Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP2739519B2 - Cathodic protection of sealing housing against bush supporting propeller shaft of ship - Google Patents
[go: Go Back, main page]

JP2739519B2 - Cathodic protection of sealing housing against bush supporting propeller shaft of ship - Google Patents

Cathodic protection of sealing housing against bush supporting propeller shaft of ship

Info

Publication number
JP2739519B2
JP2739519B2 JP2243688A JP24368890A JP2739519B2 JP 2739519 B2 JP2739519 B2 JP 2739519B2 JP 2243688 A JP2243688 A JP 2243688A JP 24368890 A JP24368890 A JP 24368890A JP 2739519 B2 JP2739519 B2 JP 2739519B2
Authority
JP
Japan
Prior art keywords
sacrificial anode
casing
propeller
cathodic protection
propeller shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2243688A
Other languages
Japanese (ja)
Other versions
JPH03150381A (en
Inventor
フォン ベルゲン エルンスト‐ペーター
ピーチュ ギュンター
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.)
SKF Marine GmbH
Original Assignee
Blohm and Voss Industries GmbH
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 Blohm and Voss Industries GmbH filed Critical Blohm and Voss Industries GmbH
Publication of JPH03150381A publication Critical patent/JPH03150381A/en
Application granted granted Critical
Publication of JP2739519B2 publication Critical patent/JP2739519B2/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
    • 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
    • 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

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)

Description

【発明の詳細な説明】 発明の属する技術分野 本発明は、船舶のプロペラシャフトを支持するブッシ
ュの周囲を包囲するシーリングハウジングの外側面を陰
極防食する装置であって、ブッシュのプロペラに対する
固定フランジに取り付けられた少なくとも１つの犠牲陽
極を備えた装置に関するものである。Description: TECHNICAL FIELD The present invention relates to an apparatus for cathodic protection of an outer surface of a sealing housing surrounding a bush supporting a propeller shaft of a marine vessel. An apparatus with at least one sacrificial anode attached.

従来の技術 従来の陰極防食装置、例えば、ドイツ国公開特許第25
20948号に記載の装置においては、複数個の犠牲陽極ブ
ロック材が、船舶のプロペラシャフトを支持するブッシ
ュのプロペラに対する固定フランジにボルトによって取
り付けられている。また、米国特許第3726779号に記載
の装置では、犠牲陽極アッセンブリーが、船舶のプロペ
ラシャフトに対する軸受の支柱の両側に配置され、犠牲
陽極アッセンブリーおよび支柱を貫通するボルトを締め
付けることによって支柱に取り付けられている。2. Description of the Related Art Conventional cathodic protection devices, for example, German Patent Publication No. 25
In the apparatus described in 20948, a plurality of sacrificial anode block members are bolted to a fixed flange for the propeller of a bush that supports the propeller shaft of the ship. Also, in the device described in U.S. Pat. I have.

かかる構成によれば、（それ自体意図された）犠牲陽
極の腐食が犠牲陽極と接触するボルトの頭部の領域にお
いてもまた引き起こされ、その結果、犠牲陽極の固定フ
ランジや支柱に対するボルト結合がもはや保証されなく
なり、陰極防食作用は相対的に短時間しか保証されな
い。With such an arrangement, corrosion of the sacrificial anode (as intended per se) is also caused in the region of the bolt head in contact with the sacrificial anode, so that the bolt connection of the sacrificial anode to the fixing flanges or struts is no longer possible It is no longer guaranteed, and the cathodic protection is only guaranteed for a relatively short time.

すなわち、犠牲陽極は、固定フランジや支柱の運動と
共にぐらつくようになり、場合によっては、不可避的に
発生する振動によって負荷を及ぼされ、砕けて脱落し、
あるいは割れて脱落してしまう。したがって、陰極防食
はもはや、犠牲陽極の自然消耗する時間よりも短い時間
までしか達成されず、犠牲陽極の寿命が実質的に短縮さ
れてしまうことになる。In other words, the sacrificial anode becomes wobble with the movement of the fixed flange and the strut, and in some cases, is loaded by the unavoidably generated vibration, and crushes and falls off,
Or they break and fall off. Therefore, cathodic protection is no longer achieved until less than the time that the sacrificial anode is naturally consumed, which substantially reduces the life of the sacrificial anode.

発明が解決しようとする課題 したがって、本発明の課題は、犠牲陽極の支持構造へ
の取り付け方法を改良し、犠牲陽極による陰極防食作用
が長時間保証されるようにすることである。Accordingly, an object of the present invention is to improve a method of attaching a sacrificial anode to a support structure so that the cathodic protection action of the sacrificial anode is guaranteed for a long time.

課題を解決するための手段 この課題は、本発明に基づいて、船舶のプロペラシャ
フトを支持するブッシュの周囲を包囲するシーリングハ
ウジングの外側面を陰極防食する装置であって、ブッシ
ュのプロペラに対する固定フランジに取り付けられた少
なくとも１つの犠牲陽極を備えた装置において、犠牲陽
極を実質上逆Ｕ字形の断面を有するケーシングの凹部に
保持し、ケーシングにおける逆Ｕ字形の一方の脚を形成
する側壁に設けられた下方にのびる舌片状延長部分を、
固定フランジとプロペラとの間に挟持させることによっ
て、犠牲陽極を固定フランジに取り付けたことを特徴と
する装置を構成することによって解決される。SUMMARY OF THE INVENTION According to the present invention, there is provided a device for cathodic protection of an outer surface of a sealing housing surrounding a bush supporting a propeller shaft of a marine vessel, comprising a fixing flange of the bush to the propeller. The at least one sacrificial anode attached to the casing, the sacrificial anode being retained in a recess of the casing having a substantially inverted U-shaped cross-section, provided on a side wall forming one of the legs of the inverted U-shape in the casing. Tongue-shaped extension extending downward
The problem is solved by constructing a device characterized in that the sacrificial anode is mounted on the fixed flange by being clamped between the fixed flange and the propeller.

上記の構成において、好ましくは、プロペラとケーシ
ングとの間に、耐塩水性を有しかつ電気絶縁性をもった
材料から形成されたパッキンが配置される。In the above configuration, preferably, a packing made of a material having salt water resistance and having electrical insulation is arranged between the propeller and the casing.

本発明によれば、犠牲陽極は、外部の海水に対して露
出する部分のみが海水の影響を受け、ケーシングによっ
て包囲された部分は保護される。そして、犠牲陽極とケ
ーシングは密着状態で接触しており、犠牲陽極とケーシ
ングとの接触面間への海水の侵入が防止され、犠牲陽極
がこの接触面から腐食することがなく、また、犠牲陽極
の固定フランジへの取付けは、ケーシングの舌片状延長
部分を固定フランジとプロペラとの間に挟持させること
によってなされる。こうして、犠牲陽極の固定フランジ
への取付けは、犠牲陽極を直接腐食させてしまうボルト
結合によらず係合結合によってなされるため、犠牲陽極
が緩んだり、あるいは割れて脱落するといったことが防
止される。According to the present invention, only the portion of the sacrificial anode that is exposed to external seawater is affected by seawater, and the portion surrounded by the casing is protected. The sacrificial anode and the casing are in close contact with each other, so that seawater is prevented from entering between the contact surfaces of the sacrificial anode and the casing, and the sacrificial anode does not corrode from this contact surface. Is mounted on the stationary flange by clamping the tongue-like extension of the casing between the stationary flange and the propeller. In this way, the attachment of the sacrificial anode to the fixing flange is performed by the engagement connection instead of the bolt connection that directly corrodes the sacrificial anode, so that the sacrificial anode is prevented from loosening or cracking and falling off. .

発明の実施の形態 図面は、本発明の実施例の概略的な縦断面図を示した
ものである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view of an embodiment of the present invention.

プロペラシャフト（１）が、ブッシュ（２）に支持さ
れている。ブッシュ（２）は、その海水側に面した端部
に通常の固定フランジ（６）を有している。さらに、こ
の固定フランジ（６）には、プロペラ（３）が図示され
ない固定手段によって固定されている。A propeller shaft (1) is supported by the bush (2). The bush (2) has a conventional fixing flange (6) at the end facing the seawater side. Further, the propeller (3) is fixed to the fixing flange (6) by fixing means (not shown).

プロペラシャフト（１）は、船首側軸受（４）内の図
示されない軸受ブッシュ内に支持されている。The propeller shaft (1) is supported in a bearing bush (not shown) in the bow-side bearing (4).

さらに、シーリングハウジング（５）がブッシュ
（２）を包囲して配置されている。この実施例では、シ
ーリングハウジング（５）は４つのハウジングリング
（5.1），（5.2），（5.3），（5.4）から構成されてお
り、各ハウジングリングの間には、それぞれ、弾性を有
するリップパッキン（9.1），（9.2），（9.3）が配置
されている。Furthermore, a sealing housing (5) is arranged surrounding the bush (2). In this embodiment, the sealing housing (5) is composed of four housing rings (5.1), (5.2), (5.3) and (5.4), each having an elastic lip between the housing rings. Packing (9.1), (9.2), (9.3) are arranged.

本発明による装置は、実質上逆Ｕ字形断面をもつケー
シング（10）を有している。ケーシング（10）の凹部に
は、犠牲陽極（８）が保持されている。この場合、犠牲
陽極（８）とケーシング（10）の凹部の内壁は、シール
された状態で結合している。ケーシング（10）における
逆Ｕ字形の一方の脚を形成する側壁には、下方にのびる
舌片状延長部分（10.1）が設けられている。The device according to the invention has a casing (10) having a substantially inverted U-shaped cross section. A sacrificial anode (8) is held in the recess of the casing (10). In this case, the sacrificial anode (8) and the inner wall of the recess of the casing (10) are connected in a sealed state. On the side wall of the casing (10) forming one of the legs of the inverted U-shape, a downwardly extending tongue-shaped extension (10.1) is provided.

ケーシング（10）の舌片状延長部分（10.1）は、ブッ
シュ（２）の固定フランジ（６）のプロペラ（３）との
間に挟持され、それによって、犠牲陽極（８）は、固定
フランジ（６）に取り付けられている。The tongue-like extension (10.1) of the casing (10) is clamped between the propeller (3) of the fixing flange (6) of the bush (2), whereby the sacrificial anode (8) is fixed to the fixing flange ( 6).

さらにこの実施例では、ケーシング（10）およびプロ
ペラ（３）の間には、耐塩水性を有し、かつ電気絶縁性
をもった材料から形成されたパッキン（７）が取付けら
れている。Further, in this embodiment, a packing (7) made of a material having salt water resistance and having electrical insulation is attached between the casing (10) and the propeller (3).

こうして、本発明による陰極防食装置によれば、犠牲
陽極（８）は、海水に対して露出する部分のみが海水の
影響を受け、ケーシング（10）によって包囲された部分
は保護される。そして、犠牲陽極（８）とケーシング
（10）は密着した状態で接触しており、犠牲陽極（８）
とケーシングとの接触面間への海水の侵入が防止され、
犠牲陽極（８）はこの接触面から腐食することがない。
さらには、犠牲陽極（８）の固定フランジ（６）への取
付けは、ケーシング（10）の舌片状延長部分（10.1）を
固定フランジ（６）とプロペラ（３）との間に挟持させ
ることによってなされる。その結果、犠牲陽極（８）の
固定フランジ（６）への取付けは、犠牲陽極（６）を直
接腐食させてしまうボルト結合によらず純然たる係合結
合によってなされ、よって、犠牲陽極が緩んだり、ある
いは割れて脱落するといったことが防止され、犠牲陽極
（８）によるシーリングハウジング（５）の外側面に対
する陰極防食作用が長時間保証される。Thus, according to the cathodic protection apparatus of the present invention, only the portion of the sacrificial anode (8) exposed to seawater is affected by seawater, and the portion surrounded by the casing (10) is protected. The sacrificial anode (8) and the casing (10) are in close contact with each other, and the sacrificial anode (8)
Seawater is prevented from entering between the contact surface between
The sacrificial anode (8) does not corrode from this contact surface.
Furthermore, the attachment of the sacrificial anode (8) to the fixing flange (6) is performed by clamping the tongue-like extension (10.1) of the casing (10) between the fixing flange (6) and the propeller (3). Done by As a result, the attachment of the sacrificial anode (8) to the fixing flange (6) is made by a purely engaging connection rather than by a bolt connection that directly erodes the sacrificial anode (6), so that the sacrificial anode may be loosened. , Or cracking and falling off, and the cathodic protection against the outer surface of the sealing housing (5) by the sacrificial anode (8) is guaranteed for a long time.

【図面の簡単な説明】 図面は、本発明の実施例の概略的な縦断面図である。 （１）……プロペラシャフト （２）……ブッシュ （３）……プロペラ （６）……固定フランジ （７）……パッキン （８）……犠牲陽極 （10）……ケーシング （10.1）……舌片状延長部分BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view of an embodiment of the present invention. (1) Propeller shaft (2) Bush (3) Propeller (6) Fixed flange (7) Packing (8) Sacrificial anode (10) Casing (10.1) Tongue extension

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実公 昭45−11745（ＪＰ，Ｙ１) 特公 昭52−42533（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken Sho 45-11745 (JP, Y1) Japanese Patent Publication Sho 52-42533 (JP, B2)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】船舶のプロペラシャフト（１）を支持する
ブッシュ（２）の周囲を包囲するシーリングハウジング
（５）の外側面を陰極防食する装置であって、前記ブッ
シュ（２）のプロペラ（３）に対する固定フランジ
（６）に取り付けられた少なくとも１つの犠牲陽極
（８）を備えた装置において、 前記犠牲陽極（８）を実質上逆Ｕ字形の断面を有するケ
ーシング（10）の凹部に保持し、前記ケーシング（10）
における前記逆Ｕ字形の一方の脚を形成する側壁に設け
られた下方にのびる舌片状延長部分（10.1）を、前記固
定フランジ（６）と前記プロペラ（３）との間に挟持さ
せることによって、前記犠牲陽極（８）を前記固定フラ
ンジ（６）に取り付けたことを特徴とする装置。An apparatus for cathodic protection of an outer surface of a sealing housing (5) surrounding a bush (2) supporting a propeller shaft (1) of a ship, wherein the propeller (3) of the bush (2) is provided. A) comprising at least one sacrificial anode (8) mounted on a fixing flange (6) for retaining said sacrificial anode (8) in a recess of a casing (10) having a substantially inverted U-shaped cross section. , The casing (10)
A downwardly extending tongue-shaped extension (10.1) provided on a side wall forming one of the legs of the inverted U-shape of the above (1) between the fixing flange (6) and the propeller (3). An apparatus wherein said sacrificial anode (8) is mounted on said fixed flange (6). 【請求項２】前記プロペラ（３）と前記ケーシング（1
0）との間に、耐塩水性を有しかつ電気絶縁性をもった
材料から形成されたパッキン（７）を有していることを
特徴とする請求項１に記載の装置。2. The casing (1) wherein said propeller (3) and said casing (1)
Device according to claim 1, characterized in that it has a packing (7) made of a material which is resistant to salt water and has electrical insulation properties.
JP2243688A 1989-09-14 1990-09-12 Cathodic protection of sealing housing against bush supporting propeller shaft of ship Expired - Lifetime JP2739519B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3930686.0 1989-09-14
DE3930686A DE3930686A1 (en) 1989-09-14 1989-09-14 Cathodic protection of ship parts - with sacrificial anode held in cage clamped between parts to avoid loosening of anode and possible disconnection

Publications (2)

Publication Number Publication Date
JPH03150381A JPH03150381A (en) 1991-06-26
JP2739519B2 true JP2739519B2 (en) 1998-04-15

Family

ID=6389399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2243688A Expired - Lifetime JP2739519B2 (en) 1989-09-14 1990-09-12 Cathodic protection of sealing housing against bush supporting propeller shaft of ship

Country Status (4)

Country Link
JP (1) JP2739519B2 (en)
KR (1) KR0180705B1 (en)
CN (1) CN1037457C (en)
DE (1) DE3930686A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG127687A1 (en) * 2002-12-19 2006-12-29 Beme Corrosion Internat As Ber Sacrificial anode and fastening device
RU2429158C1 (en) * 2010-06-10 2011-09-20 Министерство промышленности и торговли Российской Федерации (Минпромторг России) Corrosion protection system of marine propeller and propeller shaft of ship
CN104853985B (en) * 2012-12-03 2017-11-28 三星重工业有限公司 Ship propeller and its installation method and dismantling method
CN103060819A (en) * 2012-12-24 2013-04-24 青岛钢研纳克检测防护技术有限公司 Installing device of remote site type auxiliary anode
DE102013213853A1 (en) * 2013-07-16 2015-01-22 Aktiebolaget Skf Corrosion protected bearing component and bearing arrangement
CN103614729A (en) * 2013-11-14 2014-03-05 中国海洋石油总公司 Testing device and method for cathode protection of indoor ship body
FR3034827B1 (en) * 2015-04-09 2017-10-13 Skf Ab BEARING WITH SACRIFICIAL ANODE
CN115354333B (en) * 2022-08-31 2023-08-04 广船国际有限公司 Cathode protection device for marine shaft and ship

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726779A (en) * 1971-01-11 1973-04-10 J Morgan Marine anticorrosion anode structure
US3769926A (en) * 1971-10-18 1973-11-06 Motorola Inc Marine galvanic control circuit
JPS5819707B2 (en) * 1975-10-02 1983-04-19 電気化学工業株式会社 Niekigata Setuchiyakuzaisoseibutsu
US4089767A (en) * 1976-07-22 1978-05-16 Sabins Industries, Inc. Anode system for the cathodic protection of off shore structures
US4549949A (en) * 1984-06-07 1985-10-29 Outboard Marine Corporation Marine propulsion device including cathodic protection
DE3740679C2 (en) * 1987-12-01 1993-10-14 Blohm Voss Ag Device for cathodic corrosion protection of a component on a stern tube of a ship

Also Published As

Publication number Publication date
KR920006542A (en) 1992-04-27
DE3930686C2 (en) 1993-04-29
KR0180705B1 (en) 1999-02-18
DE3930686A1 (en) 1991-03-28
CN1037457C (en) 1998-02-18
CN1050228A (en) 1991-03-27
JPH03150381A (en) 1991-06-26

Similar Documents

Publication Publication Date Title
JP2739519B2 (en) Cathodic protection of sealing housing against bush supporting propeller shaft of ship
CA1246004A (en) Marine propulsion device including cathodic protection
CA1100908A (en) Aluminum marine anode with core activator
EP0240757B1 (en) Impressed current cathodic protection of off-shore platforms utilizing the tensioned anode ropes system
US4146448A (en) Protection of a stern tube shaft liner
JP3286536B2 (en) underwater pump
US2934485A (en) Device and its use for protecting elements against galvanic dissolution
US4409081A (en) Sacrificial anode
JP2003191891A (en) Propulsion unit
JP3334893B2 (en) Mounting device with internal combustion engine and engine base
JP2583792B2 (en) Apparatus for cathodic protection of stern tube seal structure of ship
US4468310A (en) Aluminum marine anode with core activator
KR20190125110A (en) Bridge support with corrosion abatement function
KR200180451Y1 (en) Zinc plate structure for corrsion prevention of ship
US3954593A (en) Method for attaching anode to electrolytic cell bottom and device therefore
US4191625A (en) Aluminum marine anode assembly with low resistance surface mountings
EP1509637B1 (en) A protecting device for metal structures
JP4641634B2 (en) Electric corrosion prevention structure of underwater rotating machine
RU2071438C1 (en) Propeller
CN111286741A (en) Floating type auxiliary anode mounting and fixing device
JP2002242874A (en) Electric corrosion prevention structure for underwater rotating machinery
JP2011105273A (en) Anode anti-corrosion unit of engine for outboard motor
RU2045121C1 (en) Bearing shield of electric motor
KR20090061736A (en) Rope Guard
RU2066659C1 (en) Controllable-pitch propeller

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080123

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090123

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100123

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100123

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110123

Year of fee payment: 13

EXPY Cancellation because of completion of term
FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110123

Year of fee payment: 13