JP4509873B2 - Method for producing zinc flakes containing different metals and method for producing self-sacrificial anticorrosive agent using the same - Google Patents

Description

  The present invention is used for producing a different metal-containing zinc flake obtained by mixing a different metal-containing and / or inorganic pigment into zinc flake, and for anticorrosive and anticorrosive treatment of iron-based metal surfaces such as steel and cast iron. The present invention relates to a method for producing a self-sacrificial metal anticorrosive agent produced using a dissimilar metal-containing zinc flake.

  Conventionally, the self-sacrificial rust and corrosion inhibitor is manufactured using different metal-containing zinc flakes containing other metals (hereinafter also referred to as “foreign metal”) with respect to zinc flakes. Examples of the different metal-containing zinc flakes mainly include aluminum-containing zinc flakes. The aluminum-containing zinc flakes are produced by adding molten aluminum to molten zinc, making aluminum-containing zinc particles by an atomizing method, and using the lubricant and bead mill to produce aluminum-containing zinc particles. This is a method for producing aluminum-containing zinc flakes by flaking in a solvent, drying, pulverizing and classifying.

However, in the above method for producing zinc flakes containing different metals, molten zinc and aluminum are mixed. However, since each melting point is different and zinc is mainly used, 1% of aluminum is contained with respect to zinc. It was very difficult to add more. Further, even when other metals other than aluminum are mixed in a molten state, it is very difficult to increase the amount of zinc added. Therefore, only a specific thing can be mixed in a zinc flake, and there existed a problem that the use of a different metal containing zinc flake was limited.
In addition, the self-sacrificial rust and corrosion inhibitor is required to be colored depending on the application. However, when coloring a self-sacrificial anticorrosive anticorrosive agent, it is necessary to further mix a pigment into the zinc flakes containing different metals. The anticorrosive action is reduced. Therefore, there is a problem that it is difficult to obtain a self-sacrificial rust and corrosion inhibitor with a desired hue.
The present invention has been made paying attention to such problems existing in the prior art. The object is to produce a dissimilar metal-containing zinc flake that exhibits a wide variety of performances and / or can be colored in a desired hue, and a method for producing a self-sacrificial rust and corrosion inhibitor using the same. It is to provide.

In order to achieve the above object, the invention for producing a dissimilar metal-containing zinc flake according to claim 1 is characterized in that zinc particles and other metal particles and / or inorganic pigment particles are organically mixed using a bead mill. The gist is that other metal particles and / or inorganic pigment particles are adhered to the surface of the flaked zinc particles while flaking the zinc particles by mixing and pulverizing with a solvent and a lubricant.
In the above configuration, zinc has adhesiveness although it is brittle compared to other metals. Therefore, when zinc particles, metal particles other than zinc particles such as aluminum and / or inorganic pigment particles, and an organic solvent and a lubricant are added to the bead mill, and mixing and grinding are repeated, Dissimilar metal particle pieces and / or inorganic pigment particle pieces are embedded therein and pulverized to produce dissimilar metal-containing zinc flakes containing dissimilar metals and / or inorganic pigments. Furthermore, when black pigments such as iron oxide, manganese oxide and nickel oxide are included in the zinc flakes as inorganic pigments, black dissimilar metal-containing zinc flakes having self-sacrificial anticorrosive action and electrical conductivity are produced. can do. As a result, the dissimilar metal-containing zinc flakes can exhibit various performances and / or can be colored to a desired hue. The mixing ratio of other metal particles and / or inorganic pigment particles can be easily adjusted by changing the ratio of zinc particles to other metal particles and / or inorganic pigment particles. Furthermore, by using tin, indium, gold, etc. as other metal particles, manufacture zinc flakes containing different metals, and then melt various zinc alloys containing different metals to easily and safely manufacture various zinc alloys. You can also do it.
An invention of a method for producing a dissimilar metal-containing zinc flake according to claim 2 is the invention according to claim 1, wherein the zinc particles are produced by an atomizing method or an evaporation method. The gist is that the diameter is 0.1 μm or more.
In the above configuration, various desired substances can be suitably mixed.
The invention of the method for producing zinc flakes containing different metals according to claim 3 is the invention according to claim 1 or 2, wherein the other metal particles are aluminum, magnesium, iron, antimony, iridium, calcium, It is summarized that it is at least one selected from gold, silver, silicon, cobalt, zirconium, tin, tungsten, carbon, tantalum, titanium, copper, nickel, platinum, vanadium, palladium, boron, manganese, and molybdenum. .
In the said structure, the various unique performance which each substance has can be provided to a dissimilar metal containing zinc flake.
The invention of the method for producing zinc flakes containing different metals according to claim 4 is the invention according to any one of claims 1 to 3, wherein the particle size of the other metal particles and / or inorganic pigment particles is: The gist is that it is 0.1 μm or more.
In the above configuration, other metal particles and / or inorganic pigment particles can be suitably mixed in the zinc particles.
Invention of the manufacturing method of the self-sacrificial rust preventive anticorrosive agent of Claim 5 is manufactured using the dissimilar-metal containing zinc flake as described in any one of Claims 1-4. And
In the above configuration, various desired substances can be mixed in the self-sacrificial rust and corrosion inhibitor, and various performances can be exhibited depending on the mixed substances.

  Various desired substances can be mixed, and various performances can be exhibited according to the mixed substances.

The present invention is described in detail below.
[About the bead mill to be used]
The bead mill used is a completely sealed, horizontal microbead mill, which is used for wet pulverization and dispersion. In the horizontal type, since the dispersion medium is hardly affected by gravity, it is possible to obtain a nearly uniform distribution in the cylinder. Further, it is possible to fill the dispersion medium with a high density of 80 to 85%. As the dispersion medium, glass beads, zircon beads, zirconia beads, steel balls, or the like can be used according to the viscosity, specific gravity and moisture frame of the processed material, and the required particle size of the dispersion. In the present invention, although the dispersion media used differ depending on the hardness of the treated metal and the hardness of the color pigment, in general, zircon beads or zirconia beads are used. Depending on the size of the desired flake, a dispersion medium with a sphere diameter of 0.1 mm to 3.0 mm can be used. Generally, a dispersion medium with a diameter of 0.1 mm to 1.5 mm is used. To do.

〔Organic solvent〕
The organic solvent used in the present invention is a non-aqueous organic solvent that is inexpensive, does not contain moisture, and has a boiling point of preferably 100 ° C. or higher, more preferably 150 ° C. or higher up to about 250 ° C. is there. Examples of such non-aqueous organic solvents include petroleum benzine, kerosene, light oil, kerosene, mineral spirit, mineral terpent and the like. The ratio of the organic solvent used in the present invention to the amount of the treated metal powder varies depending on the cylinder volume of the bead mill used, but is generally 1.2 to 5 L (liter) with respect to 1 kg of the treated metal powder. .

[Zinc powder]
The zinc powder used in the present invention has a total amount of impurities of 99% or more, a zinc content of 97% or more, lead as impurities is 0.1% or less, gadmium is 0.05% or less, Iron is 0.02% or less. Further, the average particle size of the zinc powder varies depending on the size of the desired different metal-containing zinc flakes, but when the average particle size D ₅₀ of the different metal-containing zinc flakes desired in the present invention is 10 μm, it is used during processing. The average particle size of the zinc particles is 2 to 10 μm, and the maximum particle size of the zinc particles contained therein is preferably 40 μm or less. If flaking of D ₅₀ : 10 μm is desired in the minimum processing time, the average particle size of the processed powder is 5 μm or less, and the maximum particle size of zinc particles contained therein is most preferably 15 μm or less.

〔aluminum〕
The aluminum powder used in the present invention contains 98% or more of active aluminum, impurities are 0.015% or less of copper, iron is 0.2% or less, silicon is 0.2% or less, and moisture is 0.1%. % Or more. The average particle size of the aluminum powder is 4.0 ± 1.5 μm to 45 ± 5 μm. When aluminum-containing dissimilar metal-containing zinc flakes are produced using aluminum powder having a large average particle diameter, very beautiful aluminum-colored (white silver) dissimilar metal-containing zinc flakes can be obtained. Since the particle size becomes large, when the dissimilar metal-containing zinc flakes having an average particle size D _{50 of} 10 μm are obtained by pulverization and classification, the whole becomes a slightly white mouse color (white gray). Accordingly, in order to obtain aluminum-colored foreign metal-containing zinc flakes, the particle diameter of the treated aluminum powder is preferably 6 μm or less. Moreover, as the ratio of aluminum to zinc increases, the aluminum color becomes darker.

[Inorganic pigment particles]
In the present invention, an inorganic pigment is used when producing colored dissimilar metal-containing zinc flakes. Examples of the inorganic pigment include simple substances or mixtures of metals, metal oxides, metal sulfides, and the like.
Examples of the inorganic pigment in the case where the different metal-containing zinc flakes are white tone include zinc white, aluminum, white carbon (silica), lithopone, zinc sulfide, titanium oxide, and antimony oxide. In particular, if aluminum and titanium oxide are mixed at a ratio of 1 to 40% by weight with respect to the zinc powder, the hue of the dissimilar metal-containing zinc flakes changes from gray to aluminum, especially aluminum color (white) Can be obtained by mixing 10 to 20% by weight with respect to the zinc powder. When titanium oxide is used as an inorganic pigment, the hue of the dissimilar metal-containing zinc flakes is dull white. The mixing ratio of titanium oxide is 10 to 25% by weight with respect to the zinc particles.
Examples of the inorganic pigment when the different metal-containing zinc flakes have a black tone include carbon black, graphite, triiron tetroxide, a mixture of triiron tetroxide and manganese oxide, and the like. In particular, when triiron tetroxide or a mixture of triiron tetroxide and manganese oxide is used, the dissimilar metal-containing zinc flakes have a beautiful black color. The addition amount of triiron tetroxide, a mixture of triiron tetroxide and manganese oxide is 10 to 40% by weight with respect to the zinc particles, and a good ratio of rust prevention power is 10 to 30% by weight.
Examples of the inorganic pigment in the case where the different metal-containing zinc flakes are yellowish include yellow iron oxide, ocher, and titanium yellow. In particular, when titanium yellow (titanium yellow) is used, dissimilar metal-containing zinc flakes with good heat resistance can be obtained. The amount of titanium yellow added is 10 to 40% by weight based on the zinc particles.
Examples of the inorganic pigment in the case where the different metal-containing zinc flakes are browned include iron oxide (Fe ₂ O ₃ + FeO) and amber (Fe ₂ O ₃ + MnO ₂ + Mn ₃ O ₄ ). Iron oxide is particularly good, and the amount added is 8 to 30% by mass with respect to the zinc particles.
Examples of inorganic pigments in which different metal-containing zinc flakes are reddish include Bengala (ferric trioxide) and antimony red (2Sb ₂ O ₃ · Sb ₂ O ₃ or Sb ₂ S ₂ · Sb ₂ O ₃ ). It is done. In particular, in the case of Bengala, the redness becomes stronger as the particle size of the dissimilar metal-containing zinc flakes becomes larger, and the amount added is 39% by weight or more of 12 to 35% by weight, and the larger the particle size, the closer to Bengala color. Dissimilar metal-containing zinc flakes are obtained.
Examples of inorganic pigments in the case where the dissimilar metal-containing zinc flakes have a blue tone or green tone include ultramarine blue, bitumen, cobalt blue, cerulean blue, Wusu, cobalt green, zinc green, and the like. In addition, when these inorganic pigments are used, they are generally dark blue and green.
Further, when copper powder is used as the inorganic pigment, different metal-containing zinc flakes close to golden to yellow can be obtained depending on the blending ratio with zinc particles. When tin powder is used as the inorganic pigment, a dissimilar metal-containing zinc flake close to yellow can be obtained. In both cases of copper powder and tin powder, it is preferable to set the content in the range of 10 to 40% by weight with respect to zinc particles as anticorrosive and anticorrosive.

[Lubricants and antioxidants]
In the present invention, different lubricants and antioxidants (antioxidants) are used depending on the purpose of use of the different metal-containing zinc flakes. Further, as a lubricant and an antioxidant, it has water resistance, has lubricity to make the granular powder flakes, and covers the flake surface to prevent oxidation, etc. A compound having the property of scattering from the surface of the flakes is desirable. Specifically, examples of the antioxidant or lubricant having water resistance include higher fatty acids and higher fatty alcohols. The addition amount of the antioxidant and the lubricant is preferably 0.1 to 30% by weight, more preferably 0.5 to 10% by weight, based on the total weight of the metal powder to be treated.
Further, depending on the purpose of use, the surface of the dissimilar metal-containing zinc flakes may be resin-coated or specially processed with a coupling agent or the like. When the surface of zinc flakes containing different metals is resin-coated or specially treated with a coupling agent, etc., the lubricants and antioxidants attached to the surfaces of different metal-containing zinc flakes treated with lubricants and antioxidants are mineralized. Wash and remove with spirit and other organic solvents, and perform resin coating and coupling. In the case of resin coating treatment, the washed dissimilar metal-containing zinc flakes are dispersed in an organic solvent, a resin monomer and a polymerization initiator are added little by little, and the resin coating is performed while stirring. The amount of the resin monomer used is preferably 0.5 to 20% by weight, more preferably 1 to 5% by weight, based on the treated metal. Then, by removing the organic solvent and drying, the resin-coated zinc flakes containing different metals are obtained.
In the case of treatment with a coupling agent, for example, the lubricant and the antioxidant are washed away with an alcohol-based organic solvent such as propyl alcohol, butyl alcohol, butyl cellosolve, etc., and the dissimilar metal-containing zinc flakes are dispersed in the alcohol-based organic solvent. Then, the alkoxy group of the coupling agent is converted into a hydroxy group and dissolved in the alcohol. The stirring agent is added at 60 to 80 ° C. with stirring, and stirred for 1 to 2 hours on the surface of the zinc flakes containing different metals. The coupling agent is reacted, the alcohol is removed and dried to obtain a flaky powder. The amount of the coupling agent to be used is preferably 0.5 to 10% by weight, more preferably 1 to 5% by weight, based on the treated metal.

[Manufacture of zinc flakes containing different metals]
The process described in each Example shown below was performed to produce a dissimilar metal-containing zinc flake made of zinc flakes containing a dissimilar metal or inorganic pigment.

The material described in the [Material] column of Table 1 is put in a 1.4 L bead mill, and in mineral spirit, the liquid flow rate is 10 L / min, the peripheral speed of the blade in the cylinder is 110 m / min, the liquid temperature is 20-30 ° C., Processing was performed with a pulverization and mixing time of 7 hours. Thereafter, the pulverized mixed liquid was evaporated to obtain different metal-containing zinc flakes containing different metals. The dissimilar metal-containing zinc flakes were pulverized and classified, and the dissimilar metal-containing zinc flakes were classified so as to have a D _{50 of} 10 μm as a raw material for an aqueous non-polluting metal rust and corrosion inhibitor. In addition, when using it as the raw material of a metal rust prevention corrosion inhibitor, the silane coupling agent was used as an adhesive agent. Example 1 is shown in Experiment 1 to Experiment 3 in Table 1.

  The material described in the [Material] column of Table 1 is put into a 1.4 L volume bead mill, and the liquid flow rate is 10 l / min, the peripheral speed of the blade in the cylinder is 110 m / min, the liquid temperature is 21 to 23 ° C., in the mineral spirit. Milling and mixing time was 6 hours. Thereafter, the pulverized mixed solution was evaporated to obtain dissimilar metal-containing zinc flakes containing an inorganic pigment by pulverization and classification. Then, by using the silane coupling agent as an adhesive, the different metal-containing zinc flakes are used as a sample of an aqueous non-polluting metal rust and corrosion inhibitor. Example 2 was shown in Experiment 4 and Experiment 5 in Table 1.

[Metal powder]
The metal powder used in the present invention is the dissimilar metal-containing zinc flakes described herein. Further, when the metal rust and corrosion inhibitor is made of aluminum, an aluminum paste is added. In this case, the amount of aluminum paste added is preferably 1 to 10% by weight, more preferably 1 to 4% by weight. When the metal anticorrosive and anticorrosive agent is not aluminum, the dissimilar metal-containing zinc flakes are used as they are. At this time, the usage-amount of a different metal containing zinc flake becomes like this. Preferably it is 10 to 45 weight%, More preferably, it is 15 to 35 weight%.

〔adhesive〕
The adhesive used in the present invention is a silane coupling agent. Examples of the silane coupling agent include 2- (3,4-epoxycyclohexyl), ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and 3-glycidoxy. Examples thereof include propyltriethoxysilane. From the viewpoint of the stability of the treatment liquid and the adhesive strength, 3-glycidoxypropyltrimethoxysilane is most preferable. The addition amount is preferably 2 to 20% by weight, more preferably 2.5 to 10% by weight.

[Surfactant]
In the metal corrosion inhibitor of the present invention, a surfactant is added to disperse the metal powder in water. Examples of surfactants include alkyl ether type nonionic activities such as polyoxyethylene butyl ether, polyoxyethylene octyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, etc. Agents, alkyl ester type nonionic active agents such as polyoxyethylene laurate, polyoxyethylene oleate, polyoxyethylene stearate, etc., ethylene oxyside / propylene oxycide / block copolymer type such as polypropylene glycol and polyethylene glycol ether Nonionic active agents and the like can be mentioned. As the surfactant, those which do not contain aromatics which may cause environmental hormone contamination in the molecule are desirable. L. B. A nonionic surfactant having (Hydophile-Lipophile Balance) of 7 or more and 18 or less is preferable as the surfactant of the present invention. Further preferred surfactant H.I. L. B. Is in the range of 11-14. The amount of the surfactant added is preferably 0.05 to 8% by weight, more preferably 0.1 to 5% by weight.

[Aqueous solvent]
In the metal anticorrosive treatment liquid of the present invention, a water-soluble organic solvent may be added as a solvent in order to improve the dispersion of the metal powder in the treatment liquid in synergy with the rust inhibitor and the surfactant. desirable. Examples of the water-soluble organic solvent include 1-propanol, 2-propanol, primary butanol, secondary butanol, tertiary butanol, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, methyl cellosolve, ethyl cellosolve, butyl cellosolve, Examples thereof include methyl carbitol, ethyl carbitol, butyl carbitol, diacetone alcohol, 1,5-pentanediol and the like. More preferable water-soluble organic solvents include glycerin, ethylene glycol, diethylene glycol, propylene glycol, and dipropylene glycol. The amount of the water-soluble organic solvent added is preferably 3 to 50% by weight, more preferably 10 to 45% by weight. %.

[Thickener]
In the metal anticorrosive anticorrosive agent of the present invention, it is preferable to add a thickener in order to ensure the thickness of the coating layer on the surface of the metal to be treated of the treatment liquid. Examples of the thickener used in the present invention include water-soluble thickeners such as methyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, ethyl cellulose, carboxyethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, starch, carrageenan, and pectin. . More preferred thickeners are carboxymethyl cellulose, hydroxymethyl cellulose, and hydroxyethyl cellulose. The addition amount of the thickener is preferably 0.05 to 5% by weight, more preferably 0.1 to 2% by weight.

[Adjusted water]
Distilled water or deionized exchange water is used to prepare the treatment solution for the metal anticorrosive and anticorrosive agent of the present invention, but boiling water may be used.

〔Processing method〕
In the metal anticorrosive and anticorrosive agent of the present invention, a metal powder, a surfactant, a water-soluble organic solvent, water, and a thickener are blended in use, and the metal powder is dispersed by thoroughly mixing and stirring to prepare a treatment liquid. However, the viscosity of the processing solution is usually adjusted between 40 ± 5 seconds with Iwata Ford Cup # 4. In order to treat the surface of the metal to be treated with the treatment liquid, the metal surface is first polished by shot blasting, sand blasting, etc., and further washed with an organic solvent such as n-hexane, xylene, methyl ethyl ketone, acetone or the like if desired. After drying, the treatment liquid is applied to the metal surface by dipping, spraying, curtain flow coater, rotating brush coater, electrostatic coating or the like. After application of the treatment solution, it is allowed to stand at room temperature, dried by sending air if necessary, and preheated and dried at 150 to 160 ° C. for at least 10 minutes, followed by heat treatment at 230 to 240 ° C. for at least 10 minutes. By the heat treatment, a self-sacrificing metal rust and corrosion preventive coating of the metal rust and corrosion preventive of the present invention is formed on the metal surface. If desired, this metal anticorrosive and anticorrosive coating may be further coated with an overcoat agent.
The following materials are thoroughly mixed with stirring.

[Example 1 ']
Zinc powder ^{* 1)} 28.0 parts by weight Aluminum paste ^{* 2)} 3.0 〃
Ethylene glycol 28.5〃
Polyoxyethylene octyl alcohol ether ^{* 3)} 0.5 〃
Silane coupling agent ^{* 4)} 5.0 〃
Ion exchange water 35.0 〃
Hydroxyethyl cellulose 0.2 〃
* 1) The zinc powder is the one described in Experiment 3 of the present invention.
* 2) A 65% Alminium paste (thickness: 0.5 μm, diameter: 10.0 μm) was used.
* 3) Polyoxyethylene octyl alcohol ether L. B. 12.7 was used.
* 4) As the silane coupling agent, 3-glycidoxypropyltrimethoxysilane was used.
The liquid of Example 1 ′ is filtered through a 200-mesh sieve to obtain a treatment liquid A. The viscosity of the treatment liquid A was 41 seconds with Iwata Ford Cup # 4.

[Example 2 ']
Zinc powder ^{* 5)} 30.0 parts by weight Propylene glycol 25.0 〃
Polyoxyethylene octyl alcohol ether ^{* 3)} 0.1 〃
Silane coupling agent ^{* 4)} 5.0 〃
Ion-exchanged water 39.9〃
Hydroxyethyl cellulose 0.26〃
* 5) Zinc powder is described in Experiment 4 of the present invention, and is zinc trioxide containing zinc flakes colored with iron trioxide.
The liquid of Example 2 ′ is filtered through a 200-mesh sieve to obtain a treatment liquid B. The viscosity of the treatment liquid B was 35 seconds with Iwata Ford Cup # 4.

〔test〕
1. Sample (1) Steel plate: SS-41 steel plate (150 × 70 × 2.3 mm) was used. The steel sheet was washed with n-hexane, dried, polished on the surface by shot blasting, then washed with n-hexane → ether and dried.
(2) Screw: A plus screw having a length of 75 mm, a diameter of 2 mm, a head of 8 mm, and a screw part of 50 mm was used. The screw was washed with n-hexane, and after drying, the surface was polished by shot blasting, and then washed with n-hexane and dried.
2. Application and heat treatment (1) Steel plate: The above-mentioned treatment liquids A and B are applied to the steel plate so that the film thickness becomes 8 to 10 μm after heat treatment, air-dried for 1 minute, put in a dryer at 150 ° C. and preheated and dried for 10 minutes. Then, heat treatment was performed at 240 ° C. for 10 minutes.
(2) Screw: The above screw is immersed in each of the above-mentioned treatment liquids A and B, pulled up, and then forward rotated for 5 seconds with a dehydrator (cage diameter 200 mm, depth 200 mm, rotation speed 330 times / minute). Then, dehydration was performed in reverse rotation for 5 seconds, air-dried for 1 minute, preheated and dried at 150 ° C. for 10 minutes, and then heat-treated at 240 ° C. for 10 minutes.

〔Test results〕
1. Appearance of the coating film on the steel sheet The appearance of the coating film was visually observed. The results are as follows.
(1) Treatment sample with treatment liquid A: A silvery white beautiful smooth surface coating.
(2) Treatment sample with treatment liquid B: A smooth surface coating with black matte.
2. Adhesiveness of coating film (1) Test method Steel plate: A gobang test was performed on the steel plates treated with the treatment liquids A and B.
Screw: The head of the “screw” treated with the treatment liquids A and B is rubbed strongly three times with the fingertips of the hand. Check for any deposits on the fingertip.
(2) Test results Table 2 shows the results of the above tests.

  When Table 2 was seen, the adhesiveness of the metal anticorrosion film in the steel plate processed with the said processing liquids A and B and "screw" was excellent.

3. Salt Spray Test A salt spray test was performed on the rust-proof steel plate and “screw” according to JIS-Z-23717. Table 3 shows the results of the steel sheet, and Table 4 shows the results of “screw”. In addition, the steel plate cut | disconnected the cloth. One set of 5 screws is used.

  According to Tables 3 and 4, the samples treated with the treatment liquids A and B using the metal anticorrosive agent of the present invention exhibit practical anticorrosion properties, and are sufficiently superior to conventional galvanized products. It was shown that the sacrificial anticorrosive property was exhibited. Note that both of the treatment liquids A and B can be used as a water-based paint.

4). Electrical Resistance Test (1) Test Method A coating film of about 20 μm was formed by applying the treatment liquids A and B on the steel plate. And the electrical resistance value of this coating film was measured as a tester needle 300g pressure using the tester (KITHI Tester 3021) made from HIOKI.
(2) Test result The electrical resistance value of the coating film by the treatment liquid A was 1 to 2 Ω / cm. The electrical resistance value of the coating film with the treatment liquid A was 5 to 6 Ω / cm. From this result, it was shown that the metal anticorrosive agent of this invention has favorable electroconductivity.

No harmful substances are contained in any of the metal anticorrosive agent of the present invention and the coating film after treatment with the treatment solution of the metal anticorrosive agent, and components that generate harmful components or harmful components even after disposal are Not included, the metal anticorrosion treatment method using the metal anticorrosive agent of the present invention is a resource-saving and energy-saving treatment method friendly to the global environment, and compared with electrogalvanizing, hot dip galvanizing, impact galvanizing, etc. It is an excellent self-sacrificial rust and corrosion inhibitor. In addition, if colored dissimilar metal-containing zinc flakes are used, a colored self-sacrificial rust and corrosion inhibitor can be produced without using a pigment when producing a self-sacrificial rust and corrosion inhibitor, At present, there is no pigment having an anticorrosive and anticorrosive action, and this can be the greatest feature of the present invention.

Claims (4)

Zinc particles and no opportunity pigment particles, and mixed using a bead mill organic solvent, together with a lubricant, by grinding, while the zinc particles flaked, no machine pigment particles to the surface of the flaked zinc particles A process for producing zinc flakes containing dissimilar metals, wherein   The method for producing zinc flakes containing different metals according to claim 1, wherein the zinc particles are produced by an atomizing method or an evaporation method, and the particle size of the zinc particles is 0.1 μm or more. The method for producing zinc flakes containing different metals according to any one of claims 1 to 2, wherein the particle size of the inorganic pigment particles is 0.1 µm or more. It manufactures using the dissimilar-metal containing zinc flake as described in any one of Claims 1-3 , The manufacturing method of the self-sacrificial type rust prevention corrosion inhibitor characterized by the above-mentioned.