JPH07119447B2 - Antifouling device for intake groove - Google Patents
Antifouling device for intake grooveInfo
- Publication number
- JPH07119447B2 JPH07119447B2 JP1306529A JP30652989A JPH07119447B2 JP H07119447 B2 JPH07119447 B2 JP H07119447B2 JP 1306529 A JP1306529 A JP 1306529A JP 30652989 A JP30652989 A JP 30652989A JP H07119447 B2 JPH07119447 B2 JP H07119447B2
- Authority
- JP
- Japan
- Prior art keywords
- intake groove
- conductive coating
- seawater
- intake
- groove
- 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
Links
- 230000003373 anti-fouling effect Effects 0.000 title claims description 7
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000013535 sea water Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- 239000000460 chlorine Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 235000019577 caloric intake Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、発電プラント等の冷却用海水の取水溝に付設
する、海洋生物による汚染を防止する装置に関する。Description: TECHNICAL FIELD The present invention relates to a device for preventing pollution by marine organisms, which is attached to a water intake groove for cooling seawater of a power plant or the like.
（従来の技術） 従来の海水取水溝は、第３図にみるように、コンクリー
ト製若しくは鋼管製の取水溝１が土２の中に埋設され、
該取水溝を経て取水される海水は、例えば発電用プラン
トのタービンの冷却水として使用される。(Prior Art) In a conventional seawater intake groove, as shown in FIG. 3, an intake groove 1 made of concrete or steel pipe is buried in soil 2,
Seawater taken through the water intake groove is used as cooling water for a turbine of a power generation plant, for example.
取水溝の壁面には、海洋生物が付着するため、取水溝が
狭くなって冷却水量が不足したり、付着した海洋生物が
再び脱落してプラントを損傷したりする問題があった。
そのため、取水溝が鋼管の場合は、その表面に防汚塗料
を塗布して海洋生物の付着を防止したり、取水溝がコン
クリートの場合はプラントの休止時に人工的に付着生物
を除去する作業を行うか、又は、塩素を注入して海洋生
物の付着を防止することが行われていた。Since marine organisms adhere to the wall surface of the intake ditch, there are problems that the intake ditch becomes narrow and the amount of cooling water becomes insufficient, or the adhering marine organisms fall off again and damage the plant.
Therefore, if the water intake groove is a steel pipe, apply antifouling paint to the surface to prevent the adhesion of marine organisms, and if the water intake groove is concrete, work to artificially remove the adhered organisms when the plant is at rest. It was done or chlorine was injected to prevent the attachment of marine life.
しかし、発電用プラントの取水溝は縦横それぞれ数ｍ、
長さ数百ｍに及び、取水溝壁面に付着する海洋生物の厚
さは数十cmとなるため、その量は膨大なものであり、除
去作業や廃棄作業は大変困難であった。However, the water intake groove of the power plant is several meters long and wide,
Since the length of several hundred meters and the thickness of marine organisms adhering to the intake wall surface are several tens of centimeters, the amount is enormous, and removal and disposal work was very difficult.
一方、発電用プラントの冷却用海水の取水は、プラント
の性能を維持する上で不可欠であるため、取水溝を２系
列設備してプラントを休止させることなく、取水溝を交
互に清掃するなどの対策が採られているが、その費用は
相当なものである。On the other hand, since the intake of the cooling seawater of the power generation plant is indispensable for maintaining the performance of the plant, it is necessary to alternately clean the intake ditches without suspending the plant by installing two series of intake ditches. Measures have been taken, but the cost is considerable.
また、取水溝に海洋生物の付着を防止するための塩素を
注入する方法は、排水時に周囲のための塩素を注入する
方法は、排水時に周囲の海水中の塩素イオン濃度を高く
し、生態系を壊したり、養殖で生計を営む住民に影響を
与える心配があるため、好ましい方法ではない。In addition, the method of injecting chlorine to prevent the adhesion of marine organisms to the intake ditch is to inject chlorine for the surroundings during drainage by increasing the chlorine ion concentration in the surrounding seawater during drainage, It is not a preferable method because it may damage the livestock or affect the livelihoods of people living in aquaculture.
そこで、本発明者は、先に、取水溝の底面を含めた内壁
に導電性塗料を塗布したパネルを取り付けて陽極とな
し、取水溝内の陰極との間に通電し、生態系に影響を与
えずに、取水溝の内壁に海洋生物の付着を防止する装置
を提案した（特願昭63−296355号）。Therefore, the present inventor first installed a panel coated with a conductive coating on the inner wall including the bottom surface of the intake groove to form an anode, and energize between the cathode in the intake groove to affect the ecosystem. We proposed a device to prevent marine organisms from adhering to the inner wall of the intake ditch (Japanese Patent Application No. 63-296355).
（発明が解決しようとする課題） しかし、その後の研究によると、海洋生物の付着は、も
っぱら取水溝の側壁若しくは上壁に限定され、底面には
泥が堆積するが、海洋生物は付着量が少ないことを見い
だした。(Problems to be solved by the invention) However, according to the subsequent research, the adhesion of marine organisms is limited to only the side wall or the upper wall of the intake ditch, and the mud is deposited on the bottom surface, but the amount of marine organisms adhered is small. I found a few.
本発明は、かかる知見に基づいて、海洋生物が付着する
壁面にのみ導電性塗膜の陽極を配置することにより、防
汚装置の構造を簡素化し、通電エネルギーの節約を可能
とした取水溝の防汚装置を提供しようとするものであ
る。The present invention, based on such knowledge, by arranging the anode of the conductive coating film only on the wall surface to which marine life adheres, simplifies the structure of the antifouling device and reduces the energization energy intake groove. It is intended to provide an antifouling device.
（課題を解決するための手段） 本発明は、取水溝側壁、必要に応じて、上壁に直接若し
くはパネルを介して間接に導電性塗膜を形成して陽極と
なし、底部に金属等の導電性材料からなる陰極を配置
し、両極間に連続的若しくは断続的に通電する手段を付
設したことを特徴とする海水取水溝の防汚装置である。(Means for Solving the Problems) The present invention is directed to a side wall of a water intake groove, and if necessary, a conductive coating film is formed directly on the upper wall or indirectly via a panel to form an anode, and a metal such as metal is formed on the bottom. The antifouling device for a seawater intake groove is characterized in that a cathode made of a conductive material is arranged, and means for electrically or continuously energizing the both electrodes is attached.
（作用） 本発明は、海洋生物が付着する取水溝の側壁、必要に応
じて上壁に導電性塗膜を形成して陽極となし、例えば底
面の金属板等の陰極との間に連続的若しくは断続的に通
電することにより、海水を電気分解し、 2Cl-→Cl2＋2e- との電極反応で生成する塩素ガスにより、陽極である取
水溝側壁や上壁に、海洋生物が付着することを防止する
ものである。通電条件を電流密度0.01A/m2以上、海水中
の陽分極電位を1000mV付近以上とするときには、陽極の
導電性塗膜表面のCl2濃度は0.1ppm前後となるが、生態
系に影響を与えるものではない。(Operation) The present invention forms an anode by forming a conductive coating film on the side wall of a water intake groove to which marine organisms adhere, and if necessary, on the upper wall to form an anode, for example, a continuous coating between a cathode such as a bottom metal plate. or by intermittently energized, seawater electrolysis of, 2Cl - → Cl 2 + 2e - the chlorine gas generated in the electrode reaction with the intake groove sidewall and the top wall is an anode, the marine organisms adhere Is to prevent. When the current density is 0.01 A / m 2 or more and the anodic polarization potential in seawater is around 1000 mV or more, the Cl 2 concentration on the surface of the conductive coating film on the anode is around 0.1 ppm, but this affects the ecosystem. Not something to give.
本発明は、取水溝がコンクリート製であるときに特に有
効であるが、既設の取水溝で海水に浸っている場合は、
導電性塗料を直接塗装することが困難であるので、導電
性塗料を塗装したパネルを取水溝の側壁や上壁に取り付
ける。The present invention is particularly effective when the intake groove is made of concrete, but when immersed in seawater in the existing intake groove,
Since it is difficult to directly apply the conductive paint, the panel coated with the conductive paint is attached to the side wall or the upper wall of the water groove.
（実施例） 以下、本発明の１実施例を第１図によって説明する。(Example) Hereinafter, one example of the present invention will be described with reference to FIG.
第１図において、１は例えばコンクリート製の取水溝の
壁、３はプラスチックパネル、４は陽極となる導電性塗
膜、５は陰極鋼板、６はプラスチック製ボルト、７は通
電端部を示す。In FIG. 1, 1 is a wall of a water intake groove made of concrete, 3 is a plastic panel, 4 is a conductive coating film serving as an anode, 5 is a cathode steel plate, 6 is a plastic bolt, and 7 is a conducting end.
プラスチックパネルは、硬質塩化ビニル、アクリル樹
脂、エポキシ樹脂又は不飽和ポリエステル樹脂使用のFR
P板等が使用されるが、耐海水性であれば他の有機材料
はもとより無機材料でもよく、その種類を問わず使用で
きる。プラスチックパネルの形状は、円弧状若しくは平
板状など取水溝の内壁の形状に沿ったものが使用され
る。Plastic panels are made of hard vinyl chloride, acrylic resin, epoxy resin or unsaturated polyester resin FR
A P plate or the like is used, but as long as it is resistant to seawater, it may be an inorganic material as well as other organic materials, and it can be used regardless of its type. As the shape of the plastic panel, a shape that follows the shape of the inner wall of the water intake groove such as an arc shape or a flat plate shape is used.
プラスチックパネルへの導電性塗料の塗装に際して、パ
ネルとの密着性を考慮してバインダーコート、例えばビ
ニル系バインダーを塗装しておくことが望ましいが、密
着性に支障がなければ省略してもよい。At the time of applying the conductive paint to the plastic panel, it is desirable to apply a binder coat, for example, a vinyl binder, in consideration of the adhesion to the panel, but it may be omitted if the adhesion is not hindered.
導電性塗料としては、アクリル樹脂系、ウレタン樹脂
系、ビニル樹脂系等のバインダーに、導電材料として例
えば粒径数μｍ〜数十μｍのグラファイト粉末（その
他、カーボンブラック、Tiなど耐電解性で導電性のある
ものならば何れでもよい）を体積比で30〜65％混入した
ものを使用し、形成される導電性塗膜の体積固有抵抗が
102〜10-2Ωcmとするのが好ましい。このような導電性
塗膜を使用することにより、海水を容易に電気分解し、
塩素の発生を効果的に行うことができる。なお、導電性
塗料の組成は塗装作業性、耐海水性、耐電気分解性に支
障がなければ種類、成分割合は問わない。The conductive paint may be an acrylic resin-based, urethane resin-based or vinyl resin-based binder, and the conductive material may be, for example, graphite powder having a particle size of several μm to several tens of μm (other than carbon black, Ti, etc. (If it has good properties), the volume resistivity of the conductive coating film formed is 30% to 65% by volume.
It is preferably 10 2 to 10 -2 Ωcm. By using such a conductive coating, seawater is easily electrolyzed,
It is possible to effectively generate chlorine. In addition, the composition of the conductive paint may be of any type and component ratio as long as it does not affect the coating workability, seawater resistance and electrolysis resistance.
電流分布を広範囲に維持するために、上記の耐電解性に
優れた導電性塗膜を上層に、下層には高導電性塗料、例
えば銅系又はニッケル系粉末を導電材料として体積比で
30〜40％、上記のバインダーに分散させた高導電性塗料
（体積固有抵抗10-3〜10-4Ωcm）の塗膜を使用すること
が実用的である。また、高導電性塗料を下層に塗装する
代わりに、高導電性金属（例えばAl、Cuなど）又は金属
酸化物などの板（含薄板、箔）や溶射膜を設け、この下
層の体積固有抵抗を10-5〜10-6Ωcmとすることも実用的
に有利である。In order to maintain the current distribution in a wide range, the conductive coating excellent in the above-mentioned electrolysis resistance is used as the upper layer, and the lower layer is a highly conductive coating, for example, copper-based or nickel-based powder as a conductive material in a volume ratio.
It is practical to use a coating film of 30 to 40% of a highly conductive coating material (volume specific resistance 10 −3 to 10 −4 Ωcm) dispersed in the above binder. Also, instead of coating a high-conductivity paint as the lower layer, a plate (thin plate, foil) or spray coating of high-conductivity metal (eg, Al, Cu, etc.) or metal oxide is provided, and the volume resistivity of this lower layer is set. It is also practically advantageous to set 10 -5 to 10 -6 Ωcm.
導電性塗膜の乾燥膜厚は、１層膜のときには200〜400μ
ｍ、２層膜のときには下層膜が100〜400μｍ、上層膜が
200〜400μｍが実用的であるが、耐久寿命に関係するた
め、防汚性能に支障がなければ膜厚は特に限定されるも
のではない。The dry film thickness of the conductive coating is 200-400μ when it is a single layer film.
m is a two-layer film, the lower layer film is 100-400 μm, and the upper layer film is
Although 200 to 400 μm is practical, the film thickness is not particularly limited as long as it does not affect the antifouling performance because it is related to the durable life.
導電性塗料を塗布したプラスチックパネルは、取水溝の
壁に孔をあけ、例えばプラスチック製のボルト６を使用
して水中硬化型接着剤で固定される。The plastic panel coated with the conductive paint has holes formed in the wall of the water intake groove, and is fixed with an underwater curing type adhesive using, for example, a plastic bolt 6.
それぞれのプラスチックパネルには通電端部を設ける
が、これらは耐久性を長くするために、大気中に位置す
るように装着するのが好ましい。Each plastic panel is provided with a current-carrying end, but it is preferable to mount them so as to be located in the atmosphere in order to prolong durability.
一方、取水溝の底部には通電時に陰極となる鋼板（鋼棒
あるいは他の金属板でもよい）を配置する。On the other hand, at the bottom of the water intake groove, a steel plate (a steel rod or other metal plate may be used) that serves as a cathode when energized is arranged.
このように取水溝側壁の導電性塗膜を陽極に、底部の鋼
板を陰極になるように通電した。電流密度を0.02A/m2以
上、陽分極電位1000mV以上にすると、導電性塗膜表面か
ら検知用指示薬オルソトリジンの変色（黄色）が検知で
き、Cl2の発生を確認することができた。なお、通電は
連続的に行ってもよいし、断続的に行ってもよい。In this way, electricity was applied so that the conductive coating film on the side wall of the water intake groove became the anode and the steel plate at the bottom became the cathode. When the current density was 0.02 A / m 2 or more and the anodic polarization potential was 1000 mV or more, the discoloration (yellow) of the detection indicator orthotridine could be detected from the surface of the conductive coating film, and the generation of Cl 2 could be confirmed. The energization may be performed continuously or intermittently.
上記の通電条件で海水中に１年間浸漬テストを行ったと
ころ、導電性塗膜表面には海洋生物の付着は全く認めら
れなかった。When a dipping test was carried out in seawater for 1 year under the above-mentioned energization conditions, no marine organisms were observed on the surface of the conductive coating film.
（発明の効果） 本発明は、上記の構成を採用することにより、取水溝側
壁及び又は上壁だけに導電性塗膜を形成して、海洋生物
の付着を完全に防止することができ、従来、取水溝に付
着する海洋生物の除去に要した多大の労力を不用とし、
かつ、設備費及び運転費を低下させるので、その工業的
効果は顕著なものである。(Advantages of the Invention) The present invention, by adopting the above configuration, can form a conductive coating film only on the intake groove side wall and / or the upper wall to completely prevent the adhesion of marine organisms. , Eliminates the great effort required to remove marine organisms adhering to the intake ditches,
Moreover, since the facility cost and the operating cost are reduced, its industrial effect is remarkable.
第１図及び第２図は本発明の実施例を説明するための断
面図、第３図は従来の取水溝の斜視図である。1 and 2 are sectional views for explaining an embodiment of the present invention, and FIG. 3 is a perspective view of a conventional water intake groove.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 植田 健二 長崎県長崎市飽の浦町５番７号 菱興ビル 別館５階 長菱エンジニアリング株式会社 内 (72)発明者 堀口 勉 長崎県長崎市飽の浦町５番７号 菱興ビル 別館５階 長菱エンジニアリング株式会社 内 (72)発明者 山崎 弘 長崎県長崎市飽の浦町５番７号 菱興ビル 別館５階 長菱エンジニアリング株式会社 内 (56)参考文献 特開 平２−144406（ＪＰ，Ａ) 特公 昭62−33366（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Ueda Kenji Ueda 5-7, Atsunoura-machi, Nagasaki-shi, Nagasaki Ryoko Building Annex, 5th floor, Nagahishi Engineering Co., Ltd. No. 7 Ryoko Building Annex 5F, Nagahishi Engineering Co., Ltd. (72) Inventor Hiroshi Yamazaki 5-7 Watananoura-cho, Nagasaki City, Nagasaki Ryoko Building Annex 5F, Nagahishi Engineering Co., Ltd. (56) References Special Kaihei 2-144406 (JP, A) Japanese Patent Sho 62-33366 (JP, B2)
Claims (1)
しくはパネルを介して間接に導電性塗膜を形成して陽極
となし、底部に金属等の導電性材料からなる陰極を配置
し、両極間に連続的若しくは断続的に通電する手段を付
設したことを特徴とする海水取水溝の防汚装置。1. A side wall of a water intake groove, where necessary, a conductive coating film is formed directly or indirectly through a panel to form an anode, and a cathode made of a conductive material such as metal is arranged at the bottom. An antifouling device for a seawater intake groove is provided with a means for continuously or intermittently energizing between both electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1306529A JPH07119447B2 (en) | 1989-11-28 | 1989-11-28 | Antifouling device for intake groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1306529A JPH07119447B2 (en) | 1989-11-28 | 1989-11-28 | Antifouling device for intake groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03169905A JPH03169905A (en) | 1991-07-23 |
| JPH07119447B2 true JPH07119447B2 (en) | 1995-12-20 |
Family
ID=17958123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1306529A Expired - Lifetime JPH07119447B2 (en) | 1989-11-28 | 1989-11-28 | Antifouling device for intake groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07119447B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100187600B1 (en) * | 1991-07-24 | 1999-06-01 | 쿠니야스 테루히사 | Method for preventing coloring of aquatic organisms and apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6233366B2 (en) | 2015-08-12 | 2017-11-22 | 富士通オプティカルコンポーネンツ株式会社 | Light modulator |
-
1989
- 1989-11-28 JP JP1306529A patent/JPH07119447B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6233366B2 (en) | 2015-08-12 | 2017-11-22 | 富士通オプティカルコンポーネンツ株式会社 | Light modulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03169905A (en) | 1991-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Humble | The cathodic protection of steel piling in sea water | |
| KR930008997B1 (en) | Antifouling devices of objects in contact with seawater | |
| CA2092304C (en) | Prevention method of aquatic attaching fouling organisms and its apparatus | |
| CN100355987C (en) | Apparatus for preventing adhesion of marine organism, composite plate for preventing adhesion of marine organism and method for installing the apparatus | |
| US4539078A (en) | Method of and apparatus for making a synthetic breakwater | |
| JPH07119447B2 (en) | Antifouling device for intake groove | |
| JP2544465B2 (en) | Antifouling device for intake groove | |
| US4946570A (en) | Ceramic coated strip anode for cathodic protection | |
| JP5506592B2 (en) | Biological adhesion prevention method and biological adhesion prevention apparatus | |
| JPH09125341A (en) | Corrosion and dirt preventing device for sea water inlet channel | |
| JP2520779B2 (en) | Anticorrosion and antifouling method for underwater steel structures | |
| JP2601807B2 (en) | Antifouling device and antifouling / anticorrosion device for structures in contact with seawater | |
| JP3386898B2 (en) | Corrosion protection structure of the material to be protected | |
| JP2809351B2 (en) | Antifouling and anticorrosion methods for hull skin in contact with seawater | |
| JPS63101464A (en) | Electrically conductive coating film for use in electrolysis of sea water | |
| JPH0752167Y2 (en) | Replaceable energizing antifouling cover for offshore structures | |
| JPS62263985A (en) | Electrolytic protection method for concrete structure | |
| JP4438158B2 (en) | Antifouling method for concrete structure and antifouling device for seawater conduit of concrete structure | |
| JP3207718B2 (en) | Marine organism adhesion prevention coating | |
| JPH02196868A (en) | Antifouling device for structure contacting with sea water | |
| JPH0224914B2 (en) | ||
| JPH0224913B2 (en) | ||
| RU2151820C1 (en) | Method for complex corrosion protection of isolated construction | |
| JPH03257214A (en) | Conductive panel for preventing contamination in intake channel | |
| JP3145390B2 (en) | Conductive film for seawater electrolytic antifouling equipment |