JPH03186498A - Stain preventing/corrosion preventing method for hull outer plate in contact with sea water - Google Patents
Stain preventing/corrosion preventing method for hull outer plate in contact with sea waterInfo
- Publication number
- JPH03186498A JPH03186498A JP32422389A JP32422389A JPH03186498A JP H03186498 A JPH03186498 A JP H03186498A JP 32422389 A JP32422389 A JP 32422389A JP 32422389 A JP32422389 A JP 32422389A JP H03186498 A JPH03186498 A JP H03186498A
- Authority
- JP
- Japan
- Prior art keywords
- conductive film
- hull
- seawater
- outer plate
- contact
- 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
Links
- 239000013535 sea water Substances 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title claims abstract description 11
- 230000007797 corrosion Effects 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 14
- 230000003405 preventing effect Effects 0.000 title abstract description 8
- 230000003373 anti-fouling effect Effects 0.000 claims description 22
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 9
- 238000010828 elution Methods 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011810 insulating material Substances 0.000 abstract description 4
- 239000002990 reinforced plastic Substances 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000000605 extraction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000003973 paint Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 241001247986 Calotropis procera Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は海水に接する船体外板の防汚・防食方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing staining and corrosion of a ship's outer plate that comes into contact with seawater.
海水に接する船体外板の防汚防食手段としては、従来船
体外板の接水部分に防汚塗料を塗装するとともに、亜鉛
などの犠牲陽極を取付４ノることか知られている。Conventional antifouling and corrosion protection measures for hull shells that come into contact with seawater include painting the parts of the hull shell that come into contact with water with antifouling paint and attaching sacrificial anodes such as zinc.
しかしながら、このような手段では、下記のような欠点
がある。However, such means have the following drawbacks.
＋１１ 防汚塗料の防汚成分溶出速度を調節すること
ができないので、季節、海流、水質変化等に自在に対応
することができない。+11 Since it is not possible to adjust the elution rate of the antifouling component of the antifouling paint, it is not possible to freely respond to changes in seasons, ocean currents, water quality, etc.
（２） 防汚塗料中の毒物含有量に限度があるので、
約２年毎に塗り替え作業が必要である。(2) Since there is a limit to the amount of toxic substances contained in antifouling paints,
Repainting is required approximately every two years.
（３） 構造上大気中に曝すことができない構造物で
は、塗り替えをすることができない。(3) Structures that cannot be exposed to the atmosphere due to their structure cannot be repainted.
（４）１つの犠牲陽極の防食有効範囲が限定されるので
、広い面積を防食するためには犠牲陽極を多数付設しな
ければならない。(4) Since the effective corrosion protection range of one sacrificial anode is limited, a large number of sacrificial anodes must be attached to protect a wide area.
そこで、本出願人はさきに特１ｉ１６１−２４８８９７
号「海水に接する構造物の防汚装置」をもって、第５図
、第６図及び第７図部分横断面図に示すような装置を提
案した。Therefore, the applicant has previously decided to
No. ``Antifouling devices for structures in contact with seawater'', we proposed devices as shown in the partial cross-sectional views of Figures 5, 6, and 7.
すなわち、第５図において、０１は海水０２に接する鋼
構造の船体外板、０３は外板０１の外側を被覆する樹脂
系強化プラスチック等よりなる絶縁層、０４は絶縁１’
ｆｉ０３の外側を被覆する炭素、マグネタイト、責金属
等と有機質バイングーとからなる電気導電性膜で、それ
は後記する通電ピースＯ１１，リード線０５を介して直
流電源０６の一方の端子である（＋）極に接続されてい
る。That is, in FIG. 5, 01 is a steel-structured hull shell panel in contact with seawater 02, 03 is an insulating layer made of resin-based reinforced plastic that covers the outside of the outer panel 01, and 04 is an insulation layer 1'
It is an electrically conductive film made of carbon, magnetite, metals, etc. and organic binder that coats the outside of fi03, and it is connected to one terminal of the DC power supply 06 via the current-carrying piece O11 (to be described later) and lead wire 05 (+). connected to the pole.
０７は直流型′ｔＸＯ６の他方の端子である（−）極と
鉄、銅からなる陰極０８とを接続するリード線、０９は
導電性膜０４と陰極０８との間に流れる直流電流、０１
０は外板Ｏｌに穿設された透孔の内側端の周縁に溶着さ
れたブッシング、０１１は導電性膜０４と接する部分の
表面の接触抵抗の州別を防止するため白金の鍍金が施さ
れ電流ｔこよってファラデイ溶解が生しないように、ニ
オブ、タンタル、チタン等で作られた栓状の通電ピース
で、それの先端には外ねし０１２が刻設されている。07 is a lead wire that connects the (-) terminal, which is the other terminal of the DC type 'tXO6, and the cathode 08 made of iron and copper; 09 is a DC current flowing between the conductive film 04 and the cathode 08; 01
0 is a bushing welded to the periphery of the inner end of a through hole drilled in the outer plate 01, and 011 is a bushing plated with platinum to prevent the contact resistance of the surface in contact with the conductive film 04. In order to prevent Faraday melting due to the electric current t, it is a plug-shaped current-carrying piece made of niobium, tantalum, titanium, etc., and has an outer thread 012 carved into its tip.
０１３は外板０１と通電ピース０１１との絶縁と水密と
を図るポリエチレン、ゴムシート。013 is a polyethylene or rubber sheet that provides insulation and watertightness between the outer panel 01 and the current-carrying piece 011.
四弗化エチレン樹脂シート等で作られたプラスチックワ
ッシャー ０１４．０１５はそれぞれ通電ピース０１１
と外板０１．ブッシングＯＩＯとの間にそれぞれ充填さ
れたシリコンゴム等で作られた絶縁性充填材、０１６は
通電ピース０１１と外板Ｏ１との間に挿入された天然ゴ
ムネオプレン、ブチルゴム等で作られたゴムブツシュ、
０１７はｉｌｌｌｌ−ス０１１と外Ｆｊ、０１とを絶縁
するポリエチレン、ゴムシート、四弗化エチレン樹脂シ
ート等より作られた絶縁ワッシャー ０１８はｉｉ！ｌ
電ピース０１１を外板０１に固定するため通電ピース０
１１の外ねじ０１２と螺合するナツト、０１９はブッシ
ングＯＩＯに螺合する内ねじが刻設され央部にリード線
取出し孔０２０が穿設された通電端保護蓋、０２１は直
流型′ａ０６に設けられた中間電圧取出点、０２２は直
流型ｔＪ、０６と外板Ｏｆとを接続するリード線である
。Plastic washers 014 and 015 made of tetrafluoroethylene resin sheets, etc. are each energized piece 011
and outer panel 01. 016 is an insulating filler made of silicone rubber etc. filled between the bushing OIO and the rubber bushing made of natural rubber neoprene, butyl rubber etc. inserted between the current carrying piece 011 and the outer plate O1,
017 is an insulating washer made of polyethylene, rubber sheet, tetrafluoroethylene resin sheet, etc. that insulates illll-su 011 and outside Fj, 01. 018 is ii! l
In order to fix the electric piece 011 to the outer plate 01, the electric current piece 0 is used.
11 is a nut that screws into the external screw 012, 019 is a current-carrying end protection cover with an internal thread that screws into the bushing OIO and a lead wire extraction hole 020 in the center, and 021 is a DC type 'a06. The provided intermediate voltage extraction point 022 is a lead wire connecting the DC type tJ, 06 and the outer plate Of.
このような装置において、第６図に示すように、ｉ電性
膜０４を陽極にして直流電流０９を海水０２中に流すと
、
２Ｃ１−＋’ｌｅ−’ＩＣ，１゜
の反応により導電性膜０４の表面は濃い塩素の膜に覆わ
れ、海洋生物がその表向へ付着することを防止する。In such a device, as shown in Fig. 6, when a direct current 09 is passed into seawater 02 with the i-conductive membrane 04 as an anode, conductivity is generated due to the reaction 2C1-+'le-'IC,1°. The surface of the membrane 04 is covered with a thick chlorine film to prevent marine organisms from adhering to the surface.
また、第７図に示すように、導電性膜０４を陽極とし、
外板Ｏｌを陰極とするように電圧がかかっているので、
直流電源０６の中間電圧取出点０２１の位置が適当であ
れば、導電性膜０４か＾流出しまた直流電流０９の−・
部が外板露出部０２３に原人し、その結果、そこが陰極
防食さｎる。Further, as shown in FIG. 7, the conductive film 04 is used as an anode,
Since the voltage is applied so that the outer plate Ol becomes the cathode,
If the position of the intermediate voltage extraction point 021 of the DC power source 06 is appropriate, the conductive film 04 will flow out and the DC current 09 -.
Parts are deposited on the exposed skin portion 023, and as a result, it is cathodic protected.
そして、この防食強度は中間電圧取出点０２ｉの位置を
（−）！へずらせれば、導電性膜０４と外板露出部０２
３との間のイ４加電圧が増えるので、大きくすることが
できる。And, this corrosion protection strength is determined by changing the position of the intermediate voltage extraction point 02i (-)! If you move it, the conductive film 04 and the outer panel exposed part 02
Since the applied voltage between A4 and A4 increases, it can be increased.
このような装置によれば、外板の防汚及び防食を行うこ
とができるのであるが、下記のような欠点もある。Although such a device can provide antifouling and anticorrosion of the outer panel, it also has the following drawbacks.
（１） 船舶では外板０１の外側に支持構造を介して
陰極０８を突設するので、船体抵抗が増加するとともに
、取付費が嵩む。(1) In a ship, the cathode 08 is protruded from the outside of the outer panel 01 via a support structure, which increases the hull resistance and the installation cost.
（２） 直流電源０６に中間電圧取出点０２１を必要
とするので、電源装置が複雑になりその製作費が嵩む。(2) Since the intermediate voltage extraction point 021 is required in the DC power supply 06, the power supply device becomes complicated and its manufacturing cost increases.
本発明は、このような事情に鑑みて提案されたもので、
防汚成分溶出速度の調節が可能で、塗り替え作業が不要
であり、更に犠牲陽極を省略することができる海水に接
する船体外板の防汚・防食方法を提供することを目的と
する。The present invention was proposed in view of these circumstances, and
To provide a method for antifouling and anticorrosion of a ship's outer plate in contact with seawater, which allows adjustment of the elution rate of antifouling components, eliminates the need for repainting, and eliminates sacrificial anodes.
また、船体抵抗及び設備費の増加が少ない海水に接する
船体外板の防汚・防食方法を提供することを目的とする
。Another object of the present invention is to provide an antifouling and anticorrosion method for hull outer panels that come in contact with seawater, which causes less increase in hull resistance and equipment costs.
そのために、本発明は船体外板の海水接水面に絶縁膜を
介して布設された導電性膜とこれに対向的に海水中に設
置された電極との間に電源を接続し上記導電性膜から上
記電極へ直流を流すことにより上記船体外板の海水接水
面を保護する海水に接する船体外板の防汚・防食方法に
おいて、上記導電性膜を陽極とし、上記船体外板に突設
されたビルジキールを陰極として海中電流を流すことを
特徴とする。For this purpose, the present invention connects a power source between a conductive film installed on the seawater contact surface of a hull shell through an insulating film and an electrode installed in the seawater opposite to the conductive film. In the antifouling/corrosion method for a hull shell panel in contact with seawater, which protects the seawater contact surface of the hull shell panel by flowing a direct current from the electrode to the electrode, the electrically conductive film is used as an anode and is protruded from the hull shell panel. It is characterized by passing an underwater current using the bilge keel as a cathode.
また、本発明は導電性膜を抵抗の比較的小さい下層導電
性膜と、抵抗が比較的大きい上層導電性膜とで構成する
ことを特徴とする。Further, the present invention is characterized in that the conductive film is composed of a lower conductive film having a relatively low resistance and an upper conductive film having a relatively high resistance.
上述の構成により、
＋１１ 外板に布設された導電性膜の陽極からビルジ
キールの陰極へ海中に直流電流が流れることにより、導
電性膜の表面は海洋生物付着防止有効成分の膜により覆
われ防汚作用が行われる。With the above configuration, +11 DC current flows into the sea from the anode of the conductive film installed on the outer panel to the cathode of the bilge keel, and the surface of the conductive film is covered with a film containing an active ingredient to prevent the adhesion of marine organisms. action takes place.
（２） 導電性膜を陽極とし、外板を陰極として海中
電流を流すと、絶縁層の局部的に破損による外板露出部
に電流が流れて外板露出部の陰極防食が行われる。(2) When an underwater current is passed using the conductive film as an anode and the outer panel as a cathode, the current flows through the exposed section of the outer panel due to local damage to the insulating layer, and cathodic protection is performed on the exposed section of the outer panel.
（３） 船体構造の一部であるビルジキールをそのま
ま陰極として利用するので、外板上に支持構造を介して
陰極を突設する必要がなくなる。(3) Since the bilge keel, which is part of the ship's hull structure, is used as a cathode, there is no need to protrude the cathode from the outer plate through the support structure.
（４） 陰極のビルジキールは外板と同一電位にある
ので、直流電源装置の中間電圧取出点が不要となる。(4) Since the cathode bilge keel is at the same potential as the outer panel, there is no need for an intermediate voltage extraction point for the DC power supply.
本発明の一実施例を図面について説明すると、第５〜７
図と同一の符番はそれぞれ同図と同一の部材を示し、ま
ず、第１同圧面図及び第２図部分横断面図において、１
は船体湾曲部の力板Ｏ１に突設されたビルジキール、２
はビルジキール１と導電性膜０４との間に充填された樹
脂系強化プラスチック等よりなる絶縁材、３は（＋）極
と通電ピース０１１とがリードｍ０５を介して接続され
（−）極と外板Ｏ１とがリード線４を介して接続された
直流電源、５は導電性膜０４と陰極であるビルジキール
】との間に流れる直流電流である。If one embodiment of the present invention is explained with reference to the drawings, Nos. 5 to 7
The same reference numerals as in the figures indicate the same members as in the figures, respectively.
2 is a bilge keel protruding from the force plate O1 of the curved part of the hull;
3 is an insulating material made of resin-based reinforced plastic filled between the bilge keel 1 and the conductive film 04, and 3 is an insulating material made of resin-based reinforced plastic filled between the bilge keel 1 and the conductive film 04; A DC power source is connected to the plate O1 via a lead wire 4, and 5 is a DC current flowing between the conductive film 04 and the bilge keel which is a cathode.
続いて、第３図部分横断面図において、６は外板Ｏ１上
の絶縁層０３．導電性膜０４が局部的に剥げて生した外
板露出部、７は導電性膜０４と外板露出部６との間に流
れる直流電流である。Subsequently, in the partial cross-sectional view of FIG. 3, reference numeral 6 indicates an insulating layer 03. The outer panel exposed portion 7 created by the conductive film 04 peeling off locally is a direct current flowing between the electrically conductive film 04 and the outer panel exposed portion 6.
このような装置において、第２図に示すように、導電性
膜０４を陽極にして直流電流５を海水０２中に流すと、
Ｃｊ！ −＋ ２０ Ｈ−−ＩＣＩ２０− ＋ Ｈｔ
Ｏ＋ｅの反応により導電性膜０４の表面は海洋生物付着
防止成分の膜に覆われ、海洋生物がその表面へ付着する
ことを防止する。In such a device, as shown in FIG. 2, when a direct current 5 is passed into the seawater 02 using the conductive film 04 as an anode, Cj! −+ 20 H−−ICI20− + Ht
Due to the O+e reaction, the surface of the conductive film 04 is covered with a film of a component that prevents marine organisms from adhering to the surface, thereby preventing marine organisms from adhering to the surface.
ここで、通電ピース０１１ （第２図参照〉は導電性膜
０４の厚さ１面積により適宜間隔で設けられ、直ｉ電流
５が均一に導電性膜０４からビルジキール１へ流れるよ
うにする。Here, the current-carrying pieces 011 (see FIG. 2) are provided at appropriate intervals depending on the thickness of the conductive film 04 so that the direct current 5 flows uniformly from the conductive film 04 to the bilge keel 1.
その際の導電性膜０４から流出する１σ流電流５の電流
密度は導電性膜０４の界面に生成する塩素濃度と密接な
関係があり、その大きさは海域の温度、流動状態、海水
ｌち染度や、電気導電性膜０４の種類によって異なるが
、一般に、導電性膜０４が炭素材のときは１． ＯＡ
／ ｒ＋？以下、白金材のときは０．ＩＡ／％以下とす
るのが経済的である。The current density of the 1σ current 5 flowing out from the conductive film 04 at this time is closely related to the chlorine concentration generated at the interface of the conductive film 04, and its magnitude varies depending on the temperature of the sea area, the flow state, and the seawater level. Generally speaking, when the conductive film 04 is made of carbon material, 1. OA
/r+? Below, when using platinum material, 0. It is economical to set it to IA/% or less.
また、第３図に示すように、外板０１と導電性膜０４と
の間で、導電性膜０４を（＋）電位に外板０１を（−）
電位にすると、外板露出部６が生しても、導電性膜０４
から流出した直流電流７が外板露出部６に流入し、そこ
が陰極防食される。Further, as shown in FIG. 3, between the outer panel 01 and the conductive film 04, the electrically conductive film 04 is set to a (+) potential, and the outer panel 01 is set to a (-) potential.
When the electrical potential is applied, even if the outer plate exposed portion 6 is formed, the conductive film 04
The direct current 7 flowing out from the outer panel 6 flows into the outer skin exposed portion 6, where it is cathodic protected.
次に、第４図部分横断面図は第２図の変形例を示し、８
は金属薄板や金属溶射膜で形成され絶縁ＮＯ３の表面に
付設された比較的抵抗の小さい下Ｎ導電膜、９は導電性
膜０４と同一材質で形成され下Ｎ導電Ｆ！８の表面に付
設された比較的抵抗の大きい上層導電膜で、これと下層
導電膜８とが協働して導電性膜ｌＯを構成する。Next, FIG. 4 is a partial cross-sectional view showing a modification of FIG.
9 is a lower N conductive film formed of a thin metal plate or a metal sprayed film and has a relatively low resistance attached to the surface of the insulating NO3, and 9 is a lower N conductive film formed of the same material as the conductive film 04 and attached to the surface of the insulating NO3. The upper conductive film 8 has a relatively high resistance and is attached to the surface of the conductive film 8. This and the lower conductive film 8 cooperate to form the conductive film IO.
このような構造においても、本実施例と実質的に同一の
作用効果が得られるほか、電気抵抗を小さくすることが
できるので、広い範囲に電流を供給することができる。Even in such a structure, substantially the same effects as those of this embodiment can be obtained, and the electric resistance can be reduced, so that current can be supplied to a wide range.
これ等、実施例、変形例の方法によれば、下記作用及び
効果が奏せられる。According to the methods of these embodiments and modified examples, the following actions and effects can be achieved.
（１） 直流電源を操作することにより、季節、海流
、水質に応して防汚成分溶出速度を調節することができ
るので、防汚性能及び経済性が向上する。(1) By operating the DC power supply, the elution rate of the antifouling component can be adjusted according to the season, ocean current, and water quality, improving antifouling performance and economic efficiency.
（２） 電流を供給さへずれば、防汚成分の寿命は永
久的となるので、防汚塗料塗替えの手間が不要となり、
従って経済性が向−ヒする。(2) If the current is supplied, the antifouling component will have a permanent lifespan, eliminating the need to reapply the antifouling paint.
Therefore, economy is improved.
（３） 導電性膜及び絶縁層が局部的に破損し角板露
出部が生しても、導電性膜から流出した直流電流の一部
が上記力板露出部に流入し陰極防食を行うので、亜鉛等
の犠牲陽極が不要となり、従って経済性が向上する。(3) Even if the conductive film and insulating layer are locally damaged and an exposed square plate is formed, a portion of the direct current flowing out of the conductive film will flow into the exposed force plate and provide cathodic protection. A sacrificial anode such as zinc or the like is not required, thus improving economic efficiency.
＋４１ Ａｉ）体構造の一部であるビルジキールをそ
のまま陰極として利用するので、外板上に支持構造を介
して陰極を突設する必要がなくなり、従って船体抵抗、
取付費がそれぞれ減少する。+41 Ai) Since the bilge keel, which is a part of the hull structure, is used as a cathode, there is no need to protrude the cathode from the outer shell through the support structure, which reduces hull resistance,
Installation costs will decrease respectively.
（５）陰極のビルジキールは外板と同一電位にあるので
、直／Ｊｔ電源装置に中間電圧取出点が不要となり、従
って装置の原価が低減する。(5) Since the cathode bilge keel is at the same potential as the outer panel, there is no need for an intermediate voltage take-off point in the direct/Jt power supply, thus reducing the cost of the device.
要するに本発明によれば、船体外板の海水接水面に絶縁
膜を介して布設された導電性膜とこれに対向的に海水中
に設置された電極との間に電源を接続し上記導電性膜か
ら上記電極へ直流を流すことにより上記船体外板の海水
接水面を保護する海水に接する船体外板の防汚・防食方
法において、上記導電性膜を陽極とし、上記船体り（板
に突設されたビルジキールを陰極として海中電流を流す
ことにより、防汚成分溶出速度の調節が可能で、塗り替
え作業が不要であり、更に犠牲陽極を省略することがで
きる海水に接する船体外板の防汚・防食方法を得、ｉｌ
Ｋ電性膜を抵抗の比較的小さい下ＮＲ導電性膜、抵抗が
比較的大きい上層導電性膜とで構成することにより、船
体抵抗及び設備費の増加が少ない海水に接する船体外板
の防汚・防食方法を得るから、本発明は産業上極めて有
益なものである。In short, according to the present invention, a power source is connected between a conductive film laid on the seawater contact surface of a hull shell via an insulating film and an electrode placed in the seawater opposite to the conductive film. In an antifouling/corrosion method for a hull skin in contact with seawater, which protects the surface of the hull skin in contact with seawater by flowing a direct current from the membrane to the electrode, the conductive film is used as an anode, By applying an underwater current to the installed bilge keel as a cathode, it is possible to adjust the rate of elution of antifouling components, eliminating the need for repainting and eliminating the need for a sacrificial anode.An antifouling method for hull shell panels that come into contact with seawater.・Obtained anti-corrosion method,
By configuring the K conductive film with a lower NR conductive film with relatively low resistance and an upper conductive film with relatively high resistance, it is possible to prevent fouling of hull outer panels in contact with seawater with less increase in hull resistance and equipment costs. - The present invention is extremely useful industrially because it provides a corrosion prevention method.
第１図は本発明の−・実施例を示す正面図、第２図は第
１図の部分横断面図、第３図は第２図装置の作用を示す
同しく部分横断面図、第４図は第２図の変形例を示す同
しく部分横断面図である。
第５図は本出願人がさきに提案した海水に接する構造物
の防汚装置を示す部分横断面図、第６図、第７図はそれ
ぞれ第５図装置の防ｌチ、防食作用を示す同じく部分横
断面図である。
１・・・ビルジキール、２・・・絶縁材、３・・・直流
電源、４・・・リード線、５・・・直流電源、６・・・
外板露出部、７・・・直流電流、８・・・下層導電膜、
９・・・上層導電膜、１０・・・導電膜、
０１・・・外板、０２・・・海水、０３・・・絶縁層、
０４・・・導電性膜、０５・・・リード線、０１０・・
・ブッシング、０１１・・・１ｆｆｉ電ピース、０１２
・・・外ねし、０１３・・・プラスチックワッシャー
０１４゜０１５・・・絶縁性充填材、０１６・・・ゴム
ブツシュ、７・・・絶縁ワソノヤー
８・・・ナツト、
９・・・通電端保護蓋、
Ｏ・・・リ
ド線取出し
孔、1 is a front view showing an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of FIG. 1, FIG. 3 is a partial cross-sectional view of FIG. This figure is a partial cross-sectional view showing a modification of FIG. 2. Figure 5 is a partial cross-sectional view showing the antifouling device for structures in contact with seawater that the applicant previously proposed, and Figures 6 and 7 show the anti-fouling and anti-corrosion effects of the device in Figure 5, respectively. Similarly, it is a partial cross-sectional view. DESCRIPTION OF SYMBOLS 1... Bilge keel, 2... Insulating material, 3... DC power supply, 4... Lead wire, 5... DC power supply, 6...
Outer plate exposed portion, 7... Direct current, 8... Lower layer conductive film,
9... Upper conductive film, 10... Conductive film, 01... Outer plate, 02... Seawater, 03... Insulating layer,
04... Conductive film, 05... Lead wire, 010...
・Bushing, 011...1ffi electric piece, 012
...Outer thread, 013...Plastic washer
014゜015... Insulating filler, 016... Rubber bush, 7... Insulating wire 8... Nut, 9... Current-carrying end protection lid, O... Lead wire extraction hole,
Claims (2)
た導電性膜とこれに対向的に海水中に設置された電極と
の間に電源を接続し上記導電性膜から上記電極へ直流を
流すことにより上記船体外板の海水接水面を保護する海
水に接する船体外板の防汚・防食方法において、上記導
電性膜を陽極とし、上記船体外板に突設されたビルジキ
ールを陰極として海中電流を流すことを特徴とする海水
に接する船体外板の防汚・防食方法。(1) A power supply is connected between a conductive film laid on the seawater contact surface of the hull shell via an insulating film and an electrode placed in the seawater opposite to this, and the conductive film is connected to the electrode. In the antifouling/corrosion method for the hull skin that comes into contact with seawater, which protects the seawater contact surface of the hull skin by passing a direct current through the hull, the conductive film is used as an anode, and the bilge keel protruding from the hull skin is used as an anode. An antifouling and anticorrosion method for hull outer panels that come into contact with seawater, which is characterized by passing an underwater current as a cathode.
抵抗が比較的大きい上層導電性膜とで構成することを特
徴とする請求項（１）記載の海水に接する船体外板の防
汚・防食方法。(2) the conductive film is a lower conductive film with relatively low resistance;
2. The antifouling and anticorrosion method for a hull outer panel that comes into contact with seawater according to claim 1, wherein the method comprises an upper conductive film having a relatively high resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1324223A JP2809351B2 (en) | 1989-12-14 | 1989-12-14 | Antifouling and anticorrosion methods for hull skin in contact with seawater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1324223A JP2809351B2 (en) | 1989-12-14 | 1989-12-14 | Antifouling and anticorrosion methods for hull skin in contact with seawater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03186498A true JPH03186498A (en) | 1991-08-14 |
| JP2809351B2 JP2809351B2 (en) | 1998-10-08 |
Family
ID=18163416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1324223A Expired - Lifetime JP2809351B2 (en) | 1989-12-14 | 1989-12-14 | Antifouling and anticorrosion methods for hull skin in contact with seawater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809351B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103789A (en) * | 1986-10-20 | 1988-05-09 | Mitsubishi Heavy Ind Ltd | Pollution preventing device for structure being in contact with sea water |
-
1989
- 1989-12-14 JP JP1324223A patent/JP2809351B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103789A (en) * | 1986-10-20 | 1988-05-09 | Mitsubishi Heavy Ind Ltd | Pollution preventing device for structure being in contact with sea water |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2809351B2 (en) | 1998-10-08 |
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