CN112266662A

CN112266662A - Self-plugging water-based antirust coating and preparation method thereof

Info

Publication number: CN112266662A
Application number: CN202011106585.7A
Authority: CN
Inventors: 黎诗剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-01-26

Abstract

The invention discloses a self-plugging water-based antirust paint and a preparation method thereof, belonging to the technical field of paints, the invention can be used for sensing that cracks appear on a coating by filling a self-plugging ball in the water-based paint, then the external air enters and reacts with a self-heating material bag in a sensing pipe rapidly, so that oxygen in the air can be consumed in time, meanwhile, heat is released by reaction and is conducted into a plugging ball through a heat-conducting carbon fiber bundle, the filling material in the pores of the inflatable ball is heated at a fixed point to force the filling material to be decomposed continuously to generate gas, the gas pressure in the pores is increased continuously until the plugging film layer on the outer side is broken, the fractured plugging film layer is driven to be filled into the cracks together, the air in the cracks is removed, the cracks are plugged simultaneously, and metal substances in the plugging film layer can react with the external air to generate a compact oxide film, prevent the air from spreading to the inside, thereby forming good antirust effect and prolonging the service life of the antirust paint.

Description

Self-plugging water-based antirust coating and preparation method thereof

Technical Field

The invention relates to the technical field of coatings, in particular to a self-plugging water-based antirust coating and a preparation method thereof.

Background

The coating is traditionally named as paint in China. The coating is a continuous film which is coated on the surface of an object to be protected or decorated and can form firm adhesion with the object to be coated, and is a viscous liquid which is prepared by taking resin, oil or emulsion as a main material, adding or not adding pigments and fillers, adding corresponding auxiliaries and using an organic solvent or water.

The antirust coating is a coating which can protect the metal surface from chemical or electrochemical corrosion of the atmosphere, seawater and the like. The antirust coating is coated on the metal surface, so that direct invasion of various corrosive substances in the atmosphere can be effectively avoided, and the service life of the metal is prolonged to the maximum extent. It can be divided into two main categories of physical and chemical antirust paints. The former forms a compact paint film by properly matching the pigment and the paint to prevent corrosive substances such as iron oxide red, aluminum powder, graphite antirust paint and the like; the latter depends on the chemical rust inhibiting effect of the rust inhibiting pigment, such as red lead, zinc yellow rust-inhibiting paint, etc. The antirust paint is used for antirust of metals such as bridges, ships, pipelines and the like.

However, the existing antirust coating has the characteristics of poor weather resistance, easy falling off and no adaptability to complex and severe environments, and particularly when cracks and other phenomena occur, the antirust effect is rapidly reduced, and effective antirust on the metal surface cannot be realized.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a self-plugging water-based antirust paint and a preparation method thereof, which can improve the strength and weather resistance of the paint by filling a self-plugging ball in the water-based paint, are not easy to fall off on the metal surface, and can quickly react with a self-heating material bag in a sensing pipe after sensing that the crack appears on the paint, so that oxygen in the air can be consumed in time, heat is released by reaction and is conducted into the plugging ball through a heat-conducting carbon fiber bundle, a filling material in the pore of the inflatable ball is heated at a fixed point to be continuously decomposed to generate gas, the gas pressure in the pore is continuously increased until the plugging film on the outer side is broken, the cracked plugging film is driven to fill the crack together, and the crack is plugged while the air in the crack is driven away, and the metal substance in the caulking film layer can react with the outside air to generate a compact oxidation film to prevent the air from spreading to the inside, thereby forming a good antirust effect and prolonging the service life of the antirust coating.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The self-plugging water-based antirust coating comprises the following raw materials in parts by weight: 30-40 parts of styrene-acrylic emulsion, 15-25 parts of inorganic filler, 10-14 parts of pigment, 3-5 parts of barium sulfate, 1-3 parts of rare earth metal oxide, 0.5-1.5 parts of defoaming agent, 0.2-0.4 part of dispersing agent, 2-4 parts of film forming agent, 15-25 parts of deionized water and 16-24 parts of self-plugging embedded ball.

Further, the inorganic filler is any one or a combination of mica powder, wollastonite powder, talcum powder, kaolin or bentonite.

Further, the pigment is any one of iron oxide red, titanium dioxide, carbon black and alumina powder.

Further, the rare earth metal oxide is any one or a combination of lanthanum oxide and cerium oxide.

Further, the defoaming agent is tributyl phosphate or water-based silicone oil, the dispersing agent is polyisobutylene diacid salt, and the film forming agent is ethylene glycol ethyl ether or ethylene glycol butyl ether.

Further, from caulking joint ball joint includes caulking joint ball and many perception pipes, and many perception pipe ring array distribute in the surface of caulking joint ball, and the perception pipe plays the cracked effect of perception coating, improves the compactness between the coating simultaneously, and when the caulking joint ball played improvement coating intensity, can trigger the caulking joint action to prevent the erosion of outside air to inside.

Furthermore, the caulking joint ball comprises a reinforcing outer ball, a caulking joint film layer and an inflatable inner ball, the caulking joint film layer and the reinforcing outer ball are sequentially covered on the outer end of the inflatable inner ball, the sensing tube comprises a polypropylene hollow fiber tube and a brittle fracture coating, the reinforcing outer ball is provided with a plurality of air holes matched with the polypropylene hollow fiber tube, and the polypropylene hollow fiber pipe is connected with the air holes, the brittle fracture coating film is wrapped at one end, far away from the air holes, of the polypropylene hollow fiber pipe, the reinforcing outer ball has higher strength to play a role in supporting and shaping, the crack blocking film layer is used for uniformly distributing active metal powder outside the inflatable inner ball, the inflatable inner ball is used for triggering crack blocking action, the brittle fracture coating film is used for wrapping and protecting the polypropylene hollow fiber pipe in a normal state, the phenomenon that external coating components enter the polypropylene hollow fiber pipe to cause blockage is avoided, and the brittle fracture coating film can be cracked to open the polypropylene hollow fiber pipe when being impacted.

Further, it has a plurality of heat conduction carbon fiber bundles that extend to in the polypropylene hollow fiber pipe to inlay on the caulking rete, heat conduction carbon fiber bundle is kept away from caulking rete one end parcel and is had self-heating material package, and self-heating material package can carry out oxidation reaction with the air that the external world came in to produce certain heat and conduct to caulking rete department through heat conduction carbon fiber bundle, thereby fixed point is to inside aerifing the inner ball and is heated the accurate caulking action that triggers.

Furthermore, the reinforcement outer ball is made of silicon dioxide, the caulking film layer is formed by bonding active metal powder, the active metal powder is any one or combination of zinc powder, zinc alloy and aluminum powder, the inflatable inner ball is made of porous ceramic materials, substances which are decomposed to generate gas when being heated are filled in pores of the porous ceramic materials, the filling substances in the pores of the porous ceramic materials are continuously decomposed to generate gas after being heated, the caulking film layer on the outer side is broken until being extruded along with the continuous increase of air pressure in the pores, and the fractured caulking film layer is driven to be filled into the crack together, so that the crack is blocked while air in the crack is removed.

A preparation method of a self-plugging water-based antirust coating comprises the following steps:

s1, weighing inorganic filler, rare earth metal oxide and dispersant, adding into deionized water, uniformly stirring, mixing and dissolving for 5-15min, slowly adding pigment and barium sulfate during stirring, and uniformly stirring for 30-60 min;

s2, weighing styrene-acrylic emulsion, a defoaming agent and a self-plugging embedded ball, mixing the styrene-acrylic emulsion, the defoaming agent and the self-plugging embedded ball with the solution in the step S1 in a vacuum environment or under the protection of nitrogen, and stirring at the rotating speed of 150-250r/min for 3-5 min;

s3, finally adding the film forming agent, stirring uniformly, and storing at 5-15 ℃.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can not only improve the strength and weather resistance of the coating and prevent the coating from falling off on the metal surface, but also can quickly react with the self-heating material bag in the sensing pipe after the coating is sensed to have cracks after the coating enters, so that oxygen in the air can be consumed in time, simultaneously the reaction releases heat and is conducted into the caulking ball through the heat-conducting carbon fiber bundle, the filling material in the pores of the inflatable inner ball is heated by the fixed point to force the filling material to be decomposed continuously to generate gas, the gas pressure in the pores is increased continuously until the outer caulking film layer is broken, the cracked caulking film layer is driven to be filled into the cracks together, the gaps are blocked while the air in the cracks is removed, and the metal material in the caulking film layer can react with the external air to generate a compact oxide film, prevent the air from spreading to the inside, thereby forming good antirust effect and prolonging the service life of the antirust paint.

(2) From caulking inserted ball including caulking ball and many perception pipes, and many perception pipe ring array distribute in the surface of caulking ball, and the perception pipe plays the cracked effect of perception coating, improves the compactness between the coating simultaneously, and when the caulking ball played improvement coating intensity, can trigger the caulking action to prevent the erosion of outside air to inside.

(3) The caulking joint ball comprises a reinforcing outer ball, a caulking joint film layer and an inflatable inner ball, the caulking joint film layer and the reinforcing outer ball are sequentially covered on the outer end of the inflatable inner ball, the sensing pipe comprises a polypropylene hollow fiber pipe and a brittle rupture coating film, a plurality of air holes matched with the polypropylene hollow fiber pipe are formed in the reinforcing outer ball, and polypropylene hollow fiber pipe is connected with the bleeder vent, the brittle fracture diolame parcel is in the one end that polypropylene hollow fiber pipe kept away from the bleeder vent, the reinforcement ectosphere has higher intensity and plays support and setting effect, the caulking rete is then used for aerifing inner ball outside evenly distributed with active metal powder, it is used for triggering the caulking action to aerify the inner ball, the brittle fracture diolame wraps up the protection to polypropylene hollow fiber pipe under normal condition, avoid external coating composition to enter into and cause the jam in the polypropylene hollow fiber pipe, and can fragment when receiving the impact and open polypropylene hollow fiber pipe.

(4) Inlay on the caulking rete and have a plurality of heat conduction carbon fiber bundles that extend to in the polypropylene hollow fiber pipe, heat conduction carbon fiber bundle keeps away from caulking rete one end parcel and has self-heating material package, and self-heating material package can carry out oxidation reaction with the air that the external world came in to produce certain heat and conduct to caulking rete department through heat conduction carbon fiber bundle, thereby fixed point is to inside aerifing the inner ball and is heated the accurate caulking action that triggers.

(5) The reinforcement ectosphere adopts silicon dioxide to make, the caulking rete adopts active metal powder to bond and forms, and active metal powder is zinc powder, arbitrary one or the combination in zinc alloy and the aluminite powder, it adopts porous ceramic material to make to aerify the ectosphere, and porous ceramic material's hole intussuseption is filled with the material that generates gas of thermal decomposition, the filling material in the porous ceramic material hole is after the heating, constantly decomposes and produces gas, the caulking rete until crowded the outside is broken along with the continuous increase of atmospheric pressure in the hole, and drive the caulking rete after cracked and fill to crack department together, block up the gap when driving away the interior air of crack.

Drawings

FIG. 1 is a schematic view showing a structure of a self-plugging ball-inserting structure in example 1 of the present invention;

FIG. 2 is a sectional view of a self-caulking embedded ball in example 1 of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural view of the inflatable inner ball of the present invention in an inflated state;

FIG. 5 is a schematic view showing the structure of a self-plugging ball-inserting device in example 2 of the present invention;

fig. 6 is a schematic structural view of a self-caulking embedded ball in embodiment 3 of the present invention.

The reference numbers in the figures illustrate:

the device comprises a joint sealing ball 1, a reinforcing outer ball 11, a joint sealing film layer 12, an inflatable inner ball 13, a sensing pipe 2, a polypropylene hollow fiber pipe 21, a brittle fracture coating 22, a heat-conducting carbon fiber bundle 3 and a self-heating material bag 4.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a self-plugging water-based antirust coating comprises the following raw materials in parts by weight: 30 parts of styrene-acrylic emulsion, 15 parts of inorganic filler, 10 parts of pigment, 3 parts of barium sulfate, 1 part of rare earth metal oxide, 0.5 part of defoaming agent, 0.2 part of dispersing agent, 2 parts of film-forming agent, 15 parts of deionized water and 16 parts of self-plugging embedded balls.

The inorganic filler is any one or a combination of mica powder, wollastonite powder, talcum powder, kaolin or bentonite.

The pigment is any one of iron oxide red, titanium dioxide, carbon black and alumina powder.

The rare earth metal oxide is any one or a combination of lanthanum oxide and cerium oxide.

The defoaming agent is tributyl phosphate or water-based silicone oil, the dispersing agent is polyisobutylene diacid salt, and the film forming agent is ethylene glycol ethyl ether or ethylene glycol butyl ether.

From caulking joint ball includes caulking joint ball 1 and many perception pipes 2, and many perception pipe 2 annular array distribute in the surface of caulking joint ball 1, and perception pipe 2 plays the cracked effect of perception coating, improves the compactness between the coating simultaneously, and when caulking joint ball 1 played improvement coating intensity, can trigger the caulking joint action to prevent the erosion of outside air to inside.

Referring to fig. 2, the caulking ball 1 includes a reinforcing outer ball 11, a caulking film layer 12 and an inflatable inner ball 13, the caulking film layer 12 and the reinforcing outer ball 11 sequentially cover the outer end of the inflatable inner ball 13, the sensing tube 2 includes a polypropylene hollow fiber tube 21 and a brittle rupture coating 22, the brittle rupture coating 22 is made of brittle material, the reinforcing outer ball 11 is provided with a plurality of air vents matching with the polypropylene hollow fiber tube 21, the polypropylene hollow fiber tube 21 is connected with the air vents, the brittle rupture coating 22 is coated on one end of the polypropylene hollow fiber tube 21 away from the air vents, the reinforcing outer ball 11 has higher strength to play a role in supporting and shaping, the caulking film layer 12 is used to uniformly distribute active metal powder outside the inflatable inner ball 13, the inflatable inner ball 13 is used to trigger the caulking action, the brittle rupture coating 22 coats and protects the polypropylene hollow fiber tube 21 in a normal state, prevent the external coating components from entering the polypropylene hollow fiber tube 21 to cause blockage and being cracked to open the polypropylene hollow fiber tube 21 when being impacted.

Referring to fig. 3-4, a plurality of heat-conducting carbon fiber bundles 3 extending into the polypropylene hollow fiber tube 21 are embedded in the caulking film layer 12, one end of the heat-conducting carbon fiber bundles 3, which is far away from the caulking film layer 12, is wrapped with a self-heating material pack 4, the self-heating material pack 4 can perform an oxidation reaction with air coming from the outside, and generate a certain amount of heat to be conducted to the caulking film layer 12 through the heat-conducting carbon fiber bundles 3, and then the inner inflatable inner ball 13 is heated at a fixed point, so that a caulking action is triggered accurately.

The reinforcing outer ball 11 is made of silicon dioxide, the caulking film layer 12 is formed by bonding active metal powder, the active metal powder is any one or combination of zinc powder, zinc alloy and aluminum powder, the inflatable inner ball 13 is made of porous ceramic material, and substances which are decomposed to generate gas when being heated are filled in pores of the porous ceramic material, such as ammonium bicarbonate, potassium permanganate and other solid substances, the filling substances in the pores of the porous ceramic material are continuously decomposed to generate gas after being heated, the pressure in the pores is continuously increased until the caulking film layer 12 on the outer side is broken, and the cracked caulking film layer 12 is driven to be filled into the crack together, so that the crack is blocked while air in the crack is removed.

s1, weighing inorganic filler, rare earth metal oxide and dispersant, adding into deionized water, uniformly stirring, mixing and dissolving for 5min, slowly adding pigment and barium sulfate during stirring, and uniformly stirring for 30 min;

s2, weighing styrene-acrylic emulsion, a defoaming agent and a self-plugging embedded ball, mixing the mixture with the solution in the step S1 in a vacuum environment or under the protection of nitrogen, and stirring for 3min at the rotating speed of 150 r/min;

Example 2:

referring to fig. 1, a self-plugging water-based antirust coating comprises the following raw materials in parts by weight: 35 parts of styrene-acrylic emulsion, 20 parts of inorganic filler, 12 parts of pigment, 4 parts of barium sulfate, 2 parts of rare earth metal oxide, 1 part of defoaming agent, 0.3 part of dispersing agent, 3 parts of film forming agent, 20 parts of deionized water and 20 parts of self-plugging embedded balls.

Referring to fig. 1, the self-plugging caulking ball comprises a plugging ball 1 and a plurality of sensing pipes 2, the sensing pipes 2 are distributed on the outer surface of the plugging ball 1 in an annular array mode, the sensing pipes 2 play a role in sensing cracks of a coating and improving tightness between coatings, and the plugging ball 1 plays a role in improving strength of the coatings and can trigger plugging actions so as to prevent external air from corroding the inside.

The caulking ball 1 is filled with the mixture of active metal powder and the gaseous substance that is decomposed with heat to through heat treatment, trigger the decomposition action of the gaseous substance that is decomposed with heat in advance when using, when perception pipe 2 perception crack and open, gaseous rushing out carries active metal powder and fills in the crack.

s1, weighing inorganic filler, rare earth metal oxide and dispersant, adding into deionized water, uniformly stirring, mixing and dissolving for 10min, slowly adding pigment and barium sulfate during stirring, and uniformly stirring for 45 min;

s2, weighing styrene-acrylic emulsion, a defoaming agent and a self-plugging embedded ball, mixing the mixture with the solution in the step S1 in a vacuum environment or under the protection of nitrogen, and stirring for 4min at the rotating speed of 200 r/min;

The remainder was in accordance with example 1.

Example 3:

referring to fig. 1, a self-plugging water-based antirust coating comprises the following raw materials in parts by weight: 40 parts of styrene-acrylic emulsion, 25 parts of inorganic filler, 14 parts of pigment, 5 parts of barium sulfate, 3 parts of rare earth metal oxide, 1.5 parts of defoaming agent, 0.4 part of dispersing agent, 4 parts of film forming agent, 25 parts of deionized water and 24 parts of self-plugging embedded balls.

Referring to fig. 1, the self-plugging ball can be made into a fibrous shape, and includes a polypropylene hollow fiber tube 21 and a pair of brittle rupture envelopes 22, the brittle rupture envelopes 22 are wrapped at two ends of the polypropylene hollow fiber tube 21, the polypropylene hollow fiber tube 21 is filled with a mixture of active metal powder and a gas substance decomposed by heat, and when the self-plugging ball is used, the mixture is heated to trigger the decomposition of the gas substance decomposed by heat in advance, and when the brittle rupture envelopes 22 sense and open a crack, gas rushes out and carries the active metal powder to fill the crack.

s1, weighing inorganic filler, rare earth metal oxide and dispersant, adding into deionized water, uniformly stirring, mixing and dissolving for 15min, slowly adding pigment and barium sulfate during stirring, and uniformly stirring for 60 min;

s2, weighing styrene-acrylic emulsion, a defoaming agent and a self-plugging embedded ball, mixing the mixture with the solution in the step S1 in a vacuum environment or under the protection of nitrogen, and stirring for 5min at the rotating speed of 250 r/min;

The remainder was in accordance with example 1.

The invention can not only improve the strength and weather resistance of the coating and is not easy to fall off on the metal surface by filling the self-plugging caulking ball in the water-based coating, but also can quickly react with the self-heating material bag 4 in the sensing tube 2 after the coating is sensed to have cracks, not only can timely consume oxygen in the air, but also can react to release heat and transmit the heat to the plugging ball 1 through the heat-conducting carbon fiber bundle 3, the filling material in the pores of the inflatable inner ball 13 is heated at a fixed point to force the filling material to be continuously decomposed to generate gas, the gas pressure in the pores is continuously increased until the plugging film layer 12 at the outer side is broken, and the cracked plugging film layer 12 is driven to fill the cracks together to plug the cracks while removing the air in the cracks, and the metal material in the plugging film layer 12 can react with the external air to generate an oxide film compactly, prevent the air from spreading to the inside, thereby forming good antirust effect and prolonging the service life of the antirust paint.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The self-plugging water-based antirust coating is characterized by comprising the following components in parts by weight: the material comprises the following raw materials in parts by weight: 30-40 parts of styrene-acrylic emulsion, 15-25 parts of inorganic filler, 10-14 parts of pigment, 3-5 parts of barium sulfate, 1-3 parts of rare earth metal oxide, 0.5-1.5 parts of defoaming agent, 0.2-0.4 part of dispersing agent, 2-4 parts of film forming agent, 15-25 parts of deionized water and 16-24 parts of self-plugging embedded ball.

2. The self-plugging water-based antirust coating according to claim 1, characterized in that: the inorganic filler is any one or a combination of mica powder, wollastonite powder, talcum powder, kaolin or bentonite.

3. The self-plugging water-based antirust coating according to claim 1, characterized in that: the pigment is any one of iron oxide red, titanium dioxide, carbon black and alumina powder.

4. The self-plugging water-based antirust coating according to claim 1, characterized in that: the rare earth metal oxide is any one or a combination of lanthanum oxide and cerium oxide.

5. The self-plugging water-based antirust coating according to claim 1, characterized in that: the defoaming agent is tributyl phosphate or water-based silicone oil, the dispersing agent is polyisobutylene diacid salt, and the film forming agent is ethylene glycol ethyl ether or ethylene glycol butyl ether.

6. The self-plugging water-based antirust coating according to claim 1, characterized in that: the self-plugging ball embedding device comprises a plugging ball (1) and a plurality of sensing pipes (2), wherein the sensing pipes (2) are distributed on the outer surface of the plugging ball (1) in an annular array mode.

7. The self-plugging water-based antirust coating according to claim 6, characterized in that: stifled seam ball (1) is including reinforcement ectosphere (11), stifled seam rete (12) and aerify interior ball (13), and stifled seam rete (12) and reinforcement ectosphere (11) cover in proper order in the outer end of aerifing interior ball (13), perception pipe (2) are including polypropylene hollow fiber pipe (21) and brittle rupture diolame (22), set up a plurality ofly on reinforcement ectosphere (11) and polypropylene hollow fiber pipe (21) assorted bleeder vent, and polypropylene hollow fiber pipe (21) are connected with the bleeder vent, brittle rupture diolame (22) parcel is in the one end that polypropylene hollow fiber pipe (21) kept away from the bleeder vent.

8. The self-plugging water-based antirust coating according to claim 7, characterized in that: inlay on caulking rete (12) and have a plurality of heat conduction carbon fiber bundles (3) that extend to in polypropylene hollow fiber pipe (21), caulking rete (12) one end parcel is kept away from in heat conduction carbon fiber bundles (3) has self-heating material package (4).

9. The self-plugging water-based antirust coating according to claim 7, characterized in that: the reinforcing outer ball (11) is made of silicon dioxide, the caulking film layer (12) is formed by bonding active metal powder, the active metal powder is any one or combination of zinc powder, zinc alloy and aluminum powder, the inflatable inner ball (13) is made of porous ceramic material, and substances which are decomposed to generate gas under the condition of heat are filled in pores of the porous ceramic material.

10. The method for preparing a self-caulking water-based antirust coating according to any one of claims 1 to 9, characterized in that: the method comprises the following steps: