CN112409873A - Water-based anti-corrosion rust-conversion coating and preparation method and application thereof - Google Patents
Water-based anti-corrosion rust-conversion coating and preparation method and application thereof Download PDFInfo
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- CN112409873A CN112409873A CN202011472702.1A CN202011472702A CN112409873A CN 112409873 A CN112409873 A CN 112409873A CN 202011472702 A CN202011472702 A CN 202011472702A CN 112409873 A CN112409873 A CN 112409873A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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Abstract
The invention discloses a preparation method of a water-based anti-corrosion rust conversion coating, which comprises the following raw material components in parts by weight: 40-50 parts of water-based anti-corrosion rust-converting emulsion, 0.1-0.3 part of defoaming agent, 0.5-1 part of dispersing agent, 0.1-0.5 part of anti-flash rust agent, 0.2-1 part of thickening agent, 0.1-0.5 part of pH regulator, 0.1-1 part of wetting agent, 20-30 parts of pigment and filler, 2-5 parts of film-forming assistant and 10-20 parts of deionized water. The water-based anti-corrosion rust-conversion coating provided by the invention is quick to dry, excellent in initial water resistance, acid and alkali resistance and excellent in salt spray resistance, can be directly coated on rusted metal surfaces without strict derusting and surface treatment, is very suitable for various steel members with difficult thorough surface treatment, and has wide application prospect and development potential.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based anti-corrosion rust conversion coating and a preparation method thereof.
Background
The water-based anticorrosive rust-converting paint is also called as paint on a rust surface, and is a paint which does not directly use a rust-removing type paint, in other words, the water-based anticorrosive rust-converting paint is a novel paint which can be directly coated on the surface of a metal base material with residual rust, is mostly used as a primer for protecting the metal, is coated on the surface of the metal base material with the residual rust, and does not need to completely remove rust on the rusted metal, so that the water-based anticorrosive rust-converting paint has the advantages of reducing the cost of pretreatment of painting, lightening the labor intensity, protecting the environment, protecting the physical and mental health of human beings and the like, and the conversion-type. The conversion coating contains a component which is a rust conversion agent and can react with the rust to generate five-membered chelate or six-membered chelate or complex with stable structure or property, and the five-membered chelate or six-membered chelate or complex is adhered to the surface of the metal substrate to stabilize and convert the rust, thereby achieving the effects of rust conversion and metal protection. The traditional rust conversion agent is generally widely applied to rust conversion systems such as phosphoric acid-tannic acid, phosphoric acid-organic acid/inorganic acid and the like, but the rust conversion agent has a plurality of problems, for example, the rust conversion effect is easily influenced by various factors, such as the variety change, the concentration, the types and the concentration of phosphoric acid or other acids, and the like of tannic acid, and also has a great influence relation with the corrosion condition (such as the corrosion) of the surface of a metal substrate, and the like, such as the large molecular weight, the complex structure and the poor concentration control of tannic acid; phosphoric acid is medium strong acid, has strong acidity, and is easy to generate residues after conversion, so that the interior of the metal base material is continuously corroded, and the long-term corrosion resistance of the coating is influenced; the corrosion resistance of the metal base material is influenced by multiple factors, and the problems of uneven surface, different thickness, no measurable specific standard and the like exist in the aspect of single corrosion.
Disclosure of Invention
Based on the analysis, the invention provides the water-based anti-corrosion rust conversion coating and the preparation method thereof, aiming at the problems that the water-based anti-corrosion rust conversion coating in the prior art is poor in initial water resistance, poor in adhesive force and leveling property and not required in paint film thickness from the viewpoints of high energy, high efficiency and environmental protection.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the water-based anti-corrosion rust conversion coating comprises the following components in parts by weight: 40-50 parts of water-based anti-corrosion rust-converting emulsion, 0.1-0.3 part of defoaming agent, 0.5-1 part of dispersing agent, 0.1-0.5 part of anti-flash rust agent, 0.2-1 part of thickening agent, 0.1-0.5 part of pH regulator, 0.1-1 part of wetting agent, 20-30 parts of pigment and filler, 2-5 parts of film-forming assistant and 10-20 parts of deionized water.
Compared with the prior art, the water-based anti-corrosion rust conversion coating provided by the invention has the advantages that the rust conversion agent reacts with active harmful substances in the rust layer by virtue of the reactive group of the water-based modified resin to generate a stable inhibiting compound, so that the whole rust layer becomes a stable and protective filler in the coating, and the whole rust layer has better anti-corrosion property, durability and mechanical property by virtue of proper proportion of various anti-corrosion components and matching of pigments and fillers in the coating. The paint provided by the invention has comprehensive effects among the components, obviously improves the initial water resistance, hardness, adhesive force and corrosion resistance of the paint, also has the advantages of low VOC content, high drying speed, convenient construction and the like, can be directly coated on the corroded metal surface without strict rust removal and surface treatment, is very suitable for large steel members which are difficult to completely treat the surface, and has higher practical value and wide market prospect.
Preferably, the water-based anti-corrosion rust conversion coating comprises the following components in parts by weight: 45-50 parts of water-based anti-corrosion rust-converting emulsion, 0.1-0.3 part of defoaming agent, 0.5-1 part of dispersing agent, 0.1-0.5 part of anti-flash rust agent, 0.2-1 part of thickening agent, 0.1-0.5 part of pH regulator, 0.1-1 part of wetting agent, 25-30 parts of pigment and filler, 4-5 parts of film-forming assistant and 15-20 parts of deionized water.
More preferably, the water-based anti-corrosion rust conversion coating comprises the following components in parts by weight: 50 parts of water-based anti-corrosion rust-converting emulsion, 0.2 part of defoaming agent, 0.6 part of dispersing agent, 0.2 part of anti-flash rust agent, 0.4 part of thickening agent, 0.3 part of pH regulator, 0.5 part of wetting agent, 30 parts of pigment and filler, 4 parts of film-forming assistant and 20 parts of deionized water.
Preferably, the water-based anti-corrosion rust conversion emulsion is a polyphenol hydroxyl compound, can perform complexing action with iron ions in rust, and can react with small molecular substances by utilizing the principle that phenolic hydroxyl groups in the water-based anti-corrosion rust conversion emulsion can be coordinated with the iron ions to generate a stable complex, so that the novel rust conversion agent is obtained.
Based on the analysis, the invention uses the polyphenol compound to replace the traditional rust conversion system from the aspects of high energy, high efficiency and environmental protection, and overcomes the problems of unobvious anticorrosion effect, over-corrosion, uneven coating film or poor adhesion and the like generated on the metal base material in the past. The rust conversion substrate selected in the experimental preparation is gallic acid which is a polyphenol hydroxyl compound and can generate complexation with iron ions in rust, and the novel rust conversion agent is obtained by utilizing the principle that phenolic hydroxyl in the gallic acid can be coordinated with the iron ions to generate a stable complex and enabling the complex to react with small molecular substances. The invention selects and uses a pre-emulsification-semi-continuous seed emulsion polymerization method, and functional monomers participating in emulsion polymerization comprise: the prepared functional phosphate ester monomer, methyl methacrylate, butyl acrylate, methacrylic acid and other acrylic monomers are copolymerized with a rust converting agent in an emulsion polymerization manner to prepare the water-based anti-corrosion rust converting emulsion, so that the anti-corrosion performance of the emulsion is upgraded.
Preferably, the defoamer is a polyether siloxane copolymer.
The polysiloxane defoamer has the advantages of rapid defoaming, long foam inhibition time, safety and no toxicity, but is insoluble in water, resistant to high temperature and poor in acid and alkali resistance; the polyether defoamer has good water solubility, high temperature resistance and strong acid-base alkali resistance, but has undesirable defoaming speed and foam inhibition time. The polyether siloxane copolymer has the advantages of two defoaming agents of ethers and organic silicon, has good stability, low toxicity, oxidation resistance and high defoaming performance, can effectively remove micro bubbles in the coating, enables the coating to be combined with a substrate more tightly, seals the substrate material more effectively, and prevents substances such as water, oxygen and the like from contacting the substrate through the bubbles to cause corrosion.
Preferably, the dispersant is an aqueous solution of a polymer containing a surfactant and a pigment affinity group. Such as Tego760W with digao, which does not contain solvent and ethoxynonylphenol, has no touch property, has high compatibility with pigment, can effectively reduce particle flocculation under the condition of small dosage, enables fine pigment particles to be suspended in a medium, maintains the dispersed state in the subsequent production process, improves the stability and water retention of a dispersion system, can also obviously reduce grinding viscosity, can repair some fine cracks on the surface of a base material by matching with a pigment and filler, improves the flatness of a paint film, and enhances the corrosion resistance of the paint film.
Preferably, the flash rust inhibitor is a nitrite aqueous solution, and L8AF and L8NF of Aishi of Germany are selected, so that the flash rust problem of the water-based paint at the position of a welding seam and on iron materials such as cast iron and sand blasting iron and the problem of rust return when the water-based paint film is dry in a short time when the water-based paint film is wet can be effectively solved.
Preferably, the thickener is a polyurethane-type thickener.
More preferably, the thickener is a mixture of RM-8W and RM-12W from Rohm and Haas; RM-8W type thickener of roman hass is a low odor, solvent-free aqueous ionic associative rheology modifier (hydrophobically modified polyurethane) that provides excellent flow and leveling, uniform film forming properties, gloss development and high thickening efficiency; the RM-12W type thickener is a nonionic special polyurethane thickener which utilizes a special network structure among polyurethane, resin molecules and pigment particles to improve the stable viscosity performance, and has the advantages of no influence of pH, easy construction, good splash resistance, good leveling property and good glossiness; the ideal balance of high and low shear viscosity can be achieved by the synergy of two thickening agents RM-8W and RM-12W.
Preferably, the pH regulator is triethylamine.
The triethylamine is an efficient amine neutralizer, the pH value of a system is effectively adjusted, the volatilization is fast, and the initial water resistance is effectively improved.
Preferably, the wetting agent is a polyether siloxane copolymer.
The polyether siloxane copolymer has the advantages of ethers and organic silicon substances, has excellent substrate wettability, excellent flow promotion property and high compatibility, and has the advantages of improving scratch resistance and preventing shrinkage cavity and pigment flooding. The leveling agent and the wetting agent selected in the invention have synergistic effect, so that the coating has excellent substrate wettability, the binding force between the coating and a substrate is improved, and the penetration of substances which can cause corrosion phenomena such as water, oxygen and the like is prevented.
Preferably, the pigment and filler is a mixture of titanium white, carbon black and barium sulfate.
More preferably, the pigment filler is 10-15 parts of titanium white, the carbon black is 0.1-0.5 part, and the balance is barium sulfate.
The barium sulfate has good compatibility with a matrix, is tightly combined, has good wettability and excellent acid resistance, high temperature resistance and corrosion resistance, and can obviously improve the hardness and the wear resistance of the coating.
Preferably, the environment-friendly film forming assistant is ethylene glycol tertiary butyl ether.
The preferable cosolvent has the characteristics of small volatilization amount, strong dissolving power, no toxicity and low odor, and can improve leveling and adjust the drying speed of a paint film.
The water-based anti-corrosion rust conversion coating is characterized in that the water-based anti-corrosion rust conversion emulsion is a polyphenol hydroxyl compound, can generate a complexing action with iron ions in rust, and can react with small molecular substances by utilizing the principle that the phenolic hydroxyl group in the water-based anti-corrosion rust conversion coating can be coordinated with the iron ions to generate a stable complex, so that a novel rust conversion body is obtained.
The invention also provides a preparation method of the water-based anti-corrosion rust conversion coating, which at least comprises the following steps:
step a, weighing all components according to the design proportion of the water-based anti-corrosion rust-converting coating, uniformly stirring the weighed water-based anti-corrosion rust-converting emulsion, a pH regulator, a film-forming auxiliary agent and deionized water, adding the rest deionized water, a defoaming agent, a dispersing agent, a wetting agent and a pigment filler, and uniformly stirring and mixing to obtain a first slurry;
b, grinding the first slurry to the fineness of less than or equal to 30 microns, and filtering to obtain a second slurry;
and c, adding the rest defoaming agent and the anti-flash rust agent into the second slurry, stirring and mixing uniformly, adding the thickening agent, and adjusting the stormer viscosity to 25 ℃ to 75-85KU to obtain the water-based anti-corrosion rust-converting coating.
The preparation method is simple to operate, free of complex procedures and special equipment, low in cost and suitable for industrial large-scale production, and the prepared water-based anti-corrosion rust-conversion coating is suitable for various steel members which are difficult to be subjected to thorough surface treatment and has wide market prospects.
The invention mainly solves the problems that the existing water-based rusty coating is limited in surface rust conversion and is easy to rust again, the construction effect and stability are mainly considered, and the main difficulty lies in the thoroughness and depth of the water-based rust conversion technology and the difficulty in rust returning again.
The invention further discloses a water-based anti-corrosion rust-conversion coatingIs used for directly coating rusted metal surfaceThe experimental result shows that: compared with the common water-based rusty coating product, the coating is easy to construct, excellent in one-time film forming, thorough in rust conversion and stable.
The results show that: excellent resistance, excellent rusty coating effect and excellent corrosion resistance.
Compared with the prior art, the water-based anti-corrosion rust conversion coating and the preparation method and application thereof disclosed by the invention have the positive effects that:
(1) thorough deep rust removal and excellent corrosion prevention
(2) Excellent one-time film forming and easy coating
(3) The physical properties and resistance are excellent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The raw materials used in the present invention are all commercially available.
Example 1
The embodiment of the invention provides a water-based anti-corrosion rust conversion coating, which comprises the following components in parts by weight:
45 parts of water-based anti-corrosion rust-converting emulsion, 0.1 part of defoaming agent, 0.5 part of dispersing agent, 0.5 part of anti-flash rust agent, 0.4 part of thickening agent, 0.3 part of pH regulator, 0.2 part of wetting agent, 25 parts of pigment and filler, 4 parts of film-forming assistant and 20 parts of deionized water.
The water-based anti-corrosion rust-converting emulsion is a modified acrylic emulsion prepared by a laboratory; the antifoaming agent is TEGO 810; the dispersant is TEGO760W with digao; the flash rust inhibitor is L8AF and L8NF of Aishi in Germany; the thickening agent is a mixture of RM-8W and RM-12W of Rohm and Haas, wherein the mass ratio of RM-8W to RM-12W is 1: 1; triethylamine was basf, germany; wetting agent TEGO 4100; the titanium dioxide is 6618 titanium dioxide; the carbon black is Hongkong black; barium sulfate is 1250-mesh barium sulfate of Chuangyu; ethylene glycol tertiary butyl ether is basf dow.
The preparation steps of the water-based anti-corrosion rust conversion coating are as follows:
step a, weighing all components according to the design proportion of the water-based anti-corrosion rust-converting coating, uniformly stirring the weighed water-based anti-corrosion rust-converting emulsion, a pH regulator, a film-forming auxiliary agent and deionized water, adding the rest deionized water, a defoaming agent, a dispersing agent, a wetting agent and a pigment filler, and uniformly stirring and mixing to obtain a first slurry;
b, grinding the first slurry to the fineness of less than or equal to 30 microns, and filtering by using 200-mesh filter cloth to obtain a second slurry;
and c, adding the second slurry into a stirring cylinder, stirring at 900r/min, adding the rest defoaming agent and the anti-flash rust agent into the second slurry, uniformly stirring and mixing, adding a thickening agent, and adjusting the stormer viscosity to 25 ℃ to 75KU to obtain the water-based anti-corrosion rust-converting coating.
Example 2
The embodiment of the invention provides a water-based anti-corrosion rust conversion coating, which comprises the following components in parts by weight:
47.5 parts of water-based anti-corrosion rust-converting emulsion, 0.2 part of defoaming agent, 0.6 part of dispersing agent, 0.2 part of anti-flash rust agent, 0.4 part of thickening agent, 0.3 part of pH regulator, 0.4 part of wetting agent, 30 parts of pigment and filler, 4 parts of film-forming additive and 20 parts of deionized water.
The types of the components are the same as those in example 1, and the description is omitted.
The preparation steps of the water-based anti-corrosion rust conversion coating are as follows:
step a, weighing all components according to the design proportion of the water-based anti-corrosion rust-converting coating, uniformly stirring the weighed water-based anti-corrosion rust-converting emulsion, a pH regulator, a film-forming auxiliary agent and deionized water, adding the rest deionized water, a defoaming agent, a dispersing agent, a wetting agent and a pigment filler, and uniformly stirring and mixing to obtain a first slurry;
b, grinding the first slurry to the fineness of less than or equal to 30 microns, and filtering by using 200-mesh filter cloth to obtain a second slurry;
and c, adding the second slurry into a stirring cylinder, stirring at 900r/min, adding the rest defoaming agent and the anti-flash rust agent into the second slurry, uniformly stirring and mixing, adding a thickening agent, and adjusting the stormer viscosity to 25 ℃ to 80KU to obtain the water-based anti-corrosion rust-converting coating.
Example 3
The embodiment of the invention provides a water-based anti-corrosion rust conversion coating, which comprises the following components in parts by weight:
50 parts of water-based anti-corrosion rust-converting emulsion, 0.2 part of defoaming agent, 0.6 part of dispersing agent, 0.2 part of anti-flash rust agent, 0.4 part of thickening agent, 0.3 part of pH regulator, 0.5 part of wetting agent, 30 parts of pigment and filler, 4 parts of film-forming assistant and 20 parts of deionized water.
The types of the components are the same as those in example 1, and the description is omitted.
The preparation steps of the water-based anti-corrosion rust conversion coating are as follows:
step a, weighing all components according to the design proportion of the water-based anti-corrosion rust-converting coating, uniformly stirring the weighed water-based anti-corrosion rust-converting emulsion, a pH regulator, a film-forming auxiliary agent and deionized water, adding the rest deionized water, a defoaming agent, a dispersing agent, a wetting agent and a pigment filler, and uniformly stirring and mixing to obtain a first slurry;
b, grinding the first slurry to the fineness of less than or equal to 30 microns, and filtering by using 200-mesh filter cloth to obtain a second slurry;
and c, adding the second slurry into a stirring cylinder, stirring at 900r/min, adding the rest defoaming agent and the anti-flash rust agent into the second slurry, uniformly stirring and mixing, adding a thickening agent, and adjusting the stormer viscosity to 25 ℃ to 85KU to obtain the water-based anti-corrosion rust-converting coating.
To better illustrate the characteristics of the water-based anti-corrosive rust-converting paint provided by the embodiment of the invention, the water-based anti-corrosive rust-converting paint prepared in the above examples 1-3 was subjected to quality inspection, and the results are shown in Table 1.
TABLE 1 technical indices of the aqueous anti-corrosive rust-converting coatings prepared in examples 1-3
Main technical indexes
In conclusion, the water-based anti-corrosion rust conversion coating prepared by the invention has the advantages of excellent initial water resistance, acid and alkali resistance, salt spray resistance and wear resistance, low VOC content, safety, environmental protection and higher practical value. The rust remover can be directly coated on the corroded metal surface without strict rust removal and surface treatment, is very suitable for various steel components which are difficult to completely treat the surface, and can convert active rust into a stable and harmless substance, thereby achieving the dual purposes of removing rust and protecting a matrix.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. The water-based anti-corrosion rust conversion coating is characterized by comprising the following components in parts by weight: 40-50 parts of water-based anti-corrosion rust-converting emulsion, 0.1-0.3 part of defoaming agent, 0.5-1 part of dispersing agent, 0.1-0.5 part of anti-flash rust agent, 0.2-1 part of thickening agent, 0.1-0.5 part of pH regulator, 0.1-1 part of wetting agent, 20-30 parts of pigment and filler, 2-5 parts of film-forming assistant and 10-20 parts of deionized water;
the water-based anti-corrosion rust conversion coating comprises the following components in parts by weight: 45-50 parts of water-based anti-corrosion rust-converting emulsion, 0.1-0.3 part of defoaming agent, 0.5-1 part of dispersing agent, 0.1-0.5 part of anti-flash rust agent, 0.2-1 part of thickening agent, 0.1-0.5 part of pH regulator, 0.1-1 part of wetting agent, 25-30 parts of pigment and filler, 4-5 parts of film-forming additive and 15-20 parts of deionized water;
the water-based anti-corrosion rust conversion emulsion is a polyphenol hydroxyl compound, can generate complexing action with iron ions in rust, and can react with small molecular substances by utilizing the principle that phenolic hydroxyl in the water-based anti-corrosion rust conversion emulsion can be coordinated with the iron ions to generate a stable complex, so that a novel rust conversion body is obtained; the defoaming agent is polyether siloxane copolymer; the thickening agent is a polyurethane type thickening agent; the pH regulator is triethylamine; the wetting agent is a polyether siloxane copolymer; the pigment filler is a mixture of titanium dioxide, carbon black and barium sulfate; the film-forming auxiliary agent is ethylene glycol tertiary butyl ether; the flash rust inhibitor is a nitrite aqueous solution;
the dispersant is an aqueous solution of a polymer containing a surfactant and pigment affinity groups.
2. The aqueous anti-corrosion rust conversion coating of claim 1, which comprises the following components in parts by weight: 50 parts of water-based anti-corrosion rust-converting emulsion, 0.2 part of defoaming agent, 0.6 part of dispersing agent, 0.2 part of anti-flash rust agent, 0.4 part of thickening agent, 0.3 part of pH regulator, 0.5 part of wetting agent, 30 parts of pigment and filler, 4 parts of film-forming assistant and 20 parts of deionized water.
3. The preparation method of the water-based anti-corrosion rust conversion coating is characterized by comprising the following steps of:
step a, weighing each component according to the design proportion of the water-based anti-corrosion rust-converting coating of claim 1, uniformly stirring the weighed water-based anti-corrosion rust-converting emulsion, a pH regulator, a film-forming auxiliary agent and deionized water, adding the rest of deionized water, a defoaming agent, a dispersing agent, a wetting agent and a pigment filler, and uniformly stirring and mixing to obtain a first slurry;
b, grinding the first slurry to the fineness of less than or equal to 30 microns, and filtering to obtain a second slurry;
and c, adding the rest defoaming agent and the anti-flash rust agent into the second slurry, stirring and mixing uniformly, adding the thickening agent, and adjusting the stormer viscosity to 25 ℃ to 75-85KU to obtain the water-based anti-corrosion rust-converting coating.
4. The use of the aqueous anti-corrosive rust-converting coating according to claim 1 for direct coating of a corroded metal surface.
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| CN115181497A (en) * | 2022-04-27 | 2022-10-14 | 厦门百正防腐工程有限公司 | Anticorrosion and reinforcing coating applied to steel bars in concrete |
| CN116463014A (en) * | 2023-03-23 | 2023-07-21 | 河北晨阳工贸集团有限公司 | Water-based rust-carrying rust-transferring paint and preparation method thereof |
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Application publication date: 20210226 |