JP3378161B2 - Organic resin sheet coated anticorrosion material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel anticorrosion material used mainly in marine environments and river environments. More specifically, the present invention relates to anticorrosion by coating an organic resin sheet, and more particularly to an anticorrosion material that is cheaper and more reliable than conventional materials.

[0002]

2. Description of the Related Art Steel materials used in the marine environment and river environment include H-section steel, steel pipes, steel pipe sheet piles, steel sheet piles, etc., and many of them are landfills, river retaining walls, piers in harbors, piers, etc. Is used in the field of. When these are exposed to seawater or river water, it is general that some kind of anticorrosion is applied as a countermeasure against corrosion of steel materials. As the anticorrosion method, an electrocorrosion method and an anticorrosion method using an organic film are mainly used. The cathodic protection method is an extremely general method for corrosion protection of steel materials in the ocean and rivers. For example, as described in detail in "Corrosion Engineering" by Shigeru Kijima (Nikkan Kogyo Shimbun, 1982), Is a method of welding a metal having a base potential lower than that of iron, for example, zinc or aluminum, and preventing corrosion of the steel material by elution of these metals.

The organic coating anticorrosion method includes heavy-duty anticorrosion coating and resin lining method, and the basic constitution and construction examples are described in "Latest Surface Treatment Technology Guide" edited by the latest Surface Treatment Editing Committee (Industrial Technology Service Center, Showa era). 62)), the outline is that the surface of the steel material is subjected to a base treatment such as blasting or chromating, an undercoat organic resin layer is applied, and a paint or an organic material such as polyethylene is applied on top of it. This is a method of thickly coating a resin layer to prevent corrosion, and is a method of laminating at least two layers, and in the case of a large number, about seven layers.

[0004]

In the above-mentioned conventional cathodic protection method, it is necessary to periodically replace the electrodes, and maintenance is complicated. On the other hand, in the organic anticorrosion method, the manufacturing process is complicated, and it takes time and cost, and in general, special equipment is required. When steel materials are used in the marine environment or river environment, it is essential to process the materials at the site where they are used, and there has been a demand for an anticorrosion material that can be used inexpensively and easily without using complicated equipment at the site.

Conventionally, several methods have been proposed for this purpose, and one of them has been proposed in Japanese Patent Laid-Open No. 58-2991.
1 having a three-layer structure as disclosed in Japanese Patent No.
There is an anticorrosion construction method for marine steel structures that uses a body-molded anticorrosion body to prevent corrosion. Further, as a method for attaching the molded body to a steel material, Japanese Patent Laid-Open No. 54-86910 discloses a method in which a bolt is previously welded to the anticorrosion body and then fixed. In these methods, it is necessary to prepare a one-body molded anticorrosion body that matches the shape of the corrosion-resistant steel material in advance, so the shape of the corrosion-resistant steel material is limited, and on-site work also requires complicated steps. Met.

As a method for solving such a problem, Japanese Patent Application Laid-Open No. 60-230435 discloses a protective sheet in which a through hole for a screw body is provided on a surface of a shaped steel in which a screw body is implanted and a liquid hardening resin is used. A method of sandwiching and fixing between the two is disclosed. However, in this method, the screw body must be attached to the steel to be protected in advance, and the use of the liquid hardening resin makes the work on site extremely complicated,
It is difficult to reduce the price and shorten the construction period. Therefore,
It is an object of the present invention to provide an anti-food material that can be manufactured by a simple operation on site.

[0007]

In order to provide an anticorrosive material which can be produced by a simple process on site, the present invention provides
A sheet made of organic resin is pressed onto the steel material, and is fixed to the surface of the steel material with studs from above the pressing material. As a result of various studies on the shapes of the organic resin sheet and the pressing member and the tacks for fixing, the inventors of the present invention combine the shape and material of the organic resin resin sheet and the pressing member, and the steel tacks. As a result, it is possible to provide an organic sheet anti-food material that can be easily produced at the construction site, prevents water from entering, and prevents corrosion of steel materials.

That is, the organic resin sheet coated anticorrosion material of the present invention has a tensile elongation of 50% or more, a tensile breaking strength of 100 kgcm ^-2 or more, and a thickness of 1 mm on the surface of a steel material.
A pressing member having a strip-shaped projection is provided on the organic resin sheet having a length of 10 mm or less, and at least two or more steel tacks penetrate the pressing member and the organic resin sheet and bite into the steel material. Organic resin seals that are driven like
The coating material has a thickness of 0.5.
mm or more and less than 7 mm thickness, height of 5 mm or more and 80 mm or less
Full, FRP resin with a band-shaped protrusion with a length of 15 cm or more
Pressing material or thickness of 0.1 mm or more and 3 mm or more
Less than, height 5mm to less than 80mm, length 15cm
The present invention is characterized in that it is a stainless steel pressing member having the above band-shaped projections .

On the steel surface side of the organic resin sheet,
A laminate of resin sheets containing an anticorrosive is also the organic resin sheet-coated anticorrosive material of the present invention. The organic resin sheet, polyolefin resin, polyurethane resin, or polyvinyl chloride resin is preferably used. The resin sheet containing the above anticorrosive agent preferably has a fiber sheet containing petrolatum paste or a fiber sheet impregnated with a rust preventive paste containing tannic acid to enhance the anticorrosion effect.

The steel studs may be covered with a room temperature-curable epoxy-based or room-temperature-curable urethane-based organic resin to prevent corrosion, or the inner surface may be covered with a room-temperature-curable epoxy-based or room-temperature-curable epoxy resin. It is preferable to cover with a cap made of a resin or a sintered material filled with an adhesive of urethane type or α-cyanoacrylate type.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The reasons for limitation of the present invention will be described below. The organic resin sheet coated anticorrosive material of the present invention is shown in FIG.
As shown in FIG. 1, the organic resin sheet 2 and the pressing material 3 are sequentially stacked on the steel material 1, and the steel tack 5 is struck from the pressing material 3 side while the tip bites into the steel material 1 to make the organic resin. The sheet 2 and the pressing material 3 are in close contact with the steel material 1. The organic resin sheet 2 has a thickness of 1 from the viewpoint of its construction.
It is specified to be 10 mm or more and less than 10 mm. When the thickness is less than 1 mm, it is difficult to adhere it to the steel material without causing wrinkles or floating during the construction at the site, and when the thickness is 10 mm or more, it is difficult to cover with the tack via the pressing material.

The mechanical properties of the organic resin sheet are specified such that the tensile elongation is 50% or more and the tensile breaking strength is 100 kgcm ^-2 or more. It has a tensile elongation of less than 50% or a tensile breaking strength of 100k.
This is because if it is less than gcm ⁻² , it cannot withstand the deformation and often breaks or cracks when it is struck with a pressing material. As the organic resin sheet having these characteristics, a polyolefin resin, a polyurethane resin, a polyvinyl chloride resin, or the like corresponds. It is essential that these resins also contain a plasticizer in an appropriate amount and have the above-mentioned mechanical properties, and conversely, other than these, as long as they have the above-mentioned mechanical properties, they can be applied.

The organic resin sheet has an anticorrosion property by preventing invasion of water and dissolved oxygen even if it is used alone. However, by further laminating a resin sheet containing an anticorrosive agent on the inner surface thereof, it is possible to impart further excellent corrosion resistance. Will be possible. At this time, as the resin sheet containing the anticorrosive agent, a non-woven sheet impregnated with a petrolatum paste which has a high viscosity and is hard to be transformed for a long time is desirable. A fiber sheet impregnated with a rust preventive paste containing tannic acid is also effective, though the performance is slightly inferior to this.

Next, as the pressing material 3 for closely adhering the organic resin sheet to the steel material, the cross-section strength is such that the organic resin sheet can be sufficiently adhered to the steel material even if the interval between the tacks 5 is widened. Required. Therefore, the cross-sectional shape on the plane of the organic resin sheet is, for example, L-shaped (FIG. 2),
Alternatively, the strip-shaped projection 4 having an inverted T shape (FIG. 1) or the like is provided.
The specific size and shape of the strip-shaped protrusions differ depending on the material of the pressing member 3, particularly the strength. The material is FR
The one made of P is most effective, and in that case, it is essential to have a band-shaped projection having a projection thickness of 0.5 mm or more and less than 7 mm, a projection height of 5 mm or more and less than 80 mm, and a length of 15 cm or more. Become. If it is less than 0.5 mm, the pressing material has a high probability of breaking, and if it is 7 mm or more, the stud cannot be firmly fixed to the steel material. Even if the length is short, there is no problem, but from the viewpoint of cross-sectional strength, 15 cm or more is suitable for practical use. The thickness of the pressing member is often the same as the thickness of the protrusions, but different thicknesses do not pose a problem. Even in that case,
It must be greater than 0.5 mm and less than 7 mm thick. The width of the pressing member must be equal to or larger than the width of the stud and the thickness of the protrusion because a flat portion for hitting the stud is required. 20m practically
m or more is required, and there is no problem if it is wide, but 100 mm
The following are appropriate:

Further, the stainless steel (SUS) presser material is inferior in performance to the FRP material due to the problem of corrosive contact with dissimilar metals, but it can be sufficiently used. The shape in this case is also required to be L-shaped or inverted T-shaped, like the FRP.
Also in that case, if the thickness is 0.1 mm or more and less than 3 mm,
It is essential to have a band-shaped projection having a height of 5 mm or more and less than 80 mm and a length of 15 cm or more. If it is less than 0.1 mm, the pressing plate will be greatly deformed and the adhesive force will be reduced, and conversely it will be 3 mm.
With the above, insufficient tacking will occur. As with the FRP, a length of 15 cm or more is suitable for practical use. The thickness of the pressing member is often the same as the thickness of the protrusion as in the case of FRP, but there is no problem if it is different. Even in that case, 0.
It must be at least 1 mm thick and less than 3 mm thick. The width of the pressing member must be equal to or larger than the width of the stud and the thickness of the protrusion because a flat portion for hitting the stud is required. Practically, it is required to be 20 mm or more, and there is no problem if it is wide, but 100 mm or less is suitable. The strip-like shape of the protrusions is preferably linear in the length direction as shown in FIG. 1 or FIG. 2, but is not limited to this and may be any shape as long as the cross-sectional strength can be secured. It doesn't matter.

Next, in the present invention, as a means for bringing the organic resin sheet 2 into close contact with the steel material 1 by using the pressing material 3, the steel tacks 5 are driven into the steel material 1 so as to bite into them. Tack 5
Any shape can be used as long as it can cut into the steel material 1, but the one that can be shot with a drive-it gun is most suitable. This tack is made of steel,
Contact with seawater may cause long-term corrosion and fall out.
Therefore, the head of the tack is covered with a room temperature curing type epoxy resin or a room temperature curing urethane resin, or the surface of the tack is filled with the organic resin 7 as shown in FIG.
You may prevent corrosion by covering with. As the organic resin 7 to be filled, a room temperature curing type epoxy resin,
Or, a room temperature-curable urethane-based or α-cyanoacrylate-based adhesive is suitable. As the cap 6,
From the perspective of corrosion of dissimilar metals, metal materials are a problem,
For example, a cap made of polyethylene, polyvinyl chloride, a resin such as an ethylene-propylene copolymer, or a cap made of a sintered material such as porcelain can be applied.

[0017]

EXAMPLES The present invention will be described below with reference to examples. Real Sheet Pile
A 500mm x 100mm sample cut from the web
On the test material, the anticorrosion layer, the organic resin sheet layer, and the pressing plate
Hey, with a Drive It rivet gun, as shown in Table 1.
Three test materials were prepared for each. Organic resin used
The sheet is FRP; made of FRP, elongation 3%, tensile strength
3000 kgcm^-2, EP; made of epoxy resin, elongation 5
%, Tensile strength 800 kgcm^-2, PE; Polyethylene
Made of resin, elongation 300%, tensile strength 150kgcm
^-2, PU; Polyurethane resin, elongation 200%, tensile
Strength 60kgcm^-2, CB; made of polyvinyl chloride resin,
Elongation 60%, tensile strength 250kgcm^-2That one
I used each one. Anticorrosion layer is PP; Petrolatum paste
When using, TA; rust preventive paste containing tannic acid
The case where it was used and the case where no anticorrosion method was used were examined.

The periphery of the tacks of these test materials was visually observed and evaluated in three stages to evaluate the workability. The evaluation criteria are x: cracking + peeling Δ: cracking and no peeling ◯; no cracking + peeling. The corrosion resistance was evaluated in three grades by immersing these test pieces in a 40 ° C. NaCl aqueous solution for 3 months, peeling off the coating of the test material, and corroding the steel material in the coated portion. The evaluation criteria are: x: red rust is generated on all surfaces Δ: red rust is generated ◯: red rust is not present, black rust is present ◎: rust is not generated. The results of evaluation are shown in Table 1. As is clear from this,
Each of the materials of the present invention has a workability of ◯ and a corrosion resistance of ◯ or ◎, and has extremely excellent workability and corrosion resistance.

[0019]

[Table 1]

[0020]

The organic resin sheet-coated anticorrosive material of the present invention comprises:
It can be installed easily and cheaply on site, and the corrosion resistance of steel is excellent.

[Brief description of drawings]

FIG. 1 is an example (perspective view) of an organic resin sheet-coated anticorrosive material of the present invention,

FIG. 2 is a view showing an example of a pressing member having an L-shaped cross section,

FIG. 3 is a sectional view of an organic resin sheet anticorrosive material of the present invention.

[Explanation of symbols]

1 steel 2 Organic resin sheet 3 Pressing material 4 Band-shaped projections provided on the holding plate 5 steel tacks 6 Caps that cover the tacks 7 Anticorrosive to be filled

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiyuki Harada 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Hisao Yamashita 2-6 Otemachi, Chiyoda-ku, Tokyo 3 Inside Nippon Steel Co., Ltd. (72) Inventor Hiroyuki Hasegawa 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Co., Ltd. (72) Takahito Akiga Tobata-cho, Tobata-ku, Kitakyushu, Fukuoka 1-1 New Nippon Steel Co., Ltd. Yawata Works (72) Inventor Akihiro Saito 1-12-20-323 Honkitakata, Ichikawa City, Chiba Prefecture (72) Inventor Masao Muratani Minamihachibanen, Denenchofu, Ota-ku, Tokyo No. Japan Drive It Co., Ltd. (72) Inventor Kazuyuki Doi 603-1 Budako, Iruma City, Saitama Prefecture Iruma Riverside 11-106 (72) Inventor Yoshimi Funayama Otsuga, Numanan-cho, Higashi Katsushika-gun, Chiba Prefecture Hill 3-17-13-201 (56) Reference JP-A-60-246930 (JP, A) JP-A-3-218815 (JP, A) JP-A-60-230435 (JP, A) JP-A58 -29916 (JP, A) JP-A-1-158121 (JP, A) Actual development Sho 63-104444 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 15/08 E02D 31/06

Claims (6)

(57) [Claims] 1. A pressing material having an organic resin sheet having a tensile elongation of 50% or more, a tensile rupture strength of 100 kgcm ⁻² or more, and a thickness of 1 mm or more and less than 10 mm on a surface of a steel material, and having a band-shaped projection thereon. the provided which at least two or more steel rivets, through the pressing member and the organic resin sheet, the organic resin which is Dabyo as bite into the steel
A sheet-covered food material, wherein the pressing material has a thickness
0.5 mm or more and less than 7 mm thick, height 5 mm or more and 80 m
FRP with strip-shaped projections less than m and 15 cm or more in length
Resin pressing material or thickness of 0.1 mm or more and 3 m
less than m thickness, height 5 mm or more and less than 80 mm, length 15
It is a stainless steel pressing material having a band-shaped protrusion of cm or more.
The organic resin sheets coated anticorrosion material, characterized in that that. 2. A resin sheet containing an anticorrosive agent is laminated on the steel material surface side of the organic resin sheet.
The organic resin sheet-coated anti-corrosion material described. 3. The organic resin sheet-coated anticorrosive material according to claim 1, wherein the organic resin sheet is made of a polyolefin resin, a polyurethane resin, or a polyvinyl chloride resin. 4. The organic resin according to claim 2, wherein the resin sheet containing an anticorrosive is a fiber sheet containing a petrolatum paste or a fiber sheet impregnated with a rust preventive paste containing tannic acid. Sheet coated anti-food materials. 5. A steel tack is attached to a room temperature curing type epoxy
Or it should be covered with a room temperature curable urethane-based organic resin.
5. An organic resin sheet coated protective film according to claim 1, wherein
Foodstuff. 6. A steel tack and an inner surface of a room temperature curing type epoxy.
Type, room temperature curing urethane type, or α-cyanoac
Made of resin or sintered material filled with relate adhesive
5. The cap according to claim 1, wherein the cap is covered.
Organic resin sheet coated anti-food materials.