EP0453486A1 - Holder device for marine anodes. - Google Patents

Holder device for marine anodes.

Info

Publication number
EP0453486A1
EP0453486A1 EP90902166A EP90902166A EP0453486A1 EP 0453486 A1 EP0453486 A1 EP 0453486A1 EP 90902166 A EP90902166 A EP 90902166A EP 90902166 A EP90902166 A EP 90902166A EP 0453486 A1 EP0453486 A1 EP 0453486A1
Authority
EP
European Patent Office
Prior art keywords
anode
ship
hollow
holder device
steel body
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.)
Granted
Application number
EP90902166A
Other languages
German (de)
French (fr)
Other versions
EP0453486B1 (en
Inventor
Joergen Leon Hoegberg
Bent Grumstrup Soerensen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0453486A1 publication Critical patent/EP0453486A1/en
Application granted granted Critical
Publication of EP0453486B1 publication Critical patent/EP0453486B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/18—Means for supporting electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • 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 holder device for a marine anode which is mounted to ship's cladding plates to prevent or reduce their corrosion, by connection to the ship's side of protruding end parts of anode carrier irons preferably em ⁇ bedded in the anode.
  • Known zinc anodes are provided with embedded anode carrier irons comprising for bent iron slabs whose opposing end parts protrude from the zinc anode and which usually are flush with a side face thereof. Opposing parts of the anode carrier iron are intended to be welded directly onto the ship's cladding plates; or the anode carrier iron is possibly connected to the cladding plates by means of bolts which are welded onto the ship's side.
  • the purpose of the invention is to provide a holder device for marine anodes by means of which the work with changing the marine anodes can be substantially facilitated and made less costly .
  • the holder device according to the invention is distinctive in that it comprises a steel body which is adapted to be wel ⁇ ded onto the exterior of the ship's side, and which is shaped with a hollow which is open to receive one of the said end parts of the anode carrier iron, and in that, in connection with the said hollow, the holder device comprises clamping means which are arranged to retain the said end part and to establish an efficient conductive connection between the said end part of the anode carrier iron and the ship's side.
  • the mounting itself of holder devices according to the invention possibly will require a docking of the ship; but then suc- ceeding changes can be made by a diver, possibly in a number of rounds, for example if a ferry in regular service is con ⁇ cerned.
  • a very substantial advantage in the anode holder de ⁇ vice according to the invention is that one can avoid always having to remove the old anode carrier irons by flame cut- ting, that is, one avoids creating cutting scars in the clad ⁇ ding plates of the ship.
  • the ship's side should be as smooth as possible.
  • the holder device is prefe ⁇ rably arranged such that at one side of the steel body which is intended to be placed against the ships's side, the said hollow corresponds with a top side edge and an end edge, fac- ing the anode, of the steel body, and in that the hollow is formed with a funneled shape, as opposite of the said end ed ⁇ ge the hollow is formed with a side face which slopes down ⁇ ward from the said top side edge towards a preferably hori- 5 zontal limiting edge, and as opposing the side of the steel body which is intended to be placed against the ship's side, the hollow slopes downward/inward at least on a partial stretch from the said top side edge and down to the horizon ⁇ tal limiting edge.
  • the holder device according to the invention can be arranged such that the said clamping means comprise a sturdy pointed screw which can be tightened, via a threaded bore from the front side of the steel body, against an end part of an anode carrier iron placed in the said hollow.
  • the holder device according to the invention can advantageously be sha ⁇ ped such that opposite the end edge which faces the anode, the steel body is shaped with a side face sloping in ward to-
  • Fig . 1 is a perspective view or illustrating a known way of 25 mounting an anode directly on the ship's side
  • Fig. 2 is a corresponding perspective view of an embodiment of anode holder devices according to the invention, for example for mounting the anode shown in Fig. 1 on a ship's side, and
  • FIG. 3 is a perspective view of an anode holder device accor ⁇ ding to the invention, cf. Fig. 2.
  • Fig. 1 shows a marine anode 2 as is known, consisting of an anode body 4 of zinc or of an alloy mainly of zinc wherein an anode carrier iron 6 consisting of a form-bent iron slab is mounted by embedding it in such a way that protruding end 5 " parts 8 of the anode carrier iron 6 are flush with the back side of the marine anode 2, such that the latter can be moun ⁇ ted closely to a ship's side 10 by welding the end parts 8 onto it.
  • the marine anode 2 as shown is intended for mounting on a straight side part of a vessel; but also curved marine 10 anodes are known for mounting on curved surfaces of ships.
  • the marine anode 2 shown in Fig. 1 can - as shown in Fig. 2 be mounted in anode holders 12 which are welded onto the ship's side 10 beforehand at correct mutual distances.
  • holders 12 are formed from steel and arranged to be welded onto the ship's side 10 with a sturdy circumferential weld - except for a corner area of the holder 12 where a hollow 14 is provided for receiving one of the end parts 8 of the anode carrier iron 6.
  • 25 conductive connection is established between the ship's side 10 and the marine anode 2.
  • the hollow 14 is double funnel-shaped as an end face 18 opposite the marine anode 2 slopes down from an upper side edge 20 from which a longitudinal surface part 30 22 slopes down as well, the surface part 22 passing into a face 24 which runs in parallel with a base surface 26 of the anode, that is also in parallel with the ship's side 10.
  • the anode holder 12 can be opened and closed by means of a sturdy hexagonal spanner as the sturdy pointed screw 16 is
  • anode holder accord ⁇ ing to the invention is adapted for known marine anodes. In the future it is expected, however, that marine anodes for different purposes may advantageously be adapted to anode " holders 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)

Abstract

La présente invention se rapporte à un dispositif de support pour une anode marine (2), qui est montée sur les tôles de placage recouvrant la coque du bateau pour empêcher ou atténuer leur corrosion par fixation au flanc (10) du bateau de pièces terminales saillantes (8) de fers porte-anode (6) de préférence noyés dans l'anode (2). Un tel dispositif de support se compose d'un corps en acier (12) qui est conçu pour être soudé sur l'extérieur du flanc (10) du bateau et qui présente un évidement ouvert (14) destiné à recevoir l'une des pièces terminales (8) du fer porte-anode (6) et, en relation avec l'évidement (14), le dispositif de support comprend des organes de boulonnerie (16) qui servent à retenir la pièce terminale (8) et à établir une liaison conductrice efficace entre la pièce terminale du fer porte-anode et le flanc (10) du bateau. De cette façon, on facilite sensiblement les opérations de changement des anodes marines et on en réduit le coût, dès lors que ce changement peut être effectué par un plongeur dans un temps relativement court, sans qu'il soit nécessaire de conduire le bateau au chantier ou de l'amarrer à quai.The present invention relates to a support device for a marine anode (2), which is mounted on the cladding sheets covering the hull of the boat to prevent or attenuate their corrosion by fixing to the side (10) of the boat protruding end pieces. (8) anode holder irons (6) preferably embedded in the anode (2). Such a support device consists of a steel body (12) which is designed to be welded to the outside of the side (10) of the boat and which has an open recess (14) intended to receive one of the parts terminals (8) of the anode iron (6) and, in relation to the recess (14), the support device comprises fasteners (16) which serve to retain the end piece (8) and to establish a effective conductive link between the end piece of the anode iron and the side (10) of the boat. In this way, the operations for changing the marine anodes are considerably facilitated and the cost is reduced, since this change can be carried out by a diver in a relatively short time, without it being necessary to drive the boat to the site. or moor it at the quay.

Description

Holder device for marine anodes
The present invention relates to a holder device for a marine anode which is mounted to ship's cladding plates to prevent or reduce their corrosion, by connection to the ship's side of protruding end parts of anode carrier irons preferably em¬ bedded in the anode.
With a view to preventing or reducing the galvanic corrosion of ship's cladding plates of metal, for example steel, it is known to mount specially shaped zinc anodes directly onto the ship's cladding plates with the purpose of protecting the steel plates and of concentrating the corrosive action on the anodes. Known zinc anodes are provided with embedded anode carrier irons comprising for bent iron slabs whose opposing end parts protrude from the zinc anode and which usually are flush with a side face thereof. Opposing parts of the anode carrier iron are intended to be welded directly onto the ship's cladding plates; or the anode carrier iron is possibly connected to the cladding plates by means of bolts which are welded onto the ship's side.
On larger ships a very large number of zinc anodes is used, for example 100 - 400 units. It goes without saying that the ship's zinc anodes must be changed at regular intervals. It is a very extensive and costly matter to change these anodes, and with larger ships the change of the anodes requires dock- ing, that is the ship must visit a yard. It must be mentioned that besides being corroded away as a result of galvanic cor¬ rosion, the anodes are also worn off which occurs in particu¬ lar when sailing in ice-filled waters. The layer of zinc oxi¬ de which is formed rather quickly on the surface of the anode and which shows that the anode works, is worn off again relatively quickly. Under normal conditions the anodes must be changed about once a year. It is not uncommon, however, that ships which sail in ice-filled waters must have changed the anodes a number of times a year. The purpose of the invention is to provide a holder device for marine anodes by means of which the work with changing the marine anodes can be substantially facilitated and made less costly .
The holder device according to the invention is distinctive in that it comprises a steel body which is adapted to be wel¬ ded onto the exterior of the ship's side, and which is shaped with a hollow which is open to receive one of the said end parts of the anode carrier iron, and in that, in connection with the said hollow, the holder device comprises clamping means which are arranged to retain the said end part and to establish an efficient conductive connection between the said end part of the anode carrier iron and the ship's side. In this way it becomes possible to attain a substantial facili- tation and reduction of cost in changing marine anodes, as the change can be made in a relatively short time by a diver without the ship needing to visit a yard or to be docked. The mounting itself of holder devices according to the invention possibly will require a docking of the ship; but then suc- ceeding changes can be made by a diver, possibly in a number of rounds, for example if a ferry in regular service is con¬ cerned. A very substantial advantage in the anode holder de¬ vice according to the invention is that one can avoid always having to remove the old anode carrier irons by flame cut- ting, that is, one avoids creating cutting scars in the clad¬ ding plates of the ship. For the very reason of avoiding such cutting scars in the ship's side one has up to now often cho¬ sen to let the old anode carrier irons remain in place on the ship's side, which is inappropriate as it is desirable that below the water line, the ship's side should be as smooth as possible.
With a view to facilitating the change work as much as pos¬ sible, the holder device according to the invention is prefe¬ rably arranged such that at one side of the steel body which is intended to be placed against the ships's side, the said hollow corresponds with a top side edge and an end edge, fac- ing the anode, of the steel body, and in that the hollow is formed with a funneled shape, as opposite of the said end ed¬ ge the hollow is formed with a side face which slopes down¬ ward from the said top side edge towards a preferably hori- 5 zontal limiting edge, and as opposing the side of the steel body which is intended to be placed against the ship's side, the hollow slopes downward/inward at least on a partial stretch from the said top side edge and down to the horizon¬ tal limiting edge.
10 In a simple way the holder device according to the invention can be arranged such that the said clamping means comprise a sturdy pointed screw which can be tightened, via a threaded bore from the front side of the steel body, against an end part of an anode carrier iron placed in the said hollow.
15 And with a view towards protecting the anode and diverting forces exerted for example by ice in the water, the holder device according to the invention can advantageously be sha¬ ped such that opposite the end edge which faces the anode, the steel body is shaped with a side face sloping in ward to-
20 ward the side of the steel body which is intended to be pla¬ ced against the ship's side.
In the following the invention will be more closely explained with reference to the drawing, wherein:-
Fig . 1 is a perspective view or illustrating a known way of 25 mounting an anode directly on the ship's side,
Fig. 2 is a corresponding perspective view of an embodiment of anode holder devices according to the invention, for example for mounting the anode shown in Fig. 1 on a ship's side, and
30 Fig. 3 is a perspective view of an anode holder device accor¬ ding to the invention, cf. Fig. 2. Fig. 1 shows a marine anode 2 as is known, consisting of an anode body 4 of zinc or of an alloy mainly of zinc wherein an anode carrier iron 6 consisting of a form-bent iron slab is mounted by embedding it in such a way that protruding end 5"parts 8 of the anode carrier iron 6 are flush with the back side of the marine anode 2, such that the latter can be moun¬ ted closely to a ship's side 10 by welding the end parts 8 onto it. The marine anode 2 as shown is intended for mounting on a straight side part of a vessel; but also curved marine 10 anodes are known for mounting on curved surfaces of ships.
Instead of welding it directly onto the ship's side 10, the marine anode 2 shown in Fig. 1 can - as shown in Fig. 2 be mounted in anode holders 12 which are welded onto the ship's side 10 beforehand at correct mutual distances. The anode
15 holders 12 are formed from steel and arranged to be welded onto the ship's side 10 with a sturdy circumferential weld - except for a corner area of the holder 12 where a hollow 14 is provided for receiving one of the end parts 8 of the anode carrier iron 6. The hollows 14 in the respective anode hol-
20 ders 12 are open upwardly along the ship's side 10, that is to say that it is quite easy to place the marine anode 2 in the holders 12 before the end parts 8 are efficiently clamped to the ship's side 10 and the anode holders 12, respectively, by means of sturdy pointed screws 16, such that an efficient
25 conductive connection is established between the ship's side 10 and the marine anode 2.
As shown in Fig. 3 the hollow 14 is double funnel-shaped as an end face 18 opposite the marine anode 2 slopes down from an upper side edge 20 from which a longitudinal surface part 30 22 slopes down as well, the surface part 22 passing into a face 24 which runs in parallel with a base surface 26 of the anode, that is also in parallel with the ship's side 10.
The anode holder 12 can be opened and closed by means of a sturdy hexagonal spanner as the sturdy pointed screw 16 is
35 preferably an UNBRAC0 pointed screw with a cutting edge. Finally it should be mentioned that the anode holder accord¬ ing to the invention is adapted for known marine anodes. In the future it is expected, however, that marine anodes for different purposes may advantageously be adapted to anode "holders according to the invention.

Claims

C A I M S :
1. A holder device for a marine anode which is mounted to ship's cladding plates to prevent or reduce their corrosion, by connection to the ship's side (10) of protruding end parts (8) of anode carrier irons (6) preferably embedded in the anode (2), c h a r a c t e r i z e d in that the holder device comprises a steel body (12) which is adapted to be welded onto the exterior of the ship's side (10), and which is shaped with a hollow (14) which is open to receive one of the said end parts (8) of the anode carrier iron (6), and in that, in connection with the said hollow (14), the holder de¬ vice comprises clamping means (16) which are arranged to retain the said end part (8) and to establish an efficient conductive connection between the said end part of the anode carrier iron (6) and the ship's side (10).
2. A holder device according to claim 1, c a r a c t e ¬ r i z e d in that, at one side of the steel body (12) which is intended to be placed against the ships's side (10), the said hollow (14) corresponds with a top side edge (20) and an end edge, facing the anode (2), of the steel body (12), and in that the hollow (14) is formed with a funneled shape, as opposite of the said end edge the hollow is formed with a si¬ de face (18) which slopes downward from the said top side ed¬ ge (2) towards a preferably horizontal limiting edge, and as opposing the side of the steel body which is intended to be placed against the ship's side (10), the hollow (14) slopes downward/ inward at least on a partial stretch from the said top side edge (20) and down to the horizontal limiting edge.
3. A holder device according to claim 1, c h a r a c t e - r i z e d in that the said clamping means comprise a sturdy pointed screw (16) which can be tightened, via a threaded bo¬ re (17) from the front side of the steel body, against an end part (8) of an anode carrier iron (6) placed in the said hol¬ low.
4. A holder device according to claim 1, c h a r a c t e ¬ r i z e d in that opposite the end edge which faces the ano¬ de (2), the hollow (14) is shaped with a sloping side face (18) and an upper, longitudinal sloping face (22).
EP90902166A 1989-01-11 1990-01-09 Holder device for marine anodes Expired - Lifetime EP0453486B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK012989A DK12989D0 (en) 1989-01-11 1989-01-11 HOLDER FOR SHIPPING ANODS
DK129/89 1989-01-11
PCT/DK1990/000006 WO1990008204A1 (en) 1989-01-11 1990-01-09 Holder device for marine anodes

Publications (2)

Publication Number Publication Date
EP0453486A1 true EP0453486A1 (en) 1991-10-30
EP0453486B1 EP0453486B1 (en) 1995-04-19

Family

ID=8090079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90902166A Expired - Lifetime EP0453486B1 (en) 1989-01-11 1990-01-09 Holder device for marine anodes

Country Status (5)

Country Link
EP (1) EP0453486B1 (en)
AU (1) AU4958290A (en)
DE (1) DE69018814T2 (en)
DK (2) DK12989D0 (en)
WO (1) WO1990008204A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1272001B (en) * 1993-03-10 1997-06-10 Agip Spa PERFECTED SACRIFICIAL ANODE FOR THE ANTI-CORROSIVE PROTECTION OF OFFSHORE STRUCTURES AND PROCEDURE FOR ITS CONSTRUCTION.
CN114475955A (en) * 2022-02-17 2022-05-13 山东创新精密科技有限公司 Aluminum alloy sacrificial anode anticorrosion mechanism for ship

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232857A (en) * 1962-08-17 1966-02-01 Bunker Hill Company Cathodic protection anode structure
US4038168A (en) * 1975-10-29 1977-07-26 Nakagawa Corrosion Protecting Co., Ltd. Galvanic anode type cathodic protection apparatus
GB1553813A (en) * 1976-06-01 1979-10-10 Isc Alloys Ltd Protection of ships and other structures against corrosion
US4191625A (en) * 1976-07-22 1980-03-04 Sabins Industries, Inc. Aluminum marine anode assembly with low resistance surface mountings
GB2118974A (en) * 1982-04-27 1983-11-09 Corrintec Uk Limited Module for an electrode

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9008204A1 *

Also Published As

Publication number Publication date
DK12989D0 (en) 1989-01-11
AU4958290A (en) 1990-08-13
DE69018814D1 (en) 1995-05-24
WO1990008204A1 (en) 1990-07-26
DE69018814T2 (en) 1995-12-07
EP0453486B1 (en) 1995-04-19
DK0453486T3 (en) 1995-09-04

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