JPS5863732A - Corrosion-inhibiting foam - Google Patents

Abstract

PURPOSE:To provide a corrosion-inhibiting foam having light weight and high durability, formable freely to an arbitrary shape, and usable as various corrosionproof covers, by filling powder of a vapor-phase inhibitor in a synthetic resin foam. CONSTITUTION:The objective corrosion-inhibiting foam is prepared by filling powder of a vapor-phase inhibitor (e.g. ammonium nitrite) in a synthetic resin foam (e.g. styrene resin foam). The amount of the vapor-phase inhibitor is preferably 5-100wt% of the synthetic resin. EFFECT:Cushioning, corrosionproofing, and heat insulation of the packaged product.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anticorrosive foam containing a volatile rust preventive agent, which can be used as a packaging anticorrosion cover for metal products such as cameras, a heat insulating anticorrosion cover for metals, and the like.

Conventionally, the principle that vaporizable substances such as ammonium nitrite gasify and adhere to the metal surface Ew7 and prevents the metal surface from rusting by electrochemical action is known to Ikki. As an example of the application of a rust agent, anti-corrosive packaging paper has been proposed in which ammonium nitrite powder is applied to paper using a suitable adhesive.

The present invention provides an anti-corrosive foam that is lightweight, has sufficient durability, and can be freely formed into any shape such as a packing anti-corrosion cover, an insulating anti-corrosion cover, etc. The present invention will be explained in detail with reference to the drawings.

Foams used in the present invention include foams made of synthetic AT resins such as polystyrene J, urethane, vinyl chloride, polyethylene, silicone, and the like.

In addition, volatile rust preventives include IMfa#ammonium, dicyclohexylammonium nitrite, and jim@it.
lhexyl ammonium, isopobyl ammonium nitrite, diisopropylammonium nitrite, triethylammonium nitrite, etc., and these rust preventives W4
The above synthetic 111iI as a powder or granular material with a shape such as a powder or wrinkled material.
Encased in foam. The amount of the volatile rust preventive agent to be added is appropriately selected depending on the application, but it is preferably 1-100% (C weight ratio) based on the synthetic resin to be foamed.

Figure 1 shows M! on polystyrene resin beads. IIIl
Add and mix hexyl ammonium powder (weight ratio), and use this mixed composition to foam-mold the body + 17 and lid (8
).

When a camera (G), for example, is stored in the anti-corrosion packaging cover made of the 411 resin foam, the vaporized gas from the volatile rust preventive powder contained in the 411 resin foam will leak into the metal of the camera inside the packaging cover. It adsorbs to the surface and forms an electrochemically passivated film, thereby inhibiting corrosion of metal surfaces.

Figure 2 shows a semi-cylindrical heat-insulating and anti-corrosive cover (1a ), (1a) is coated with metal tube (iiK) and mutually KI! This is an example of a combination of

The third (2) is the same body (1b) and lid (2b) as in Figure 1.
) is provided with an impermeable film (3b) such as aluminum foil or synthetic resin film (3b) to prevent the porous rust preventive agent from escaping to the outside.

No.! I- is a heat-insulating and anti-corrosion cover (shi) similar to that shown in Fig. 2;
1G) on the surface of the metal tube), then the double force bar (L
This is an example in which a bonding tape (40) made of a non-breathable material such as synthetic resin is wrapped around the surfaces of a) and (le) to prevent the volatile rust preventive agent from escaping to the outside.

According to the anti-corrosion foam of the present invention, when it is used as a packaging anti-corrosion cover for metal products, a heat-insulating anti-corrosion cover for metal pipes, etc., the synthetic resin foam can provide cushioning protection for metal products,
In addition to insulating metal pipes, etc., the volatile rust preventive powder contained inside the synthetic resin foam gradually vaporizes, and the vaporized gas prevents corrosion of the metal products and metal pipes for a long period of time. In addition, the foam of the present invention is light and heavy, has sufficient durability, and can be freely formed into any shape, so it has its own advantages when used in various anti-corrosion covers. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a packing anti-corrosion cover, FIG. 2 is a slope view of a heat-insulating anti-corrosion cover for a pipe, and FIG. 3 is a cross-sectional view of another example of a packing anti-corrosion cover. 4th c
The figure is a view of another example of the heat insulating and anti-corrosion cover for the pipe, facing toward the enlarging machine Wk. Lu+i:+,'q

Claims (1)

[Claims] An anti-corrosion foam that contains powder and granules of a volatile rust preventive agent inside a synthetic resin foam.