JPH09111479A - Method for preventing deposition of marine organism and its electrode body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deposition of marine organisms on the face of a structure in contact with seawater by fixing an electrode body formed by joining a noble- potential electrode plate to the surface of a base-potential electrode plate leaving the exposed surface to the face of a structure in contact with seawater through an insulating sheet. SOLUTION: A noble-potential electrode plate 2 (e.g. carbon plate) is placed on the surface of a base-potential electrode plate 1 (e.g. copper plate) leaving its exposed surface, and an insulating sheet 3 is put on the rear of the copper plate 1. A common through-hole is bored through the copper plate 1, carbon plate 2 and insulating sheet 3, and an insulating sheet 4 is mounted around the through-hole of the copper plate 1 and carbon plate 2. A mounting leg 5 having a tapped hole is laid on the rear of the insulating sheet 3, and a fixing bolt 6 is screw-joined to the female screw from the carbon plate 2 side through the through-hole to constitute an electrode body consisting of the four members. The electrode body is attached to a structure 7 in contact with seawater through the leg 5, hence an electric current flows between the copper plate 1 and carbon plate 2, electrolytic copper ion is eluted, and marine orgnanisms are not stuck on the structure 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater organism for a surface of a structure which is in contact with seawater, for example, an outer plate part of a hull below the water line or a seawater intake part in a seawater utilization facility such as a ship, an iron mill, a thermal power plant, The present invention relates to a method for preventing adherence and an electrode body thereof.

[0002]

2. Description of the Related Art As a method for preventing adherence of seawater organisms (antifouling method) to the surface of a structure which is in contact with seawater, the present applicant is the first
Using an electrode body consisting of an electrode plate and a second electrode plate, a DC voltage is applied to this electrode body to electrolyze seawater to generate active chlorine ions, and the active chlorine ions prevent adhesion of seawater organisms. It has been proposed (see Japanese Patent Laid-Open Nos. 4-83888 and 4-160175).

Further, conventionally, a method has been considered in which seawater is electrolyzed using copper as an anode and the adhesion of seawater organisms is prevented by the copper ions eluted thereby.

[0004]

By the way, in each of the above-mentioned conventional methods, a DC power supply device is required and an electric wire must be laid from the power supply device to the electrode body.

[0005]

The present invention has been made to solve the problems of the above-mentioned respective conventional methods, and the first gist of the present invention is that the surface of a base potential electrode plate is A method for preventing the adhesion of seawater organisms is to electrically insulate and fix an electrode body, which is integrally bonded to a noble potential electrode plate leaving an exposed surface, to a structure surface in contact with seawater.

The second gist of the present invention is to provide a base potential electrode plate, and a noble potential electrode plate integrally bonded to the surface of the base potential electrode plate, leaving the surface exposed surface.
An electrode body for preventing adhesion of seawater organisms, comprising an attachment leg integrally attached to the back surface of the base potential electrode plate via an insulating plate.

[0007]

1 is a front view showing an example of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. 1, as shown in FIGS. A noble potential electrode plate, for example, a carbon plate 2 is superposed on the surface of a base potential electrode plate, for example, a copper plate 1, leaving an exposed surface thereof, and an insulating plate 3 is superposed on the back surface of the copper plate 1.

The copper plate 1, the carbon plate 2, and the insulating plate 3
A common through hole is formed, and the insulating sleeve 4 is inserted through the through holes of the copper plate 1 and the carbon plate 2.

A mounting bolt 5 having a female screw hole is superposed on the back surface of the insulating plate 3, and a fixing bolt 6 is inserted from the carbon plate 2 side to the insulating plate 3 side through an insulating sleeve 4.
Is fixed to the female screw of the mounting leg 5 to integrally fix the carbon plate 2, the copper plate 1, the insulating plate 3 and the mounting leg 5 together, and the electrode body thus constructed is treated with seawater. The mounting leg 5 is attached by welding to the surface of the structure 7 that is in contact therewith.

Thus, by mounting the electrode body constructed as described above on the surface of the structure 7 in contact with seawater via the mounting legs 5, the copper plate 1 and carbon An electric current flows between the plate 2 and the exposed copper surface of the copper plate 1 to elute electrolytic copper ions, and the copper ions prevent the adhesion of seawater organisms to the structure 7 in contact with seawater and suppress the growth of seawater organisms. It can be done.

It should be noted that the size of the copper plate 1 in one electrode body is 150 mm × 300 mm × 2 mm, and the size of the carbon plate 2 is 80 mm × 300 mm × 2 mm in one electrode body, which maintains the effect of suppressing adhesion of seawater organisms. The period is about one year,
At this time, the dissolution amount of the copper plate 1 was half. For this reason, the useful life of the copper plate 1 is 2 years or more.

[0012]

According to the present invention described above, the base potential electrode plate is obtained by the battery action via seawater as an electrolytic solution without the need for a DC power supply device for the electrode body and a laying wire attached thereto. It is possible to elute electrolytic ions, which are effective in preventing the adhesion of seawater organisms and suppressing the growth of seawater organisms, from the exposed surface of the.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Copper plate 2 ... Carbon plate 3 ... Insulating plate 4 ... Insulating sleeve 5 ... Mounting leg 6 ... Fixing bolt 7 ... Structure contacting seawater

Claims (2)

[Claims] 1. An electrode body in which a noble potential electrode plate is integrally joined to the surface of a base potential electrode plate, leaving an exposed surface thereof, is electrically insulated and fixed to a structure surface in contact with seawater. A method for preventing adhesion of marine organisms, which comprises: 2. A base potential electrode plate, a noble potential electrode plate integrally bonded to the surface of the base potential electrode plate, leaving the surface exposed surface, and an insulating plate on the back surface of the base potential electrode plate. An electrode body for preventing the adhesion of seawater organisms, which is composed of a mounting leg that is integrally mounted as a unit.