WO2005073531A1 - Well cooler - Google Patents
Well cooler Download PDFInfo
- Publication number
- WO2005073531A1 WO2005073531A1 PCT/NL2004/000885 NL2004000885W WO2005073531A1 WO 2005073531 A1 WO2005073531 A1 WO 2005073531A1 NL 2004000885 W NL2004000885 W NL 2004000885W WO 2005073531 A1 WO2005073531 A1 WO 2005073531A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- well
- ship
- outboard water
- well cooler
- cooler
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
- F01P3/207—Cooling circuits not specific to a single part of engine or machine liquid-to-liquid heat-exchanging relative to marine vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
-
- 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
- C23F13/10—Electrodes characterised by the structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/022—Heat exchangers immersed in a large body of liquid for immersion in a natural body of water, e.g. marine radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/004—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using protective electric currents, voltages, cathodes, anodes, electric short-circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
-
- 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
- C23F2213/10—Controlling or regulating parameters
- C23F2213/11—Controlling or regulating parameters for structures subject to stray currents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
- F01P2011/066—Combating corrosion
Definitions
- the invention relates to a well cooler for cooling a cooling medium of a driving unit on a ship, such as a marine motor, by means of outboard water, which well cooler can be placed in a well space present in the ship, which lies at least partially below the outboard water level and which is in open communication with the outboard water, the well cooler comprising at least one cooling element for the cooling medium, which extends into the well space and which is surrounded by outboard water during operation, and the ship furthermore being provided with a cathodic corrosion protection system.
- Well coolers of the above kind have been known for quite some time already, they are used in particular for cooling marine motors, such as propulsion motors, generator motors, pump motors and auxiliary motors, which are generally present on a ship.
- the outboard water as a continuously supplied coolant for the cooling medium (motor water) of the various driving units that makes such a well cooler functional.
- the outboard water enters the well space via an opening and flows round the cooling element of the well cooler.
- the hot cooling medium of the driving unit is passed through the cooling element and cooled by the outboard water through heat transfer.
- the cooled-down cooling medium is returned to the driving unit, whilst the outboard water can exit the well space via another opening.
- an upward outboard water flow occurs in the well space.
- the inlet opening(s) and the outlet opening(s) for the outboard water in the well space are usually provided at different levels in the wall of the well space.
- a generally known phenomenon with ships is their susceptibility to fouling by algae and other aquatic organisms, such as cockles and mussels, on those parts of the ship in that are in contact with the outboard water.
- the hulls of most ships are provided with an antifouling coating. If said antifouling coating gets damaged, local corrosion will occur on the ship's hull at the places where the coating is damaged.
- a cathodic corrosion protection system is used.
- the cooling element which is disposed in the outboard water, is in principle susceptible to fouling by algae, which in time affects the cooling efficiency of the well cooler.
- the well cooler In order to achieve this effect, the well cooler must be mounted in such a manner that it is completely insulated from the ship's hull. This makes the well cooler more susceptible to corrosion caused by stray currents in general, however, which stray currents may or may not be caused by the cathodic corrosion protection system with which the ship is provided.
- the main cause of the increased risk of attack is the fact that a well cooler has a relatively vast heat-exchanging area made up of a bright or uncoated metal surface in a conductive medium.
- the object of the invention is to provide a well cooler of the above kind which exhibits an effective cooling efficiency, which is hardly susceptible to biological growth, if at all, in the long run and which is not affected by stray current corrosion, which reduces the life span of the well cooler.
- the well cooler is provided with means that prevent the cooling element from being affected by stray current corrosion.
- said means are accommodated in the well space, more specifically, said means surround the cooling element at least partially.
- said means are at least partially pervious to the outboard water so as not to affect or impede the cooling action of the well cooler. More specifically, said means are made of an electrically conductive material. It has become apparent that the cooling element can be prevented from being affected by stray current corrosion in a very effective manner in that, in a special embodiment of the invention, said means are formed by a metal mesh. In a special embodiment, said means are electrically insulated from the electric corrosion protection system, whilst in another embodiment said means are electrically connected to the electric corrosion protection system. In both embodiments an effective protection of the cooling element against stray current corrosion is obtained, whilst in the latter embodiment also the stray currents passing through the outboard water are effectively discharged to earth.
- Fig. 1 is a schematic, sectional view of a ship provided with a well cooler according to the prior art; Fig.
- FIG. 2 is a more detail view of a well cooler according to the prior art
- Fig. 3 schematically shows the effects caused by a cathodic corrosion protection system used with a well cooler according to the prior art
- Fig. 4 shows a first embodiment of a well cooler according to the invention
- Fig. 5 shows a second embodiment of a well cooler according to the invention
- Fig. 6 shows a test setup for testing the effects caused by a cathodic corrosion protection system used with a well cooler according to the prior art and with a well cooler according to the invention
- Fig. 7 shows a table with measuring results obtained with the test setup of Fig. 6.
- the ship 1 shows a ship provided with a well cooler that is known from the prior art.
- the ship 1 has a closed well space 2 within the ship's hull la, which space is in open communication with the outboard water 8 via one or more inlet openings 7a and outlet openings 7b.
- a well cooler 3 can be placed in the well space 2 via an opening 3a, which opening can be closed by means of a pipe plate 6.
- a known embodiment of a well cooler according to the prior art is shown in Fig. 2.
- the known well cooler 3 is provided with a cooling element 4 that is built up of a large number of a vertically disposed bundle pipes 5. Said bundle pipes 5 are fixed in the pipe plate is 6 with their one end 5a as well as with their other end 5b.
- the pipe plate 6 is provided with an inlet 7a and an outlet 7b for a cooling medium (cooling water) for a driving unit of the ship.
- the term driving unit as used herein is understood to include propulsion motors, generator motors, pump motors and auxiliary motors that can be used on a ship. Since such driving units are generally operated at full power on a ship, it is essential that said driving units be adequately cooled. To that end the cooling medium (cooling water) having a high operating temperature is carried into the bundle pipes 5 via the inlet 7a and said one ends 5a. The cooling medium is pumped through the bundle pipes 5 in the direction of the other ends 5b and the outlet 7b, after which it is returned to the driving unit.
- the outboard water 8 present in the well space 2 flows round the vertically disposed bundle pipes 5.
- the difference in temperature that generally prevails between the hotter cooling medium in the bundle pipes 5 and the outboard water results in heat being transferred to the outboard water, which is thus heated up.
- the hotter cooling medium that flows through the bundle pipes 5 is cooled down and subsequently the cooled-down cooling medium exits the well cooler 3 in the direction of the driving unit via the outlet 7b.
- the heated outboard water moves upward during said process, resulting in an upward convection current of outboard water in the well space 2.
- the inlet openings 2a and the outlet openings 2b are provided at different levels in the ship's hull, with the outlet openings 2b being positioned at a higher level, closer to the outboard water level.
- an upward flow of entering outboard water 8a (having a low temperature) and an exiting flow of outboard water 8b (having a higher temperature) is created in the well space 2 during operation.
- the flow of the outboard water 8 through the well space 2 is forced while the ship is sailing.
- the well cooler 3 is furthermore provided with horizontally extending supporting plates 9, which interconnect the bundle pipes 5.
- the horizontally extending supporting plates 9 form an obstacle to the upward flow of outboard water created by heat convection.
- a generally known phenomenon that occurs with ships is their susceptibility to fouling by algae and other water organisms, such as cockles and mussels, on those parts of the ship that are in contact with the outboard water.
- the hull of most ships is provided with an antifouling coating.
- a passive corrosion protection system consists of a calculated number of anodes (e.g. of zinc or aluminium), which are mounted in metallic contact with the ship's hull.
- An active cathodic corrosion protection system comprises an external current or voltage source between a cathode and an anode, which creates an external potential field around the ship. Said external potential field is also present in the outboard water, so that a (weak) electrical current will start to flow through the outboard water under the influence of ionic flux. Said current enters the ship via the locally damaged spots in the antifouling coating. Since the ship's hull is electrically connected to the active cathodic corrosion protection system, the active cathodic corrosion protection system prevents the occurrence of local corrosion at the specific damaged locations where the induced current enters the ship's hull.
- the cooling element 4 with a protective and insulating coating on the outboard water side in combination with a system consisting of electrically activated copper bars. Said bars slowly dissolve, creating a toxic environment for biological organisms around the coated bundle pipes.
- the protecting and insulating coating has a strongly adverse effect on the transfer of heat from the hotter cooling medium to the colder outboard water, which in turn has an adverse effect on the cooling efficiency.
- the protecting and insulating coating reduces the surface temperature of the bundle pipes, as a result of which said bundle pipes are more susceptible to possible fouling by biological organisms.
- a better protection against fouling on the cooling element 4 (the bundle pipes 5) by algae etc can be achieved by making the cooling element 4 of a material that has a natural resistance against fouling by biological organisms (such as CuNilOFe) and which completely insulates the well cooler 3 electrically from the rest of the ship.
- biological organisms such as CuNilOFe
- this electrically insulated arrangement of the well cooler 3 with respect to the rest of the ship, including the cathodic corrosion protection system strongly reduces the extent of fouling by algae etc, the cooling element 4, and more in particular the large number of bundle pipes 5, are confronted with a different form of corrosion, viz. stray current corrosion.
- Stray current corrosion is a form of local corrosion on a part of the ship, which is caused by the transfer of charge at the interface between the material and its environment as a result of the presence of an external current or voltage source or by an externally generated potential field, for example the external potential field generated by a cathodic corrosion protection system.
- the phenomenon of "stray current corrosion" will now be explained with reference to Fig. 3.
- Fig. 3 shows a vessel filled with outboard water 8 which, figuratively speaking, represents the sea.
- the positive electrode 11 (anode) and the negative electrode 12 (cathode) are connected to a cathodic corrosion protection system 10 via respective connections 11a- 12a. This system 10 creates an external potential field 13 in the outboard water 8 between the electrodes 11 and 12.
- Reference numeral 4 schematically indicates the cooling element 4 of a well cooler 3, which cooling element 4 is accommodated in a well space 2, being completely insulated electrically from the ship and the cathodic corrosion protection system, with outboard water 8 flowing all around the cooling element.
- Part of the flow of charge between the electrodes 11 and 12, which usually takes place via the outboard water (sea water) as a result of ionic flux, will now take place via the metal of the electrically insulated cooling element 4.
- Said outflux of ions leads to oxidation reactions, which can take place in that the potential of the outboard water 8 directly at the metal surface, at the location indicated B in Fig. 3, is (much) lower than the potential of the metal material.
- the oxidation reaction that takes place substantially at the metal surface is the oxidation of the material in accordance with the following reaction equation (3): M - M n+ + n e " (3)
- metal ions dissolve from the metal surface into the outboard water 8.
- the metal surface dissolves, as it were: the metal surface is attacked by corrosion.
- the flow of charge takes place in the direction of the electrode 12, again by ionic flux.
- the metal parts that are electrically insulated from the cathodic corrosion protection system and that are placed in said potential field are subject to very rapid attack by stray current corrosion.
- the ship, and more in particular the known well cooler is provided with means which prevent this attack by stray current corrosion.
- a first embodiment is shown in Fig. 4, in which the means that prevent attack of the cooling element 4 by stray current corrosion are indicated by numeral 14.
- said means 14 are accommodated in the well space 2, surrounding the cooling element 4 at least partially.
- the means 14 are at least partially pervious to the outboard water 8.
- the means 14 are in particular made of an electrically conductive material, more in particular of a metal mesh that surrounds the cooling element 4.
- Said mesh 14 functions as an electrical screen, which prevents the influx of ions into the metal of the cooling element 4 as a result of the presence of the generated external potential field between the positive electrode 11 and the negative electrode 12 of the cathodic corrosion protection system 10.
- FIG. 5 shows another embodiment, in which the metal mesh 14 that fully surrounds the cooling element 4, which is electrically insulated from the ship, is furthermore electrically connected to the cathodic corrosion protection system 10 of the ship by means of an electrical connection 14a.
- the potential differences across the metal surface of the cooling element 4 are strongly reduced as a result of the provision of a metal mesh 14 around the cooling element 4.
- no stray current can be induced in the metal of the cooling element 4, and no stray current can exit the metal in the direction of the negative electrode 12 near a point B, therefore.
- the means which, according to the invention, prevent the cooling element 4 from attack by stray current corrosion consist of a cylindrical or tubular envelope, which can be provided round the cooling element 4 and which is closed by a metal mesh at both ends.
- the well space 2 is schematically formed by a cylindrical tube portion la, which represents the ship's hull la.
- the two short open ends of the cylindrical tube portion la form the inlet opening 7a and the outlet opening 7b, respectively, for the outboard water 8.
- the two inlet and outlet openings 7a-7b are closed by means of a metal mesh 14a-14b.
- the cathodic corrosion protection system 10 applies an external potential field by means of the positive electrode 11 (anode) and the negative electrode 12 (cathode).
- the potential field applied between the two electrodes 11 halves and 12 can be measured by means of voltage meter V 2 .
- Two metal elements are placed in the tube portion la, which elements are electrically insulated from the rest of the setup.
- the two metal parts 4a-4b are interconnected by means of a current meter A,.
- Contact electrodes 16a-16b are furthermore disposed in the tube portion la that functions as the well space 2, which contact electrodes are interconnected by means of a volt meter V,.
- the two metal meshes 14a-14b are electrically interconnected by means of a connection 18 and, in addition to that, they may be electrically connected to or be insulated from the cathodic corrosion protection system 10-11-12 by means of a switch 17.
- a number of measurements have been carried out for various situations.
- an electrical potential field is realised between the positive electrode (anode) 11 and the negative electrode (cathode) 12, wherein the potential differences across the well space 2 (the tube portion la) can be measured by means of the contact electrodes 15a-15b and the volt meter V 2 .
- the electrical potential field was increased from 0 to 1000 mV in steps of 100 mV.
- the switch 17 When the switch 17 is open, i.e. the situation in which the screening means 14a-14b are not connected to the cathodic corrosion protection system 10 (indicated “disconnected"), higher potential differences are measured between the contact electrodes 16a-16b in the tube portion la than in the situation in which the switch 17 is closed and the screening means 14a-14b are electrically connected to the cathodic corrosion protection system 10.
- the screening means are formed by a mesh finer than the mesh used in the second and third measurements. Similar measuring results are obtained in the disconnected situation (open switch 17) and in the connected situation (closed switch 17), i.e.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Packages (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04808801A EP1700015B1 (en) | 2003-12-19 | 2004-12-17 | Well cooler |
US10/583,471 US20070144893A1 (en) | 2003-12-19 | 2004-12-17 | Well cooler |
DE602004013373T DE602004013373T2 (en) | 2003-12-19 | 2004-12-17 | COOLER FOR USE IN AN EXTERNAL SKIN BAG |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1025078A NL1025078C2 (en) | 2003-12-19 | 2003-12-19 | Bin cooler. |
NL1025078 | 2003-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005073531A1 true WO2005073531A1 (en) | 2005-08-11 |
Family
ID=34825238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2004/000885 WO2005073531A1 (en) | 2003-12-19 | 2004-12-17 | Well cooler |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070144893A1 (en) |
EP (1) | EP1700015B1 (en) |
AT (1) | ATE393304T1 (en) |
DE (1) | DE602004013373T2 (en) |
NL (1) | NL1025078C2 (en) |
WO (1) | WO2005073531A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1032531C2 (en) * | 2006-09-18 | 2008-03-19 | Materiaal Metingen Europ B V | Method and system for controlling biological fouling on a bin cooler placed in a compartment; assembly of a bin cooler and such a system; vessel provided with such an assembly; and method for installing such a system. |
US10330389B2 (en) * | 2014-12-12 | 2019-06-25 | Koninklijke Philips N.V. | Cooling apparatus for cooling a fluid by means of surface water |
RU2017142095A (en) * | 2015-05-06 | 2019-06-06 | Конинклейке Филипс Н.В. | KNOTTING CONTAINING OBJECT, HAVING A SURFACE, WHICH IS INTENDED FOR EXPOSURE TO WATER, AND THE PROTECTION SYSTEM AGAINST GROWTH |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58217681A (en) * | 1982-06-10 | 1983-12-17 | Nippon Kokan Kk <Nkk> | Method for preventing corrosion and staining of sea water introducing arranged pipe |
JPH06255578A (en) * | 1993-03-04 | 1994-09-13 | Ichiro Yamazaki | Electrolytic corrosion preventing device for hull |
JP2000281176A (en) * | 1999-03-26 | 2000-10-10 | Morimatsu Sogo Kenkyusho:Kk | Electric corrosion preventing structure for underground tank |
WO2001025086A1 (en) * | 1999-10-06 | 2001-04-12 | Bloksma B.V. | Cooling apparatus |
US6261439B1 (en) * | 1998-10-30 | 2001-07-17 | Robert J. Schwabe | Cathodic protection system for mitigating stray electric current effects |
EP1233159A1 (en) * | 2001-02-19 | 2002-08-21 | Bloksma B.V. | Cooling apparatus for a ships motor |
-
2003
- 2003-12-19 NL NL1025078A patent/NL1025078C2/en not_active IP Right Cessation
-
2004
- 2004-12-17 EP EP04808801A patent/EP1700015B1/en not_active Not-in-force
- 2004-12-17 AT AT04808801T patent/ATE393304T1/en not_active IP Right Cessation
- 2004-12-17 US US10/583,471 patent/US20070144893A1/en not_active Abandoned
- 2004-12-17 DE DE602004013373T patent/DE602004013373T2/en active Active
- 2004-12-17 WO PCT/NL2004/000885 patent/WO2005073531A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58217681A (en) * | 1982-06-10 | 1983-12-17 | Nippon Kokan Kk <Nkk> | Method for preventing corrosion and staining of sea water introducing arranged pipe |
JPH06255578A (en) * | 1993-03-04 | 1994-09-13 | Ichiro Yamazaki | Electrolytic corrosion preventing device for hull |
US6261439B1 (en) * | 1998-10-30 | 2001-07-17 | Robert J. Schwabe | Cathodic protection system for mitigating stray electric current effects |
JP2000281176A (en) * | 1999-03-26 | 2000-10-10 | Morimatsu Sogo Kenkyusho:Kk | Electric corrosion preventing structure for underground tank |
WO2001025086A1 (en) * | 1999-10-06 | 2001-04-12 | Bloksma B.V. | Cooling apparatus |
EP1233159A1 (en) * | 2001-02-19 | 2002-08-21 | Bloksma B.V. | Cooling apparatus for a ships motor |
Non-Patent Citations (8)
Title |
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NN.: "Copper-nickel alloys, properties and applications (TN 30)", STAINLESS STEEL WORLD, September 1982 (1982-09-01), XP002294405, Retrieved from the Internet <URL:http://www.stainless-steel-world.net/pdf/12007.pdf> [retrieved on 20040827] * |
NN.: "Corrosion Basics", XP002294409, Retrieved from the Internet <URL:http://home.zonnet.nl/sonkej/corrosion/htm/basics.htm> [retrieved on 20040827] * |
NN.: "Zwerfstroomcorrosie", XP002294407, Retrieved from the Internet <URL:http://home.zonnet.nl/sonkej/corrosion/htm/zwerfstroomcorrosie/zwerfstroomcorrosie.pdf> [retrieved on 20040827] * |
PATENT ABSTRACTS OF JAPAN vol. 0080, no. 67 (C - 216) 29 March 1984 (1984-03-29) * |
PATENT ABSTRACTS OF JAPAN vol. 0186, no. 55 (M - 1721) 12 December 1994 (1994-12-12) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 13 5 February 2001 (2001-02-05) * |
SONKE HANS & WILMS MARC: "Scheepstank pest - Microbiele corrosie leidth tot perforatie ballasttanks", XP002294406, Retrieved from the Internet <URL:http://home.zonnet.nl/sonkej/corrosion/htm/microbielecorrosie/artikelmic.pdf> [retrieved on 20040827] * |
TULLMIN M: "Stray Current Corrosion - Basic theory", 2001, XP002294408, Retrieved from the Internet <URL:http://www.corrosion-club.com/sttheory.htm> [retrieved on 20040827] * |
Also Published As
Publication number | Publication date |
---|---|
DE602004013373T2 (en) | 2009-05-28 |
DE602004013373D1 (en) | 2008-06-05 |
EP1700015A1 (en) | 2006-09-13 |
NL1025078C2 (en) | 2005-06-21 |
US20070144893A1 (en) | 2007-06-28 |
ATE393304T1 (en) | 2008-05-15 |
EP1700015B1 (en) | 2008-04-23 |
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