JP2001079659A - Complex corrosion resistant plate material and method for fitting corrosion resistant plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the electrolytic corrosion while using thin corrosion resistant plate materials by coating a surface of a steel plate forming plural grooves on the surface with an insulating adhesive, fitting plural strips having projections for fitting to the grooves, into the grooves and welding the corrosion resistant plate material so as to cover a gap interval between the strips on the surface of the strips. SOLUTION: On a steel plate 3, a plurality of grooves 2 are parallel formed, and the insulating adhesive 4 is applied on the surface of the steel plate 3. Plural titanium strips 6 formed as U-shaped cross section in both side edge parts are fitted into the grooves 2 with the projections 5 for fitting into one pair of grooves 2. The titanium sheet material 7 is set so as to cover the steel plate 3 surface of the gap between the adjacent titanium strips 6 and this titanium sheet material 7 is lap-welded to the titanium strips 6 to obtain a complex corrosion resistant plate material 1. In the case of fitting plural lines of the complex corrosion resistant plate material 1 in the groove 2 direction, it is desirable to apply sealing material so as to cover the joining part between the lines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite corrosion-resistant plate used for marine structures and the like, and a method for mounting the corrosion-resistant plate.

[0002]

2. Description of the Related Art Marine structures such as harbor piers are required to have long-term and extreme corrosion resistance for several decades. Therefore, the splash zone of the pier is covered by welding titanium clad steel formed by pressing a titanium plate on a steel plate by a bombing method or a rolling method.

[0003]

However, according to the above method, when the splash zone is submerged in the sea, there is a possibility that electrolytic corrosion occurs due to electric conduction between the steel plate and the titanium plate.
In addition, titanium clad steel requires the thickness of the titanium laminated plate to be 1 mm or more due to the manufacturing process. However, this is excessive thickness from the viewpoint of corrosion resistance, which has caused a cost increase.

Accordingly, the present invention provides a composite corrosion-resistant plate and a method of mounting the corrosion-resistant plate, which enable the use of a corrosion-resistant plate having a thickness as small as possible, and ensure the insulation between different metals to prevent electrolytic corrosion. The purpose is to:

[0005]

In order to solve the above-mentioned problems, a first composite corrosion-resistant plate according to the present invention comprises a steel plate having a plurality of grooves formed on a surface thereof, and an insulating material covering the surface of the steel plate. A plurality of band-shaped plates having a protruding portion fitted in the groove, and a plurality of band-shaped plates fitted and bonded in the groove at predetermined intervals, so as to cover the space on the surface of each band-shaped plate. The composite corrosion-resistant plate is made of a titanium material for the strip-shaped plate and the corrosion-resistant plate.

In a first method of mounting a corrosion-resistant plate material according to the present invention, a surface of a steel plate having a plurality of grooves formed on the surface is coated with an insulating adhesive, and a protrusion fitted into the groove is formed. A method in which a plurality of strips having a predetermined interval are fitted and adhered to the grooves to insulate and insulate, and then a corrosion-resistant plate is welded to the surface of each strip to cover the gap. In addition, a titanium material is used for the strip-shaped plate and the corrosion-resistant plate.

According to the above-described method of mounting the composite corrosion-resistant plate and the corrosion-resistant plate, the strip-shaped plate and the steel plate are fitted and bonded via an insulating adhesive, and the corrosion-resistant plate is welded thereon. The strip and the corrosion resistant board are completely insulated, thus preventing galvanic corrosion. In addition, since the protruding part of the strip is fitted and bonded to the groove formed in the steel plate, the steel plate and the strip have a high bonding strength, and the corrosion resistance of the same type of metal to the strip is high. By welding the plates, it is possible to use corrosion-resistant plates as thin as possible.

Next, a second composite corrosion-resistant plate according to the present invention is a steel plate having a plurality of grooves formed on a surface thereof, an insulating adhesive covering the surface of the steel plate, and fitted in the grooves. It has a projecting portion, and this projecting portion is formed of a corrosion-resistant plate material fitted and bonded to the groove, and the butted portion of the corrosion-resistant plate material in the projecting portion is welded. Further, in the second method for mounting a corrosion-resistant plate material according to the present invention, the surface of a steel plate having a plurality of grooves formed on the surface is coated with an insulating adhesive, and a protruding portion that fits into the groove is formed. In this method, the protrusions of the corrosion-resistant plate are fitted and bonded to the grooves to be insulated, and then the butted portions of the corrosion-resistant plate in the protrusions are welded.

According to the above-described method of mounting the composite corrosion-resistant sheet and the corrosion-resistant sheet, the steel sheet and the steel sheet are completely insulated because the steel sheet and the steel sheet are fitted and bonded via the insulating adhesive. Corrosion is prevented. Also,
Since the corrosion resistant plate is integrally formed, it has high strength and is easy to manufacture.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A composite corrosion-resistant plate and a method of attaching the corrosion-resistant plate used in an offshore structure according to an embodiment of the present invention will be described below. First, FIGS. 1 and 2
Based on the above description, a description will be given of a method of attaching a composite corrosion-resistant plate and a corrosion-resistant plate to be provided in a marine structure or the like according to the first embodiment of the present invention, for example, a splash zone of a port pier.

As shown in FIG. 1, this composite corrosion-resistant plate 1
Is a steel plate 3 having a plurality of grooves 2 formed in parallel at predetermined intervals on the surface thereof, and an insulating adhesive for covering the surface of the steel plate 3 and insulating the steel plate 3 and a plate material to be joined thereto. 4, for example, an epoxy resin and a protruding portion 5 fitted to the pair of adjacent grooves 2 are formed in a U-shaped cross section on both side edges, and are fitted and adhered to the groove at predetermined intervals. A plurality of titanium strips 6 are installed so as to cover the surfaces (intervals) of the steel plates 3 between the adjacent strips 6, and both side edges are overlapped and welded to two adjacent strips 6. And a plurality of titanium plate members 7. As shown in FIG. 2, when the composite corrosion-resistant plate 1 having the above configuration is mounted in a plurality of rows in the groove 2 direction, a sealing material 8 is applied so as to cover a joint between the rows.

As described above, since the steel plate 3 and the titanium strip 6 are fitted and bonded through the insulating adhesive 4, the steel plate 3
And the titanium strip 6 and the titanium plate 7 attached to the surface thereof are completely insulated, thus preventing the occurrence of electrolytic corrosion, and even if moisture enters the space between the titanium plate 7 and the steel plate 3. In addition, it is possible to prevent corrosion of the splash zone portion of the pier. In addition, by using a titanium material which is the same kind of metal as the belt-shaped plate and the plate material provided on the surface thereof, welding with each other is facilitated, and sufficient welding strength can be ensured. For example, the thickness is less than 1 mm. Titanium plate material can be used.

Further, even when the composite corrosion-resistant plate 1 is mounted in a plurality of rows in the direction of the groove 2, the sealing material 8 is applied to the joints thereof to remove moisture from the joints between the rows. Prevents inflow. Next, a method of attaching the titanium plate material in the above configuration will be described. First, a plurality of grooves 2 are formed in parallel at predetermined intervals on a steel plate 3 installed in the splash zone portion of a port pier, and then the grooves 2 are formed.
The insulating adhesive 4 is applied to the surface of the steel plate 3 including the portion.
As the adhesive 4, for example, an epoxy resin is used.
Next, a plurality of titanium strips 6 having projecting portions 5 fitted into the grooves 2 formed on both side edges in a U-shaped cross section are fitted and bonded to the steel plate 3 at predetermined intervals. That is, since the adhesive 4 is applied to the entire steel plate, the titanium strip 6 is bonded not only to the protruding portions 5 but also to the entire strip. Then, the titanium plate 7 is placed on the surface of the titanium strip 6 so as to cover the surface (interval) of the steel plate 3 between the adjacent strips 6, and both side edges are overlapped and welded to the titanium strip 6. As a welding method here, laser welding or the like is used so that heat generated at the time of welding does not affect the adhesive.

When the above structure is mounted on the splash band portion in a plurality of rows in the groove direction, the sealing material 8 is applied so as to cover the joint between the titanium strip 6 and the titanium plate 7 between the rows. With the above configuration, when the conventional titanium clad steel is used, the thickness of the titanium laminated plate of the titanium clad steel becomes 1 mm or more due to the manufacturing process of the clad steel and the relationship of the heat input control of welding, and the expensive titanium Has been used more than required in terms of corrosion resistance. However, the titanium strip 6 and the steel plate 3 are fitted and bonded via an adhesive 4 so that the titanium strip 6 and the titanium plate 7 can be welded. 7 can be thin, for example, less than 1 mm. Therefore, since the thickness of the titanium material can be reduced, an increase in manufacturing cost can be suppressed.

Further, in the above embodiment, the groove 2 is
However, as shown in FIG. 3 or FIG. 4, a pair of adjacent grooves 2 can be inclined outward in a C-shape with respect to the surface of the steel plate 3 or as shown in FIG. The cross section can be inclined in an inverted C-shape. Further, a pair of adjacent grooves 2 may be inclined in the same direction with respect to the surface of the steel plate 3. By inclining the groove 2 in this manner, the bonding strength between the titanium strip 6 and the steel plate 3 can be improved.

Further, in the above embodiment, a pair of projecting portions are formed on both side edges of the titanium band-shaped plate, but the number and position of the projecting portions can be determined according to the size of the band-shaped plate. One protrusion may be formed at the center of the titanium strip. Next, a method for attaching the composite corrosion-resistant plate and the corrosion-resistant plate according to the second embodiment of the present invention will be described with reference to FIG.

First, the composite corrosion-resistant plate according to the present embodiment will be described. As shown in FIG. 5, the composite corrosion-resistant plate 11 has a steel plate 13 having a plurality of grooves 12 formed on the surface thereof in parallel at predetermined intervals, and a surface of the steel plate 13 covered with the steel plate 13. An insulating adhesive 14, for example, an epoxy resin, for insulating the plate material to be joined to the substrate material, and a titanium plate material 16 in which a plurality of U-shaped cross-sectional projections 15 fitted into the grooves 12 are press-formed, and The butted portion of the titanium plate material 16 in the protruding portion 15 is laser-welded to melt at least twice the plate thickness.

According to this configuration, as in the first embodiment, since the steel plate 13 and the titanium plate 16 are fitted and bonded via the insulating adhesive 14, the steel plate 13 and the titanium plate 16 are completely insulated. Thus, the occurrence of electrolytic corrosion is prevented.
Also, since the butted portion of the protruding portion 15 of the titanium plate 16 is welded to a depth of at least twice the thickness of the titanium plate 16, even if an excessive tensile force acts on the titanium plate 16, the fracture will not occur at the welded portion. It is not necessary to require an excessive joint in consideration of instability of the weld. Although not shown, similar to the first embodiment, when attaching the composite corrosion-resistant plate to a plurality of rows in the groove direction,
Apply sealant to the joints between the rows.

Next, a method of mounting the titanium plate material in the above configuration will be described. First, a plurality of grooves 12 are provided at predetermined intervals on a steel plate 13 installed in a splash zone portion of a port pier.
Are formed in parallel, an insulating adhesive 14 is applied to the surface of the steel sheet including the groove. An epoxy resin or the like is used for this adhesive in the same manner as described above. Next, a titanium plate 16 having a plurality of protrusions 15 having a U-shaped cross section to be fitted into the groove is press-fitted and bonded to the groove 12.
Then, the butted portion of the titanium plate 16 in the protruding portion 15 is welded by laser welding so that at least twice the plate thickness of the titanium plate 16 is melted.

According to this configuration, since the integrally formed titanium plate 16 is attached to the steel plate 13, the manufacture is easy. Further, similarly to the first embodiment, the steel plate 13
Since the titanium plate 16 and the titanium plate 16 are fitted and bonded via the insulating adhesive 14, the thickness of the titanium plate 16 can be reduced to, for example, less than 1 mm. Since the butted portion of the titanium plate 16 was laser-welded, the U-shaped opening in the protruding portion 15 was closed, and the lower portion of the protruding portion 15 was in a swelling state. The engagement between the groove 15 and the groove 12 is stronger.

Further, in each of the above embodiments, the example of the composite corrosion-resistant plate provided in the splash zone portion of the harbor pier has been described, but the chemical machine, the roof of the building, the food and the chemical which require long-term corrosion resistance are required. It may be used for containers in the field.

[0022]

As described above, according to the structure of the present invention, the strip plate and the steel plate are fitted and bonded via the insulating adhesive, and the corrosion-resistant plate material is welded thereon. And the corrosion resistant plate is completely insulated, thus preventing galvanic corrosion. In addition, by joining the strip-shaped plate and the steel plate with an adhesive and welding the corrosion-resistant plate of the same kind of metal to the band-shaped plate with the band-shaped plate, the thickness of the corrosion-resistant plate can be reduced, thereby suppressing an increase in cost. Can be.

Further, the steel plate and the band-shaped plate have high joining strength because the protruding portions of the band-shaped plate are fitted and bonded to the grooves formed in the steel plate. Furthermore, the performance as a composite corrosion-resistant plate can be further improved by making the strip-shaped plate and the corrosion-resistant plate a titanium material having high corrosion resistance. In addition, the corrosion-resistant plate material having the protrusions is fitted and bonded to the steel plate,
By welding the butted portion of the corrosion-resistant plate material at the protruding portion, in addition to the above-described operation and effect, since the integrated corrosion-resistant plate material is attached to the steel plate, it has high strength and is easy to manufacture.

[Brief description of the drawings]

FIG. 1 is a sectional view of a composite corrosion-resistant plate according to a first embodiment of the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a cross-sectional view of a main part of a modified example of the composite corrosion-resistant plate according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a modified example of the composite corrosion-resistant plate according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a composite corrosion-resistant plate according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite corrosion resistant plate 2 Groove 3 Steel plate 4 Insulating adhesive 5 Projection 6 Titanium strip 7 Titanium plate 8 Sealing material 11 Composite corrosion resistance plate 12 Groove 13 Steel plate 14 Insulating adhesive 15 Projection 16 Titanium plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Morihiko Osawa 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Ihara et al. 1-chome Minami-Kohoku, Suminoe-ku, Osaka-shi, Osaka No. 7-89 F-term in Hitachi Zosen Corporation (reference) 4E001 AA03 CB04 CC04 4E081 YB10

Claims (6)

[Claims] 1. A steel sheet having a plurality of grooves formed on a surface thereof, an insulating adhesive covering the surface of the steel sheet, and a protruding portion fitted into the groove. A composite corrosion-resistant plate comprising: a plurality of band-shaped plates fitted and adhered to each other; and a corrosion-resistant plate material welded to a surface of each of the band-shaped plates so as to cover the gap. 2. The composite corrosion-resistant plate according to claim 1, wherein the strip-shaped plate and the corrosion-resistant plate are titanium materials. 3. A steel sheet having a plurality of grooves formed on a surface thereof, an insulating adhesive covering the surface of the steel sheet, and a projection fitted into the groove. A composite corrosion-resistant plate comprising a corrosion-resistant plate which is fitted and bonded to the base plate, and a welded portion of the corrosion-resistant plate in the projecting portion is welded. 4. A steel plate having a plurality of grooves formed on its surface is coated with an insulating adhesive, and a plurality of strip-shaped plates having projections fitted into said grooves are provided at predetermined intervals in said grooves. A method for mounting a corrosion-resistant plate, wherein the corrosion-resistant plate is welded to the surface of each of the strip-shaped plates so as to cover the gap. 5. The method according to claim 4, wherein the strip-shaped plate and the corrosion-resistant plate are titanium materials. 6. A steel sheet having a plurality of grooves formed on its surface is coated with an insulating adhesive, and the protrusions of the corrosion-resistant plate formed with protrusions to be fitted in the grooves are formed in the grooves. A method for attaching a corrosion-resistant plate, wherein the butted portion of the corrosion-resistant plate is welded at the protruding portion after being fitted and insulated.