biasing means (41) (such as a coil spring or the like) exists to encourage the zinc anode (1) in an outboard direction such as towards the proximal end (178) of the housing (12).
  • biasing means (41) allows continual bias and displacement of the eroding zinc anode (1) toward the proximal end. It will be appreciated that this will maintain the exposure of the zinc anode (1) at any given time to the sea water as the anode is eroded.
  • the stopper such as the stopper (40) is used in conjunction with a biasing means (41).
  • Electrical connection may be maintained by use of a wire fastened or cast within the sacrificial anode (1).
  • the electrical connection may be achieved by way of the spring (41) being in contact with the zinc anode (I).
  • the spring may be positioned between the anode (1) and the housing (12) to bias the spring in an outboard direction.
  • Figure 9 represents an additional mode of increasing the exposure of the zinc anode (1) to the sea water environment. This involves a protruding structure (50) having stoppers (40) (performing the function as has previously been described herein) allowing the zinc anode (1) to project outside the hull extremity.
  • the structure may be grommet shaped or may be a radially extending flange with gaps or slots in between.
  • Such a structure (50) may be more preferable for use in recreational or cruising yachts however it may also be adapted for use within race or performance yachts.
  • Fairing may be employed to form a fairing portion that is aligned with the general axis of the hull (or the forward direction of movement) whereby allowing the transverse or side portions to be omitted thus allowing such sides of the zinc anode to be exposed completely to the marine sea water environment yet being retained in place by the stoppers (40).
  • the stoppers (40) may only be one or two inwardly projecting protrusions of enough material and sufficient strength to retain the zinc anode in the appropriate position.
  • Figure 5 illustrates a sectional view through a hull (5) wherein the anode (1) held by the housing (not shown) is presented proud of die exterior surface (500) of the hull (5) of the vessel. The anode (1) is located against a stopper (600) that sits proud of the surface (500) of the hull.
  • the stopper may form part of the housing and/or part of the cartridge or may alternatively be affixed at die exterior of the hull.
  • Figure 18 shows an example where the surface area of the zinc is increased to improve the efficiency of the sacrificial anode.
  • the portion of the anode (1) diat is to be exposed to the sea water incorporates a series of fins (120).
  • the fins (120) may be of any shape or form to increase the surface area of the anode. Each fin is preferably uniform in thickness and in depth. The length of the fins may be to any depth of the anode (1).
  • the fins (120) may adopt other shapes that may be used to increase die surface area offered to the water when in use.
  • Figure 19 shows the flange portion (13) of the anode assembly of the present invention adapted to allow the fins (120) to be positioned further outward into the sea water.
  • the flange portion (13) incorporates apertures (122) that remain complimentary to the geometry of the fins (120) so that the apertures (122) allow the fins to protrude further into die sea water as is shown in Figure 20A and 2OB.
  • Figure 20A shows a cross section view of the assembly of the anode (1) widiin the anode cartridge (2) and housing (12) at the portion that is exposed to the water.
  • the fins (120) can be seen to protrude through apertures (122) within the flange portion (13). It may also be seen from Figure 20A that each fin (120) is captured by a stopper (121) corresponding to at least one and preferably each fin (120).
  • the stopper (121) stops the anode (1) from falling out. They are preferably one or a plurality of raised elements or bars that may be part of the anode cartridge (2) or housing (12) and that engage die ends of respective fins (120) of the anode (1) when assembled and in operation. It may be appreciated that at least one stopper (121) may be used to adequately capture and retain the anode (1) in the desired position.
  • This embodiment may work in conjunction with the biasing means or gravity to encourage the anode toward the stopper(s) (121) and thus ensuring that the stopper (121) always engage the outer most surface of die fins (120) of the anode (1).
  • Figure 2OB shows die erosion of the fins (120) of the anode (1) over time whereby the original form of the fins (120) is shown as a broken line and indicated as XX'. The eroded form is identified as YY' with the most severe erosion occurring towards or at the region of the tip. As the ongoing erosion occurs, the tip will subsequendy wear dius reducing the overall length of the anode.
  • the capture elements may be aligned to be parallel with the longitudinal direction of die boat and thus aligned with the flow of the water over the hull surface.
  • the capture elements may be aerodynamically shaped by providing a faired shape to reduce drag.
  • Figure 22 shows the anode cartridge (2) and the fins (120) of the anode (1) that by adding spacer elements (132) to fit between the anode cartridge (2) and housing (12) allows positions A, B and C to be achieved. This can increase the distance between the anode cartridge (2) and the housing (12) in order to reduce the protrusion of the fins (120) through the flange portion (13) accordingly. Any number of spacer elements (132) may be used to generate the required exposure.
  • a key way or similar recesses may be incorporated within the anode (1) to coincide with complimentary features within the anode cartridge (2) or housing (12) to locate the orientation of the anode (1) when in place.
  • Such means for location of the anode may be achieved in any of a number of ways.
  • Relative rotation may be prevented between the cartridge (2) (or housing (12)) and the anode (1), as shown with reference to Figure 15 by a slot or key way or spline (116) or similar.
  • the slot (116) preferably extends longitudinally and preferably linearly along the anode (1).
  • a key lug or pin or similar may be provided to the interior surface of the cartridge (2) (or housing). The key can locate within the slot (116) to prevent relative rotation of the anode to the cartridge (2) and/ or housing. This may be desired for the purposes of keeping the anode aligned in a desired direction.
  • the anode may be of a non circular perimeter cross section to snugly locate inside of a complementary shaped housing or cartridge to thereby prevent relative rotation about an axis parallel the elongate direction.
  • the anode may be polygonal in cross sectional shape such as triangular or square to facilitate such an objective.
  • Figure 3 shows a perspective view of the outboard end of the cartridge or housing (2/12). At the opening (179) or proximate thereto, may be provided the stoppers (361). One or both of the stoppers (361) are positioned flanking a key (362). The key (362) is to be received in a key way (363) of an anode (1) as shown in plan view in Figure 4.
  • the anode in Figure 4 is substantially constant in perimeter cross section and includes a longitudinally extending key way (363) and preferably extends the entice length of the anode. It at least extends in from the outboard end of the anode towards its inboard end.
  • the key way is of a size to accommodate the key (362) therein.
  • the key (362) will ensure that the anode (1) remains rotationally fixed relative the cartridge (2) and/or housing (12). This will also ensure that the stopper or stoppers (361) are consistendy in contact with the anode (1) adjacent the same perimeter region.
  • the stoppers (361) are shown flanking the key (362), alternatively the stoppers may be provided at other locations to engage the erosion surface end of the anode (1) adjacent the perimeter of the anode (1).
  • the key (362) may be provided by the cartridge 2 and the stoppers (361) provided by the housing (12) or may be separately provided to the exterior of the hull from the housing. The key may also be of or engaged to the housing rather than the cartridge.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

L'invention concerne un support d'anode sacrificielle devant servir dans un navire à l'eau. Ce support comprend un premier élément qui comporte (a) une cartouche pour contenir une anode allongée, et/ou (b) une anode allongée, ainsi qu'un logement solidaire de ou conçu pour s'adapter dans le navire pour loger le premier élément. Une première ouverture ménagée dans le logement permet de mettre l'anode en contact avec l'eau à travers la coque du navire, alors qu'une seconde ouverture pouvant être fermée permet de placer et de retirer le premier élément du logement, depuis l'intérieur du navire.
PCT/NZ2006/000198 2005-07-29 2006-07-31 Support d'anode sacrificielle et anodes associees WO2007013826A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NZ54154005 2005-07-29
NZ541540 2005-07-29
NZ543745 2005-11-23
NZ54374505 2005-11-23
NZ544394 2005-12-21
NZ54439405 2005-12-21

Publications (1)

Publication Number Publication Date
WO2007013826A1 true WO2007013826A1 (fr) 2007-02-01

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PCT/NZ2006/000198 WO2007013826A1 (fr) 2005-07-29 2006-07-31 Support d'anode sacrificielle et anodes associees

Country Status (2)

Country Link
US (1) US20070029191A1 (fr)
WO (1) WO2007013826A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434375A (en) * 2006-01-20 2007-07-25 Malcolm John Perrins Immersed electrode assembly
WO2013190314A1 (fr) * 2012-06-20 2013-12-27 E M & I (Maritime) Limited Système de protection cathodique
WO2016083718A1 (fr) * 2014-11-27 2016-06-02 Electricite De France Traitement anticorrosif de structures portantes immergées
US9365936B2 (en) 2014-03-15 2016-06-14 Nicolas de Pierola Detachable retrievable outboard system and apparatus for sacrificial anodes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080238118A1 (en) * 2007-03-27 2008-10-02 Lear Corporation Thermoform hush panel clamshell design
US10604851B1 (en) 2016-03-02 2020-03-31 Galvotec Alloys, Inc. Sacrificial anodes for cathodic protection for production vessels, storage vessels and other steel structures
US10408369B2 (en) * 2017-10-12 2019-09-10 Tony Gerun Flange tab system
US11952670B1 (en) 2019-09-17 2024-04-09 Galvotec Alloys, Inc. Anode mounting head for heater treaters and other devices
FI129757B (en) * 2020-10-22 2022-08-15 Fenno Aurum Oy Ultraviolet flame detector

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US2776940A (en) * 1953-12-24 1957-01-08 Union Carbide & Carbon Corp Mounting for underwater anode for ship's hull
GB885047A (en) * 1958-08-13 1961-12-20 Engelhard Ind Inc Cathodic protection anode assembly
DE2548377A1 (de) * 1975-10-29 1977-05-05 Nakagawa Corrosion Protect Galvanische korrosionsschutzvorrichtung
FR2372245A1 (fr) * 1976-11-30 1978-06-23 Fricaud Joseph Dispositif de protection contre la corrosion des structures metalliques immergees dans de l'eau de mer
JPS6092997A (ja) * 1983-10-28 1985-05-24 Mitsubishi Heavy Ind Ltd 取替可能なシ−チエストアノ−ド
GB2243619A (en) * 1990-05-04 1991-11-06 William Newsam Mounting a sacrificial anode in the hull of a boat
US5256267A (en) * 1993-01-14 1993-10-26 Rheem Manufacturing Company Resistored sacrificial anode assembly for metal tank
US5342228A (en) * 1992-05-27 1994-08-30 Brunswick Corporation Marine drive anode
GB2302880A (en) * 1995-06-30 1997-02-05 Phillip John West Tapered sacrificial anode
DE19753097A1 (de) * 1997-11-29 1999-06-02 Volkswagen Ag Korrosionsvermeidung

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US4396034A (en) * 1981-02-23 1983-08-02 Cherniak George S Arcuate swing check valve
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US2776940A (en) * 1953-12-24 1957-01-08 Union Carbide & Carbon Corp Mounting for underwater anode for ship's hull
GB885047A (en) * 1958-08-13 1961-12-20 Engelhard Ind Inc Cathodic protection anode assembly
DE2548377A1 (de) * 1975-10-29 1977-05-05 Nakagawa Corrosion Protect Galvanische korrosionsschutzvorrichtung
FR2372245A1 (fr) * 1976-11-30 1978-06-23 Fricaud Joseph Dispositif de protection contre la corrosion des structures metalliques immergees dans de l'eau de mer
JPS6092997A (ja) * 1983-10-28 1985-05-24 Mitsubishi Heavy Ind Ltd 取替可能なシ−チエストアノ−ド
GB2243619A (en) * 1990-05-04 1991-11-06 William Newsam Mounting a sacrificial anode in the hull of a boat
US5342228A (en) * 1992-05-27 1994-08-30 Brunswick Corporation Marine drive anode
US5256267A (en) * 1993-01-14 1993-10-26 Rheem Manufacturing Company Resistored sacrificial anode assembly for metal tank
GB2302880A (en) * 1995-06-30 1997-02-05 Phillip John West Tapered sacrificial anode
DE19753097A1 (de) * 1997-11-29 1999-06-02 Volkswagen Ag Korrosionsvermeidung

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DATABASE WPI Week 198527, Derwent World Patents Index; Class Q24, AN 1985-162485, XP003006581 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434375A (en) * 2006-01-20 2007-07-25 Malcolm John Perrins Immersed electrode assembly
GB2434375B (en) * 2006-01-20 2008-09-03 Malcolm John Perrins Immersed electrode assembly
WO2013190314A1 (fr) * 2012-06-20 2013-12-27 E M & I (Maritime) Limited Système de protection cathodique
US9365936B2 (en) 2014-03-15 2016-06-14 Nicolas de Pierola Detachable retrievable outboard system and apparatus for sacrificial anodes
WO2016083718A1 (fr) * 2014-11-27 2016-06-02 Electricite De France Traitement anticorrosif de structures portantes immergées
FR3029212A1 (fr) * 2014-11-27 2016-06-03 Electricite De France Traitement anticorrosif de structures portantes immergees

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