JPH04313378A - Antifouling device - Google Patents
Antifouling deviceInfo
- Publication number
- JPH04313378A JPH04313378A JP7777791A JP7777791A JPH04313378A JP H04313378 A JPH04313378 A JP H04313378A JP 7777791 A JP7777791 A JP 7777791A JP 7777791 A JP7777791 A JP 7777791A JP H04313378 A JPH04313378 A JP H04313378A
- Authority
- JP
- Japan
- Prior art keywords
- anode
- coating layer
- reference electrode
- seawater
- cathode
- 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
- 230000003373 anti-fouling effect Effects 0.000 title claims description 18
- 239000013535 sea water Substances 0.000 claims abstract description 17
- 239000007772 electrode material Substances 0.000 claims abstract description 16
- 239000011247 coating layer Substances 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052801 chlorine Inorganic materials 0.000 abstract description 8
- 239000000460 chlorine Substances 0.000 abstract description 8
- 238000005868 electrolysis reaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000013459 approach Methods 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 241000238586 Cirripedia Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、海洋構造物、船舶、海
水輸送用の配管または水路、魚網やいけす網あるいは海
水取水口のスクリーンに、海洋生物やスケールが付着し
て汚染することを防止する防汚装置の改良に関する。[Industrial Application Field] The present invention prevents marine organisms and scale from adhering to and contaminating marine structures, ships, piping or waterways for seawater transportation, fishing nets, fish nets, or seawater intake screens. This invention relates to improvements in antifouling devices.
【0002】0002
【従来の技術】たとえば発電所の冷却水用の海水を輸送
する配管や海水取水口のスクリーン、船の舷側、桟橋、
浮き台、橋脚などの海洋構造物において常に海水に接し
ている部分には、種々の海草やフジツボそのほかの貝の
ような海洋生物が付着し、それによって取水量の減少や
船舶の航行速度低下などの問題が生じる。このため、付
着した海洋生物を定期的に取り除かなければならないが
、これは困難な作業である。[Prior Art] For example, piping that transports seawater for cooling water in power plants, screens at seawater intake ports, the sides of ships, piers,
Portions of floating structures, bridge piers, and other marine structures that are constantly in contact with seawater are covered with various seaweeds, barnacles, and other marine organisms such as shellfish, which can cause problems such as a decrease in water intake and a slowdown in ship navigation speed. The problem arises. For this reason, attached marine organisms must be removed periodically, which is a difficult task.
【0003】海洋生物の付着のメカニズムは、まず赤潮
菌などの微生物が付着して生物皮膜が形成され、それに
フジツボなどの大型生物の幼生が付着し成長するという
順序に従う。 従って、微生物の付着を防止すること
、および大型生物の幼生が付着し成長するのを防止する
ことが上記の問題の効果的な解決策であり、そのための
技術が種々提案されている。[0003] The mechanism of adhesion of marine organisms follows the order in which microorganisms such as red tide fungi attach to the surface and a biological film is formed, and then larvae of large organisms such as barnacles attach and grow. Therefore, an effective solution to the above problems is to prevent the attachment of microorganisms and the attachment and growth of larvae of large organisms, and various techniques have been proposed for this purpose.
【0004】その多くは、塩素系イオンまたは銅イオン
を被防汚体の周囲に発生させて、付着しようとする生物
を死滅させることを目的としたものである。 これら
の技術は、実施の態様によっては重大な海洋汚染につな
がり好ましくない。[0004] Most of these methods are aimed at generating chlorine-based ions or copper ions around the object to be decontaminated to kill living organisms that attempt to adhere to the object. Depending on the mode of implementation, these techniques may lead to serious marine pollution and are therefore undesirable.
【0005】このような状況にかんがみ、出願人は、被
防汚体に導電性材料で被覆層を設け、この被覆層と接触
しないように海水中に、チタンなどの電極材と照合電極
を配置し、被覆層を陽極、電極材を陰極として直流電圧
を印加し、照合電極と陽極との電位差をある一定値に制
御しながら微弱な電流を流し、被覆層に触れた微生物に
電気的なショックを与えてその付着を防止する装置を提
案した(特願平2−194257号)。In view of this situation, the applicant provided a coating layer of a conductive material on the antifouling object, and arranged an electrode material such as titanium and a reference electrode in seawater so as not to come into contact with the coating layer. Then, a DC voltage is applied using the coating layer as an anode and the electrode material as a cathode, and a weak current is passed while controlling the potential difference between the reference electrode and the anode to a certain value, giving an electric shock to microorganisms that come into contact with the coating layer. proposed a device that prevents its adhesion by giving it (Japanese Patent Application No. 2-194257).
【0006】この技術の実施に当って、陽極電位を制御
しているにもかかわらず、陽極で塩素が発生する場合が
あることを経験した。 その原因を追及したところ、
測定される陽極電位は、陰極から陽極への距離によって
異なり、陰極に最も近い部分が高く、陰極から遠くなる
に従って低くなることがわかった。 このため、図2
に示したように陰極からはなれた部分の陽極電位を照合
電極で測定し、それにもとづいて電位をコントロールす
ると、陰極に近い部分の電位が予想以上に高くなって、
塩素の発生を完全に防止できないことになる。[0006] In implementing this technique, we have experienced that chlorine may be generated at the anode despite controlling the anode potential. When we investigated the cause, we found that
It was found that the measured anode potential varied depending on the distance from the cathode to the anode, with the potential being higher closest to the cathode and lower as the distance from the cathode increased. For this reason, Figure 2
As shown in , when the anode potential of the part far from the cathode is measured with a reference electrode and the potential is controlled based on that, the potential of the part close to the cathode becomes higher than expected.
This means that the generation of chlorine cannot be completely prevented.
【0007】[0007]
【発明が解決しようとする課題】本発明の目的は、上記
の問題を解決して、塩素の発生を完全に防止した防汚装
置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide an antifouling device that completely prevents the generation of chlorine.
【0008】[0008]
【課題を解決するための手段】本発明の防汚装置は、一
例を図1に示すように、海水に接触する構造物、船舶、
配管(1)または網などの防汚を必要とする部分を被覆
した導電性の被覆層(3)、この被覆層と接触しないよ
うに海水中に配置した電極材(4)、照合電極(5)お
よび直流電源(6)から本質的に構成される防汚装置に
おいて、直流電源は照合電極と陽極との電位差を一定の
範囲に制御する機能を有し、被覆層を陽極、電極材を陰
極とするよう直流電源に接続し、照合電極を、陽極が陰
極に最も近接している部分の近くに配置したことを特徴
とする。[Means for Solving the Problems] The antifouling device of the present invention, as shown in FIG.
A conductive coating layer (3) that covers parts that require antifouling such as piping (1) or netting, an electrode material (4) placed in seawater so as not to come into contact with this coating layer, and a reference electrode (5). ) and a DC power source (6), the DC power source has the function of controlling the potential difference between the reference electrode and the anode within a certain range, and the coating layer is used as the anode and the electrode material is used as the cathode. It is characterized in that it is connected to a DC power source so that the reference electrode is placed near the part where the anode is closest to the cathode.
【0009】図面において、(8)は絶縁材を、(9)
は海水を示す。In the drawings, (8) represents an insulating material, and (9) represents an insulating material.
indicates seawater.
【0010】本発明の防汚装置は、被防汚体の種類およ
び周囲の環境条件に応じて適切に構成すればよい。
被覆層は被防汚体に直接設けてもよいし、被防汚体が絶
縁を必要とするならば両者の間に絶縁層を設けてもよい
。
また、コンクリート水路、橋脚、船など、被防汚体
に直接被覆層を設けることが困難なものに対しては、適
当な給電体上に被覆層を形成し、それらを被防汚体の表
面に配置してもよい。The antifouling device of the present invention may be appropriately configured depending on the type of object to be antifouled and the surrounding environmental conditions.
The coating layer may be provided directly on the object to be antifouled, or if the object to be antifouled requires insulation, an insulating layer may be provided between the two. In addition, for concrete waterways, bridge piers, ships, and other objects where it is difficult to apply a coating layer directly to the object to be antifouled, we can form a coating layer on an appropriate power supply and apply it to the surface of the object to be antifouled. It may be placed in
【0011】被覆層についていえば、海水の流れが速い
ところなど摩耗の心配があるときは、導電性ゴムシート
をライニングしたものが好ましいし、海水の流れがほと
んどないところであれば、導電性塗料の塗膜で足りるで
あろう。 網のような被防汚体には、熱可塑性樹脂の
粉末と導電性物質の粉末とからなる組成物を使用した粉
末ライニング法で被覆層を形成するとよい。Regarding the coating layer, if there is a concern about abrasion, such as in areas where there is a fast flow of seawater, it is preferable to use one lined with a conductive rubber sheet, and if there is little seawater flow, it is preferable to use a conductive rubber sheet lining. A paint film will suffice. A coating layer may be formed on an antifouling object such as a net by a powder lining method using a composition consisting of thermoplastic resin powder and conductive substance powder.
【0012】電極材には、チタン基材に貴金属をメッキ
したものや、貴金属の酸化物をコーティングしたもの、
あるいは銀鉛合金や炭素系材料の棒状体が適している。
電極材と被覆層とが直接接触しないように両者を配
置する必要があり、これには電極材を絶縁材のチューブ
などで部分的に被覆しておくとよい。[0012] Electrode materials include titanium base materials plated with noble metals, noble metal oxide coatings,
Alternatively, a rod-shaped body made of silver-lead alloy or carbon-based material is suitable. It is necessary to arrange the electrode material and the covering layer so that they do not come into direct contact with each other, and for this purpose it is preferable to partially cover the electrode material with an insulating material tube or the like.
【0013】直流電源には、市販の整流器を使用すれば
よい。A commercially available rectifier may be used as the DC power source.
【0014】[0014]
【作用】図2に示したように、陽極電位には分布があり
、鋼管の中央に照合電極を配置して陽極との電位差を1
.2Vにコントロールすると、電極材に近い部分では電
位差が1.2Vより高くなる。 図2に示した例では
、最高の電位差が約1.5Vになり、海水の電解によっ
て塩素が発生する可能性が出てくる。[Operation] As shown in Figure 2, the anode potential has a distribution, and a reference electrode is placed in the center of the steel pipe to reduce the potential difference with the anode by 1.
.. When controlled to 2V, the potential difference becomes higher than 1.2V in a portion close to the electrode material. In the example shown in FIG. 2, the maximum potential difference is about 1.5V, and there is a possibility that chlorine will be generated by electrolysis of seawater.
【0015】照合電極を電極材に近いところに配置すれ
ば、陽極電位の最も高い部分の電位をコントロールでき
るので、塩素の発生を完全に防止できる。If the reference electrode is placed close to the electrode material, the potential of the highest anode potential can be controlled, thereby completely preventing the generation of chlorine.
【0016】[0016]
【実施例】両端にフランジを有する鋼管(口径「100
A」、長さ1m)を、10本用意した。 それぞれの
内面に、クロロプレンゴム100重量部にカーボンブラ
ック30重量部、グラファイト40重量部および加硫剤
等を常法に従い配合し、混練して押し出した導電性ゴム
シートをライニングして、導電性の被覆層(3)を設け
た。 加硫後のシートの厚さは5mm。 鋼管のフ
ランジ面や外周面など、導電性シートのライニングのな
いすべての部分を、絶縁材で被覆した。[Example] Steel pipe with flanges at both ends (caliber “100”)
A", length 1m), 10 pieces were prepared. The inner surface of each is lined with a conductive rubber sheet prepared by mixing 100 parts by weight of chloroprene rubber, 30 parts by weight of carbon black, 40 parts by weight of graphite, a vulcanizing agent, etc., and kneading and extruding the mixture in a conventional manner. A covering layer (3) was provided. The thickness of the sheet after vulcanization is 5 mm. All parts of the steel pipe that are not lined with conductive sheets, such as the flange surface and outer circumferential surface, are covered with an insulating material.
【0017】被覆鋼管それぞれのフランジ近くに孔をあ
け、そこに絶縁材で側面および後端を被覆し後端の絶縁
材に小孔をあけた円柱状の銀からなる照合電極を、先端
が管内部にわずか突き出るように挿入し、固定した。A hole is made near the flange of each coated steel pipe, and a reference electrode made of cylindrical silver whose side surface and rear end are covered with an insulating material and a small hole is made in the insulating material at the rear end is placed in the hole near the flange of the coated steel pipe. It was inserted so that it protruded slightly inside and fixed.
【0018】フランジ部分と同じ形状寸法の面をもつチ
タン製のドーナツ状板に白金をメッキして、電極材とし
た。[0018] A donut-shaped plate made of titanium having a surface having the same shape and dimensions as the flange portion was plated with platinum to form an electrode material.
【0019】上記の鋼管を、図1に示すように、電極材
(4)をはさんでフランジ接合して試験用の配管とした
。 直流電源(6)の陽極端子、陰極端子、および照
合電極端子は、各鋼管に設けた接続端子、電極材、照合
電極(5)と接続ケーブルで配線した。As shown in FIG. 1, the above-mentioned steel pipe was flange-jointed with an electrode material (4) in between to form a test pipe. The anode terminal, cathode terminal, and reference electrode terminal of the DC power supply (6) were wired to the connection terminal, electrode material, and reference electrode (5) provided on each steel pipe using connection cables.
【0020】この配管に、海水を0.5m/secの流
速で流した。 鋼管1本あたり10〜30mAの直流
電流を通電し、導電性の被覆層と照合電極との電位差を
SCE換算値で約1.2Vに制御しつつ、配管の防汚を
行なった。[0020] Seawater was flowed through this pipe at a flow rate of 0.5 m/sec. A direct current of 10 to 30 mA was applied to each steel pipe, and the piping was antifouled while controlling the potential difference between the conductive coating layer and the reference electrode to about 1.2 V in terms of SCE.
【0021】上記の防汚装置の配管内部を照合電極が自
由に移動できるように挿入し、配管の一端から他端まで
照合電極を移動させて陽極電位を測定した。 その結
果をSCE換算値で表示し、図1にあわせて示した。[0021] A reference electrode was inserted into the pipe of the above-mentioned antifouling device so that it could move freely, and the anode potential was measured by moving the reference electrode from one end of the pipe to the other. The results were expressed as SCE converted values and shown in FIG. 1.
【0022】[0022]
【発明の効果】本発明の防汚装置は、陽極電位の最大値
をコントロールできるので、海水の電解により塩素が発
生する心配がまったくない。[Effects of the Invention] Since the antifouling device of the present invention can control the maximum value of the anode potential, there is no concern that chlorine will be generated due to electrolysis of seawater.
【図1】 本発明の防汚装置の一例を説明するための
断面図と、陽極電位の分布を示したグラフ。FIG. 1 is a cross-sectional view for explaining an example of the antifouling device of the present invention and a graph showing the distribution of anode potential.
【図2】 従来の防汚装置を説明するための断面図と
、陽極電位の分布を示したグラフ。FIG. 2 is a cross-sectional view for explaining a conventional antifouling device and a graph showing the distribution of anode potential.
1 被防汚体 3 導電性の被覆層 4 電極材 5 照合電極 6 直流電源 8 絶縁材 9 海水 1. Antifouling object 3 Conductive coating layer 4 Electrode material 5 Reference electrode 6 DC power supply 8 Insulating material 9 Seawater
Claims (3)
たは網などの防汚を必要とする部分を被覆した導電性の
被覆層、この被覆層と接触しないように海水中に配置し
た電極材、照合電極および直流電源から本質的に構成さ
れる防汚装置において、直流電源は照合電極と陽極との
電位差を一定の範囲に制御する機能を有し、被覆層を陽
極、電極材を陰極とするよう直流電源に接続し、照合電
極を陽極が陰極に最も近接している部分の近くに配置し
たことを特徴とする防汚装置。Claim 1: A conductive coating layer that covers parts of structures, ships, piping, or networks that come into contact with seawater that require antifouling, and an electrode material placed in seawater so as not to come into contact with the coating layer. In an antifouling device that essentially consists of a reference electrode and a DC power supply, the DC power supply has the function of controlling the potential difference between the reference electrode and the anode within a certain range, and the coating layer is used as the anode and the electrode material is used as the cathode. An antifouling device characterized in that it is connected to a DC power source so as to provide a reference electrode near the part where the anode is closest to the cathode.
樹脂のライニング層、または導電性塗料の塗膜である請
求項1の防汚装置。2. The antifouling device according to claim 1, wherein the coating layer is a lining layer of conductive rubber or conductive resin, or a coating film of conductive paint.
1または2の防汚装置。3. The antifouling device according to claim 1, wherein the coating layer includes a power supply body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3077777A JPH0738981B2 (en) | 1991-04-10 | 1991-04-10 | Antifouling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3077777A JPH0738981B2 (en) | 1991-04-10 | 1991-04-10 | Antifouling device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04313378A true JPH04313378A (en) | 1992-11-05 |
JPH0738981B2 JPH0738981B2 (en) | 1995-05-01 |
Family
ID=13643393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3077777A Expired - Fee Related JPH0738981B2 (en) | 1991-04-10 | 1991-04-10 | Antifouling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0738981B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006110468A (en) * | 2004-10-14 | 2006-04-27 | Tsurumi Mfg Co Ltd | Method and apparatus for preventing scale from adhering |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61143395A (en) * | 1984-10-26 | 1986-07-01 | ワ−ナ−−ランバ−ト・コンパニ− | N6-bicycloadenosines |
JPS63142109A (en) * | 1986-12-04 | 1988-06-14 | Mitsubishi Heavy Ind Ltd | Antifouling apparatus for structure in contact with sea water |
-
1991
- 1991-04-10 JP JP3077777A patent/JPH0738981B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61143395A (en) * | 1984-10-26 | 1986-07-01 | ワ−ナ−−ランバ−ト・コンパニ− | N6-bicycloadenosines |
JPS63142109A (en) * | 1986-12-04 | 1988-06-14 | Mitsubishi Heavy Ind Ltd | Antifouling apparatus for structure in contact with sea water |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006110468A (en) * | 2004-10-14 | 2006-04-27 | Tsurumi Mfg Co Ltd | Method and apparatus for preventing scale from adhering |
Also Published As
Publication number | Publication date |
---|---|
JPH0738981B2 (en) | 1995-05-01 |
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