JPH01203510A - Prevention of adherence of marine organism - Google Patents

Abstract

PURPOSE:To prevent the adherence and growth of marine organism by a method in which a paint containing dispersed inorganic powder or foil pieces having a cleaving property is coated on the surface of the part immersed in sea of a marine structure. CONSTITUTION:The surface of the part immersed in sea of a marine structure, e.g., oil fence, intake pipe for power generation, marine pier, etc., is coated with a film 2 wherein foil pieces 3 of cleavable material such as mica is dispersively contained. Barnacle 4, etc., as marine organism which adhere to the surface of the paint film are dropped away with the pieces 3 when attacked by external forces such as tidal waves or when the barnacle 4, etc., grow and its weight is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the amount of marine organisms that adhere to the surface of underwater parts of marine structures, marine facilities, etc.

Over time, marine organisms such as barnacles and mussels attach to and breed on the surface of underwater parts of marine structures, marine facilities, ships, or underwater objects.

When the amount of marine organisms attached increases, for example, ■ the inner diameter of the power company's water intake pipes or drainage pipes becomes smaller, leading to a decrease in water intake and drainage capacity; ■ inspection of the degree of rust on metal bodies, which leads to deterioration of strength, and local Problems may occur, such as making it difficult to repair items that should be used in a floating state, such as buoys, oil fences, fishing nets, etc. Therefore, conventionally, a marine organism adhesion prevention agent is applied to the surface of underwater parts of marine structures to prevent such a situation from occurring. Conventional marine biofouling prevention agents are toxic substances such as tin-based, copper-based, and arsenic-based substances that repel or kill biofouling due to their toxicity, and although they have a great antifouling effect, they have long-term effects. This causes marine pollution, disrupts the ecosystem, and causes malformations in marine life, including fish and shellfish. In order to prevent such adverse effects, a method of applying a non-toxic self-melting paint to the surface of underwater parts such as marine structures has also been used. Since self-melting paint gradually melts into water, it prevents living organisms from adhering to the painted surface.

1. The present invention was created against this technical background, and unlike self-melting paints which have the property of chemically dissolving in water, the present invention uses a substance that has the property of physically disintegrating. The purpose is to limit the amount of marine life that is present without adversely affecting the environment.

This purpose is like mica and talc! ! This is a method using an inorganic material that has cleavage properties.A paint containing dispersed powder or foil pieces of an inorganic material that has cleavage properties is applied to the surface of underwater structures, marine facilities, ships, or underwater parts of underwater objects. Method: ■Applying an adhesive material containing dispersed inorganic material foil pieces having a practical property to the surface of the underwater part of a marine structure, marine facility, ship, or underwater installation,■
A method of attaching a cloth impregnated with a solvent-based powder of an inorganic material having cleavage properties to cover the surface of an underwater part of a marine structure, marine facility, or underwater installation; ■ Inorganic material having cleavage properties A method of integrally molding cement or concrete mixed with powder or foil pieces of powder or foil pieces as a surface layer forming material of an underwater concrete body with the main body part; How to apply concrete to the surface of underwater concrete base ■! A method of attaching a rubber molded article or a synthetic resin molded article in which powder or foil pieces of an inorganic material having J-openability are dispersed to cover the surface of an underwater part of a marine structure, marine facility, ship, or underwater installation. , ■ Using an adhesive or adhesive material containing dispersed inorganic material powder or foil pieces that have cleavability, cover the surface of the underwater part of a marine structure, marine facility, ship, or underwater installation to form a molded body. This is achieved by employing a bonding method.

Mica crystals, which are typical crystals with cleavability, have a layered structure, with strong covalent bonds between SL-0 in the direction along the real plane, and weak interlayer ions in the direction perpendicular to the real plane. Since they are bonded, the layers easily peel off (vA open) in this direction, resulting in scale-like foil pieces.

In addition to the well-known natural mica, mica having such characteristics includes artificial mica (see the numerical table). Natural mica crystals are O
Although it has H groups, the one in which all the OH groups are replaced with fluorine is called fluorine mica, and it can be synthesized artificially. The method of the present invention utilizes the delamination properties of an inorganic material (hereinafter referred to as a material with interfold properties), which contains artificial mica, which absorbs water and swells when placed in water, and has interfold properties. Yes, to the extent that if the interfold material is applied to the surface of a marine structure together with other materials to cover the surface, marine life will adhere to it and be supported by foils of the interfold material. When they grow, they fall off due to their own weight or the action of external forces such as waves. An example is shown in FIG. 1 shows an underwater part of a marine structure, the surface of which is covered with a coating film 2 in which foil pieces 3 of a practical material are dispersed, and Fujibbo 4 is attached to the foil pieces 3 exposed on the surface of the coating film. I am supported by this. When an external force such as a wave acts on this Fujibbo 4, or when it grows further and its own weight increases, the foil piece 3
It falls off along with it. As mentioned above, various forms of application of the interfold material to the surface of marine structures and the like can be considered, but the principle of allowing marine organisms to adhere to and fall off from the foil piece of the interfold material is the same in all cases.

The objects to which the method of the present invention is applied are illustrated below.

Oil fence, silt fence (pollution diffusion prevention film),
Buoys, shells of underwater rigs 1 intake pipes and drainage pipes for power plants,
Undersea concrete structures (quays).

sea walls, breakwaters, etc.), offshore bridge piers, steel pipe piles, steel pipe sheet piles, sheet piles, mooring lobes, mooring chains, fishing nets.

Ship bottoms, offshore hoses for oil delivery, dredging piping and their connection hoses.

Various methods can be considered for covering the surface of the underwater portion of these applicable objects with an interfold material, as described below.

■ Disperse or knead powder or foil pieces of practical materials in paint, adhesive materials (e.g., those based on rubber or synthetic resin), adhesives, or cement (or concrete), and then apply it. A method of applying or coating the surface of the underwater part of an object (including a method by dipping).

■ Rubber, synthetic resin, or cement (or concrete) molded bodies (e.g., plate-shaped bodies, cylindrical bodies) made by dispersing or kneading powder or foil pieces of interfoldable materials are applied to underwater objects. A method of installing by covering the surface of the part.

■Wl! A method of attaching a molded body of rubber, synthetic resin, concrete, or metal to the surface of the underwater part of the target object using an adhesive or adhesive material containing dispersed powder or foil pieces of a nonwoven material as a medium.

■A method in which cement or concrete mixed with powder or foil pieces of an interfold material is integrally formed with the main body part as a surface layer forming body of an underwater concrete body.

■A method in which a cloth (woven or nonwoven) soaked in a solvent in which powder or foil pieces of interfold material are dispersed is attached to cover the surface of the underwater part of the target object.

Powder or foil pieces of interfold material dispersed in a base material such as a coating film or molded body that covers the surface of the object to be applied are also exposed and distributed on the surface of the base material.

When marine organisms grow attached to the surface of the base material and the powder or foil pieces of the interfold material, they fall off due to their own weight or external forces such as waves, as shown in FIG. 1. The critical adhesion amount of marine organisms that will cause this shedding is determined by the amount of the practical material blended into the base material; the larger the blend amount, the smaller the limit adhesion amount, and the smaller the blend amount, the larger the limit adhesion m.

In addition, rubber, synthetic resin, concrete, or metal moldings are attached to the underwater surface of the target object using an adhesive or adhesive material containing dispersed powder or foil pieces of practical materials. In such cases, marine organisms adhere to and grow on the surface of the molded body, and when the can exceeds its limit, it falls off due to its own weight or external force such as waves. The critical adhesion amount of marine organisms that will cause this shedding is determined by the amount of the adhesive or adhesive material blended into the adhesive or adhesive material. The amount of adhesion increases. After the molded body falls off, a new molded body may be installed.

Support - Lid - 1 Figures 2 to 4 show an oil fence 5 that is placed floating along the sea surface (in the figures, a two-dot chain line H indicates the height level of the sea surface). The oil fence 5 is, for example, 1
It is used as a long body made by sequentially connecting pieces of about 0 m in length, and it surrounds sea areas that are contaminated with oil or are likely to be contaminated, and prevents the oil from spreading to external sea areas.

The oil fence 5 includes floating bodies 7 (
A skirt part 8 equipped with a weight 9 extends from the upper half of a material (e.g., made of foamed resin) covered with an outer membrane 6 (e.g., rubber-coated canvas, resin-coated canvas), and is immersed in seawater. The entire area (8) is covered with a coating film 10 formed by dispersing foil pieces of an interfold material.

In the case of the oil fence 5 whose underwater portion is covered with a coating film 10 containing powder or foil pieces of an interfold material, the attached marine organisms may not grow large due to the delamination effect of the interfold material. Since the oil fence 5 falls off one after another, the overall weight does not become excessive and the oil fence 5 does not sink, thereby impairing its function as an oil fence. In addition, it is easy to manually remove attached marine organisms that have not yet grown to a large size, such as by lightly touching the marine organisms with a cleaning brush, or by shaking the oil fence 5 in seawater. Marine life falls off.

This method of controlling the adhesion of marine organisms by utilizing the interlayer delamination effect of interfold materials does not have to worry about polluting the environment.
Extremely useful.

11 Five Emperors 1 As is clear from the above explanation, the method of the present invention provides the following effects.

■A coating that covers the surface of underwater parts of marine structures.

Powder or foil pieces of interfold material dispersed or impregnated into a base material such as a molded body or cloth are exposed and distributed on the surface of the base material, and marine organisms are not only exposed to the base material but also between the folds. Because it also adheres to the powder or foil pieces of the plastic material, when the marine organisms grow to a certain extent, the powder or foil pieces will peel off due to their own weight or external forces such as waves, and the marine organisms will fall off. The interfold material is harmless to marine life and there is no concern about seawater contamination.

■Adhesives containing dispersed interfold material powder or foil pieces;
When a molded body of rubber, synthetic resin, concrete, or metal is attached to the surface of an underwater part of a marine structure using an adhesive material as a medium, marine organisms may attach and grow on the surface of the molded body. However, if the amount exceeds the limit, it will fall off due to its own weight or external forces such as waves. As stated in the previous section (■), the interfold material is harmless.

[Brief explanation of the drawing]

Figure 1 shows the foil pieces of interfold material dispersed in the coating that covers the surface of underwater parts of marine structures, etc., and the marine organisms attached and supported by the foil pieces. Figure 2 shows the underwater parts of marine structures. Figures 3 and 4 are side views of the main parts of an oil fence whose surface is coated with a coating film containing powder or foil pieces of an interfold material, respectively. It is a sectional view taken along IV-IV. 1... Undersea parts of marine structures, etc., 2... Paint film, 3.
...Foil piece, 4...Fujibbo, 5...Oil fence, 6...Outer coating, 7...Floating body, 8...Skirt part, 9...m weight, 10...painting film.

Claims (7)

[Claims] (1) Preventing the adhesion of marine organisms by applying a paint containing dispersed powder or foil pieces of an inorganic material having cleavability to the surface of the underwater part of marine structures, marine facilities, ships, or underwater objects. Method. (2) A marine method characterized by applying an adhesive material containing dispersed powder or foil pieces of an inorganic material having cleavability to the surface of an underwater part of a marine structure, marine facility, ship, or underwater installation. Biofouling prevention method. (3) A marine organism characterized by wearing a cloth impregnated with a powder of an inorganic material having cleavability using a solvent to cover the surface of an underwater part of a marine structure, marine facility, or underwater installation. How to prevent adhesion. (4) A method for preventing the adhesion of marine organisms, which comprises molding cement or concrete mixed with powder or foil pieces of an inorganic material having cleavability as a surface layer forming material of an underwater concrete body integrally with the main body. (5) A method for preventing the adhesion of marine organisms, which comprises applying cement or concrete mixed with powder or foil pieces of an inorganic material having cleavability to the surface of an underwater concrete base. (6) A rubber molded body or a synthetic resin molded body in which cleavable inorganic material powder or foil pieces are dispersed is attached to cover the surface of the underwater part of a marine structure, marine facility, ship, or underwater object. A method for preventing the adhesion of marine organisms. (7) Using an adhesive or adhesive material in which powder or foil pieces of an inorganic material having cleavability are dispersed, marine structures,
A method for preventing the adhesion of marine organisms, which comprises bonding and bonding a molded article to cover the surface of an underwater part of a marine facility, a ship, or an underwater object.