CN1049533A - Be immersed in metal covering in the seawater liquid electrolyte preferably, the cathodic protection device on the stern tube sealing member of ship preferably - Google Patents
Be immersed in metal covering in the seawater liquid electrolyte preferably, the cathodic protection device on the stern tube sealing member of ship preferably Download PDFInfo
- Publication number
- CN1049533A CN1049533A CN90104764A CN90104764A CN1049533A CN 1049533 A CN1049533 A CN 1049533A CN 90104764 A CN90104764 A CN 90104764A CN 90104764 A CN90104764 A CN 90104764A CN 1049533 A CN1049533 A CN 1049533A
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- China
- Prior art keywords
- outer cover
- consumable anode
- anode
- work
- open
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Classifications
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Sealing Devices (AREA)
Abstract
Be dipped in the metal covering in the seawater liquid electrolyte preferably, the cathodic protection device on the stern tube sealing member of ship preferably, by at least one consumable anode, and be fixed on respect to this electrolyte flow faster on the member, it is characterized in that, use one to surround consumable anode, preferably and the outer cover of its electrical isolation, enclosure wall is kept at a distance with this consumable anode in a side scope of consumable anode at least, and be provided with electrolytical open-work, hank in the clear span surface, inside of the distance of enclosure wall and consumable anode and/or open-work, when outer cover rotates together with consumable anode, make electrolyte flow speed be not more than 0.3 meter per second in outer cover inside.
Description
The present invention relates to a kind of metal covering in the seawater liquid electrolyte preferably, cathodic protection device on the stern tube sealing member of ship preferably of being immersed in, be fixed on respect to this electrolyte flow by means of at least one consumable anode and this consumable anode and faster on the member, preferably be fixed on the screwshaft of a ship.
This class device is disclosed by German prospectus DE-OS 2520948 and US Patent specification US-PS 3726779; cathodic protection only can guarantee that the short time is effective; because be fixed on the anode on the rapid movement parts; because electrolytical on every side violent flowing; the electric current that sends is very big, therefore need provide protection to the metal covering that must protect.
In strong mobile medium, this electric current maximum can be brought up to 15 times, so that therefore anode exhausts very soon.
In this known system, as if being example with the zinc anode, the protection period of making every effort to is 4 years, and this just need must dispose 163 kilograms consumable anode on the metal covering of protection at each square metre.
These materials are usually for locational reason rather than be placed on the said surface, and also, this protection can only guarantee that the short time is effective.Most when anode consumption, relevant device will stop, and need change new anode.
This is influential especially for ship, and the stern tube sealing should protect with negative electrode on the ship, has the outer cover of consumable anode and the chromium steel sleeve of sealing member and rotates together, and this is disadvantageous, because ship must docking later on.If this cathodic protection is impossible, must consider corrosion and cancellation stern tube sealing member on the chromium steel sleeve.
In addition, practice shows that the chromium steel sleeve is very debatable to the insulation of water screw.Therefore, consumable anode is at least also protected and is in the water screw district under the anchor cable guard shield in the seal area, that is, work-ing life of consumable anode thereby further shortened.
Task of the present invention is, on existing, cathodic protection device by means of at least one consumable anode, suppresses electric current like this, although ionogen has high velocity of flow in the outer cover outside, makes still to reach about 4 years the work-ing life of desired consumable anode.
Task of the present invention obtained solution by using an outer cover: this outer cover be surround consumable anode to this anode electrical isolation preferably then, enclosure wall is kept at a distance with this consumable anode in a side scope of consumable anode at least, and be provided with electrolytical open-work at this place, at this moment, being provided with the enclosure wall of open-work and the distance and/or the inner clear span of the open-work surface of consumable anode hanks, when outer cover is done to meet the motion of technical qualification together with consumable anode, when preferably rotating, make electrolytical velocity of flow be not more than 0.3 meter per second in outer cover inside.
Though it is known by German patent specification DE-PS 1182929, a consumable anode must surround with an outer cover, this outer cover and consumable anode are electrical isolations, and its enclosure wall must be kept at a distance with this consumable anode in lateral scope of consumable anode, and must be provided with electrolytical open-work there, yet, the situation of this known devices is, there is not or only has more small relative movement at the outer cover that consumable anode is housed with around between its ionogen, therefore, only need suppress electric current fiddling.
In addition; it is encapsulated in the outer cover, keeps at a distance and antetheca perforation all is for following purpose: before being subjected to corrosion and mechanical stress; allow consume negative electrode and go protection, rather than resemble and go to reduce in the lip-deep velocity of flow of consumable anode the theme of the present invention by seawater.
A favourable scheme of the present invention is, on the ship of a bearing housing that has a screwshaft, the restraint location of consumable anode outer cover is on the sealing member chromium steel telescopic ring flange.
According to the used outer cover of the present invention is that metal constitutes, and to consuming the interlayer generation that the anodic electrical isolation is done by an electricity consumption Insulation Material.Outer cover also can be by the electrical isolation material, preferably plastics constitute, and these plastics constitute simultaneously to consuming the anodic electrical isolation.
When outer cover was made the rectangular parallelepiped pattern, the interval that is provided with the enclosure wall of open-work was equivalent to the about 30% of outer cover height overall, the inside clear span total area of open-work be provided with open-work the outer cover backplate about 30%.
Can be fixed on the water screw or be fixed on the cylindrical jacket cartridge unit according to consumable anode of the present invention, also can be fixed on the sealing member outer cover.
By means of accompanying drawing one embodiment of the present of invention are further described now, wherein
Fig. 1 represents a vertical section by sealed structure, and this structure has a consumable anode that is fixed on the sleeve.
Fig. 2 represents a section by absorbing component/anode outer cover.
Stern tube sealing member shown in Figure 1 has an axle sleeve 2 to be on the axle 1.Axle 1 is to be bearing in the bearing housing 3 of a stern bossing 4, is fixed with sealing member outer cover 5 on stern bossing, and the sealing member outer cover is made up of several cam rings and several sealed circle 6.Be fixed with a consumable anode 7 on the axle sleeve 2, consumable anode then is in the outer cover 8.Outer cover 8 is to make to make fluid can not change the anodic electric current.
Claims (8)
1, be immersed in the metal covering in the seawater liquid electrolyte preferably, the cathodic protection device on the stern tube sealing member of ship preferably, by means of at least one consumable anode, this consumable anode is fixed on respect to this electrolyte flow faster on the member, preferably be fixed on the screwshaft of a ship, it is characterized in that, use one to surround consumable anode, best and this consumable anode is the outer cover of electrical isolation, enclosure wall is kept at a distance with this consumable anode in a side scope of consumable anode at least, and be provided with electrolytical open-work at this place, at this moment, being provided with the enclosure wall of open-work and the distance of consumable anode and/or the clear span surface, inside of open-work hanks, when outer cover is done the motion of symbol technical qualification together with consumable anode, when preferably rotating, make electrolytical velocity of flow be not more than 0.3 meter per second in outer cover inside.
According to the said device of claim 1, it is characterized in that 2, on the ship of a bearing housing that has a screwshaft, the restraint location of consumable anode outer cover is on the sealing member chromium steel telescopic ring flange.
3, according to claim 1 or 2 said devices, it is characterized in that outer cover is made of metal, and to consuming the interlayer generation that the anodic electrical isolation is done by an electricity consumption Insulation Material.
According to claim 1 or 2 said devices, it is characterized in that 4, outer cover is by the electrical isolation material, preferably plastics constitute, these plastics constitute simultaneously to consuming the anodic electrical isolation.
5, according to each said device in the claim 1 to 3, it is characterized in that, when outer cover is made the rectangular parallelepiped pattern, be provided with open-work enclosure wall be the about 30% of outer cover height overall at interval, the inside clear span total area of open-work be provided with open-work the outer cover backplate about 30%.
6, according to each said device in the claim 1 to 5, it is characterized in that anode is fixed on the water screw.
7, according to each said device in the claim 1 to 5, it is characterized in that anode is fixed on the cylindrical jacket cartridge unit.
8, according to each said device in the claim 1 to 5, it is characterized in that anode is fixed on the sealing member outer cover.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3924158.0 | 1989-07-21 | ||
| DE3924158A DE3924158A1 (en) | 1989-07-21 | 1989-07-21 | DEVICE FOR CATHODICAL CORROSION PROTECTION OF IN A LIQUID ELECTROLYTE, PREFERABLY SEAWATER, SUBMERSIBLE METAL AREAS, PREFERABLY ON THE STEVEN PIPE SEAL OF A SHIP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1049533A true CN1049533A (en) | 1991-02-27 |
Family
ID=6385540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90104764A Pending CN1049533A (en) | 1989-07-21 | 1990-07-21 | Be immersed in metal covering in the seawater liquid electrolyte preferably, the cathodic protection device on the stern tube sealing member of ship preferably |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH03104890A (en) |
| KR (1) | KR910003153A (en) |
| CN (1) | CN1049533A (en) |
| DE (1) | DE3924158A1 (en) |
| GB (1) | GB2233981B (en) |
| NL (1) | NL9001663A (en) |
| SE (1) | SE9002368L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905913A (en) * | 2010-07-29 | 2010-12-08 | 中国船舶重工集团公司第七二五研究所 | Propeller shore-based electrolytic seawater antifouling system and method |
| CN114131126A (en) * | 2021-11-14 | 2022-03-04 | 中国航发沈阳黎明航空发动机有限责任公司 | Flow field protection device for large-allowance electrolytic machining |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100460044B1 (en) * | 2002-09-09 | 2004-12-04 | 윌로펌프 주식회사 | Water supplying pump for seawater |
| DE102013213853A1 (en) * | 2013-07-16 | 2015-01-22 | Aktiebolaget Skf | Corrosion protected bearing component and bearing arrangement |
| CN114901869B (en) * | 2019-10-18 | 2023-12-22 | 沃尔沃遍达公司 | Cathodic protection and anti-fouling device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146448A (en) * | 1974-07-31 | 1979-03-27 | Kobe Steel, Limited | Protection of a stern tube shaft liner |
| US4133737A (en) * | 1977-06-27 | 1979-01-09 | Exxon Research & Engineering Co. | Shielded anodes |
-
1989
- 1989-07-21 DE DE3924158A patent/DE3924158A1/en not_active Ceased
-
1990
- 1990-07-05 SE SE9002368A patent/SE9002368L/en not_active Application Discontinuation
- 1990-07-09 JP JP2183856A patent/JPH03104890A/en active Pending
- 1990-07-17 GB GB9015716A patent/GB2233981B/en not_active Expired - Fee Related
- 1990-07-20 NL NL9001663A patent/NL9001663A/en not_active Application Discontinuation
- 1990-07-21 CN CN90104764A patent/CN1049533A/en active Pending
- 1990-07-21 KR KR1019900011135A patent/KR910003153A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905913A (en) * | 2010-07-29 | 2010-12-08 | 中国船舶重工集团公司第七二五研究所 | Propeller shore-based electrolytic seawater antifouling system and method |
| CN114131126A (en) * | 2021-11-14 | 2022-03-04 | 中国航发沈阳黎明航空发动机有限责任公司 | Flow field protection device for large-allowance electrolytic machining |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9015716D0 (en) | 1990-09-05 |
| SE9002368L (en) | 1991-01-22 |
| KR910003153A (en) | 1991-02-27 |
| GB2233981B (en) | 1993-09-01 |
| NL9001663A (en) | 1991-02-18 |
| SE9002368D0 (en) | 1990-07-05 |
| GB2233981A (en) | 1991-01-23 |
| JPH03104890A (en) | 1991-05-01 |
| DE3924158A1 (en) | 1991-01-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |