CN114561117A - Anticorrosive paint, preparation method and application thereof - Google Patents
Anticorrosive paint, preparation method and application thereof Download PDFInfo
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- CN114561117A CN114561117A CN202210080604.6A CN202210080604A CN114561117A CN 114561117 A CN114561117 A CN 114561117A CN 202210080604 A CN202210080604 A CN 202210080604A CN 114561117 A CN114561117 A CN 114561117A
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- epoxy resin
- mixed solution
- thiophene
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- novolac epoxy
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000011259 mixed solution Substances 0.000 claims abstract description 78
- 238000000576 coating method Methods 0.000 claims abstract description 57
- 239000011248 coating agent Substances 0.000 claims abstract description 56
- 238000001723 curing Methods 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 229920000123 polythiophene Polymers 0.000 claims abstract description 32
- 229910001096 P alloy Inorganic materials 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000003822 epoxy resin Substances 0.000 claims abstract description 20
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 148
- 239000004843 novolac epoxy resin Substances 0.000 claims description 83
- 229930192474 thiophene Natural products 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 20
- KVERSUWFQVBYQU-UHFFFAOYSA-N N1=PN=PN=P1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1 Chemical compound N1=PN=PN=P1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1.N1C=NC=C1 KVERSUWFQVBYQU-UHFFFAOYSA-N 0.000 claims description 19
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 16
- DFPJRUKWEPYFJT-UHFFFAOYSA-N 1,5-diisocyanatopentane Chemical compound O=C=NCCCCCN=C=O DFPJRUKWEPYFJT-UHFFFAOYSA-N 0.000 claims description 14
- FBHPRUXJQNWTEW-UHFFFAOYSA-N 1-benzyl-2-methylimidazole Chemical compound CC1=NC=CN1CC1=CC=CC=C1 FBHPRUXJQNWTEW-UHFFFAOYSA-N 0.000 claims description 14
- MQJKPEGWNLWLTK-UHFFFAOYSA-N Dapsone Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 MQJKPEGWNLWLTK-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 14
- JDVIRCVIXCMTPU-UHFFFAOYSA-N ethanamine;trifluoroborane Chemical compound CCN.FB(F)F JDVIRCVIXCMTPU-UHFFFAOYSA-N 0.000 claims description 14
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- 238000007598 dipping method Methods 0.000 claims description 5
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- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- ZMANZCXQSJIPKH-UHFFFAOYSA-N N,N-Diethylethanamine Substances CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims 1
- 238000007747 plating Methods 0.000 abstract description 17
- 239000000126 substance Substances 0.000 abstract description 17
- 238000005536 corrosion prevention Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 36
- 239000010959 steel Substances 0.000 description 36
- 239000000203 mixture Substances 0.000 description 24
- 238000002791 soaking Methods 0.000 description 24
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- 229910052961 molybdenite Inorganic materials 0.000 description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 4
- 239000002135 nanosheet Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
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- 125000000524 functional group Chemical group 0.000 description 3
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- 230000008859 change Effects 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Chemical group CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
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- 229920001568 phenolic resin Polymers 0.000 description 1
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Images
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an anticorrosive paint for post-treatment of chemical plating Ni-W-P alloy, a preparation method thereof and application of the anticorrosive paint in corrosion prevention. The preparation method of the anticorrosive paint comprises the steps of dispersing water-soluble polythiophene in a solvent to obtain a mixed solution A; adding phenolic epoxy resin into the mixed solution A, and stirring to obtain a mixed solution B; and adding a curing agent and an accelerator into the mixed solution B, and stirring to obtain the anticorrosive paint. The anticorrosive coating has both organic coating physical isolation protection and cathode protection, particularly has good anticorrosive effect on Ni-W-P alloy, can be prepared by a simple method, has low cost, and is suitable for industrialization.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an anticorrosive coating, and a preparation method and application thereof.
Background
The metal material can generate physical and chemical reactions with media in the environment in which the metal material is located in the using process, so that the metal surface is corroded, and the characteristics and the service life of the metal material are directly influenced. Therefore, for metal substrates obtained by electroplating or electroless plating methods, post-treatment of the metal surface after plating is required to improve the corrosion resistance of the plating layer.
One of the post-treatment processes is to coat the plating layer with an organic anti-corrosion coating to form a solid, compact and high-stability protective layer on the surface of the plating layer, and the protective layer can physically isolate the metal substrate from a corrosive medium in the surrounding environment, so that the effect of preventing or slowing down corrosion is achieved. The organic anticorrosive paint in the current market mainly adopts epoxy resin, the molecule of the epoxy resin contains more than two epoxy groups, and the epoxy groups have strong chemical activity and can be cured and crosslinked under certain conditions to generate a net structure, so that the organic anticorrosive paint has good thermal stability. Meanwhile, the epoxy resin has excellent adhesive force and corrosion resistance due to the existence of active groups such as benzene rings, ether bonds, hydroxyl groups and the like in the molecular structure. The defects of the pure epoxy resin serving as the anticorrosive paint are that the formed coating has poor toughness, brittle texture and poor impact damage resistance, so that the application of the epoxy resin paint has certain limitation.
CN 112680066A proposes using PANI (polyaniline)/single-layer MoS2Scheme for modifying epoxy resin by intercalating PANI in MoS2An intercalation structure is formed among the layers of the nanosheets, the compactness of the coating is improved, and then the nanosheets are uniformly mixed with the epoxy resin to combine the barrier property of the epoxy resin, so that the epoxy composite coating with excellent corrosion resistance is obtained. The drawback of this approach is the single layer MoS2Nanosheets are not readily prepared and MoS2The intercalation reaction of the nano-sheets and the PANI is complex, and the mass production is difficult. Similarly, although the method of using graphene and polyaniline modified epoxy resin coating can improve the corrosion resistance, hardness and glossiness of the coating, the cost of graphene is high and is not dominant in practical application and commercial development.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to: provides an anticorrosive paint, a preparation method thereof and application of the anticorrosive paint in corrosion prevention.
In order to achieve the purpose, the invention provides the following technical scheme: in one aspect, the invention provides a preparation method of an anticorrosive paint, which comprises the following steps:
the method comprises the following steps: dispersing water-soluble polythiophene in a solvent to obtain a mixed solution A;
step two: adding phenolic epoxy resin into the mixed solution A, and stirring to obtain a mixed solution B;
step three: and adding a curing agent and an accelerator into the mixed solution B, and stirring to obtain the anticorrosive paint.
The phenolic epoxy resin is used as a base material, is a multifunctional epoxy resin, and can provide more crosslinking points during curing compared with the phenolic resin and the epoxy resin, so that a three-dimensional structure with high crosslinking degree is easily formed, and a coating has higher hardness and good adhesive force. In addition, the anticorrosion effect of the single organic anticorrosion coating on the metal surface comes from the physical isolation effect, and the organic coating inevitably suffers from the impact of external force and is degraded with the passage of time, so that the metal substrate is exposed to the surrounding environment, and the corrosion is caused.
According to the invention, water-soluble polythiophene is further added into the novolac epoxy resin base material to modify the novolac epoxy resin base material, and hydrophilic ionic functional groups exist on the side chains of the molecules of the water-soluble polythiophene, so that electrostatic action and hydrogen bond action can be formed between the water-soluble polythiophene and the novolac epoxy resin, thus the water-soluble polythiophene is in close contact with the novolac epoxy resin, the compactness of the coating is improved, and the coating further has better water resistance, chemical medium resistance and corrosion resistance. In addition, the water-soluble polythiophene is a conductive polymer, and can react on the surface of metal to form a passivation layer so as to change the corrosion potential of the metal, so that the electrochemical stability and the conductivity of the coating can be improved, the cathode protection effect is achieved, and the coating has both physical isolation protection and cathode protection of an organic coating, so that the effective life of the coating is prolonged.
The anticorrosive paint is also added with a curing agent and an accelerator, wherein the curing agent contains active groups, and the active groups can perform crosslinking reaction with the active groups in the novolac epoxy resin to generate a product with stable structure. The accelerator is used for promoting the curing reaction between the novolac epoxy resin and the curing agent. The preparation method is simple and easy to operate, does not relate to a reaction process under harsh conditions, is suitable for large-scale production, and has practicability. And the anticorrosive paint does not need to modify the epoxy resin by using a nano material with higher cost, and has economical efficiency.
The water-soluble polythiophene is at least one of poly (3-hydroxypropyl-1-alkenyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ], and preferably is poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ].
In the first step, the concentration of the water-soluble polythiophene in the mixed solution A is preferably 0.1-0.5 mg/mL, so that the obtained anticorrosive paint has excellent water resistance, chemical medium resistance and corrosion resistance.
The mass ratio of the water-soluble polythiophene to the phenolic epoxy resin is 0.5: 100-5: 100, and preferably 0.5: 100-4: 100.
And in the second step, after phenolic epoxy resin is added, carrying out ultrasonic treatment at the temperature of 10-35 ℃, wherein the ultrasonic frequency is 20-50 kHz, 25kHz is preferred, the ultrasonic time is 30-60 min preferably, and carrying out the stirring process after the ultrasonic treatment is finished.
The stirring time in the second step is preferably 1-2 h, and the stirring speed is preferably 100-1000 rpm, and more preferably 100-500 rpm; in the third step, the stirring time of the stirring is preferably 15-45 min.
The accelerant is at least one of hexa-imidazole cyclotriphosphazene, 1-benzyl-2-methylimidazole and boron trifluoride monoethylamine, and the hexa-imidazole cyclotriphosphazene is preferred.
The mass ratio of the accelerator to the novolac epoxy resin is 0.1: 100-10: 100, and preferably 0.1: 100-5: 100.
The curing agent is at least one of diamino diphenyl sulfone, methyl hexahydrophthalic anhydride and pentamethylene diisocyanate, wherein the methyl hexahydrophthalic anhydride is preferred. The mass ratio of the curing agent to the novolac epoxy resin is 0.05: 100-5: 100, and preferably 0.05: 100-2: 100.
The solvent is an alcohol solvent, and can be selected from one or more of ethanol, butanol and isopropanol, wherein isopropanol is preferred.
The invention also aims to provide the anticorrosive paint which is prepared by the preparation method of the anticorrosive paint in the technical scheme. The anticorrosive coating has physical isolation protection generated by novolac epoxy resin and cathode protection generated by the water-soluble polythiophene, so that the anticorrosive service life of a coating formed by the coating can be effectively prolonged. The electrostatic interaction and the hydrogen bond interaction between the water-soluble polythiophene and the novolac epoxy resin can further improve the compactness of the coating, and further improve the corrosion resistance of the coating.
In addition, the invention also relates to the application of the anticorrosive paint in the technical scheme, which comprises the steps of forming the anticorrosive paint on the surface of a substrate; and curing the anticorrosive coating to form an anticorrosive film on the surface of the base material. Wherein the substrate comprises primarily metals and alloys, such as, but not limited to, substrates surface plated with Ni-W-P alloys by electroless plating methods. The anticorrosive coating can be used in the surface post-treatment process of the Ni-W-P alloy to form an anticorrosive film on the surface of the Ni-W-P alloy. Specifically, the method of forming the anticorrosive coating on the surface of the substrate is, for example, dipping, spraying, applying with a brush or a roller, or the like. The method is simple to operate, the formed anticorrosive film is uniform, and the dipping time can be controlled to be 25-55 s. The curing method can be, for example, drying in hot air flow at 50-75 ℃ for 10-25 min. Wherein the preferable dipping time is 25-35 s, the drying temperature in hot air is 50-60 ℃, and the drying time is 10-20 min. The dipping time can enable the anticorrosive coating to completely cover the base material and form an anticorrosive film with moderate thickness, and the curing time and temperature can effectively remove most of water in the anticorrosive film, so that the anticorrosive coating is cured into a stable coating on the surface of the base material.
Compared with the prior art, the invention has the following beneficial effects: 1) the anticorrosive coating provided by the invention adopts the novolac epoxy resin as a base material, and is modified by the water-soluble polythiophene, and under a better proportioning scheme, the anticorrosive coating has better water resistance, chemical medium resistance and corrosion resistance while keeping high hardness and high adhesive force of the original novolac epoxy resin; 2) the addition of the water-soluble polythiophene can improve the electrochemical stability and the electrical conductivity of the organic coating, so that the coating has physical isolation protection and cathode protection of an organic coating after film formation, thereby prolonging the anti-corrosion service life of the coating; 3) the preparation method of the anticorrosive coating provided by the invention is simple and easy to operate, and the ionic functional group on the side chain of the water-soluble polythiophene molecule and the active functional group on the novolac epoxy resin are in close contact under the conditions of ultrasound and stirring by utilizing the electrostatic action and the hydrogen bond action; 4) compared with the prior art, the preparation process of the anticorrosive paint does not involve modifying the epoxy resin by using a high-cost nano material, so that the anticorrosive paint is low in cost and economical.
Drawings
In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained based on these drawings without inventive efforts.
FIG. 1 is a flow chart of a preparation method of an anticorrosive paint provided by the invention.
Detailed Description
The technical solutions in the specific embodiments of the present invention will be clearly and completely described below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flow chart showing a preparation method of an anticorrosive paint provided by the present invention, and the preparation method comprises three steps:
s1: dispersing water-soluble polythiophene in a solvent to obtain a mixed solution A;
s2: adding phenolic epoxy resin into the mixed solution A, and stirring to obtain a mixed solution B;
s3: and adding a curing agent and an accelerator into the mixed solution B, and stirring to obtain the anticorrosive paint.
The parameters in the above three steps are specifically described below with reference to examples and comparative examples:
example 1
S1: poly 3- (3-hydroxypropyl-1-alkenyl) thiophene was dispersed in ethanol to obtain a mixed solution A, and the concentration of poly 3- (3-hydroxypropyl-1-alkenyl) thiophene in the mixed solution A was 0.1 mg/mL.
S2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the addition amount of the poly 3- (3-hydroxypropyl-1-alkenyl) thiophene to the novolac epoxy resin is 0.5:100, performing ultrasonic dispersion for 30min, setting the temperature to be 20 ℃, and setting the frequency to be 5 kHz. After the ultrasonic dispersion, the mixture was stirred at 100rpm for 1 hour to obtain a mixed solution B.
S3: and then adding hexa-imidazole cyclotriphosphazene (accelerator) and diamino diphenyl sulfone (curing agent) into the mixed solution B, wherein the mass ratio of the addition amount of the hexa-imidazole cyclotriphosphazene to the addition amount of the novolac epoxy resin is 0.1:100, and the mass ratio of the addition amount of the diamino diphenyl sulfone to the addition amount of the novolac epoxy resin is 0.05:100, and continuously stirring for 10min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 25s, and drying the steel plate in hot air flow at 50 ℃ for 10min after soaking.
Example 2
S1: poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] was dispersed in butanol to obtain a mixed solution A, and the concentration of poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] in the mixed solution A was 0.3 mg/mL.
S2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the addition amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] to the novolac epoxy resin is 2:100, performing ultrasonic dispersion for 40min, setting the temperature to be 10 ℃ and the frequency to be 15 kHz. After the ultrasonic dispersion, the mixture was stirred at 300rpm for 1 hour to obtain a mixed solution B.
S3: and then adding 1-benzyl-2-methylimidazole (an accelerator) and methylhexahydrophthalic anhydride (a curing agent) into the mixed solution B, wherein the mass ratio of the adding amount of 1-benzyl-2-methylimidazole to the adding amount of novolac epoxy resin is 5:100, and the mass ratio of the adding amount of methylhexahydrophthalic anhydride to the adding amount of novolac epoxy resin is 2:100, and continuously stirring for 5min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
Example 3
S1: poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] is dispersed in isopropanol to obtain a mixed solution A, and the concentration of the poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A is 0.2 mg/mL.
S2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the addition amount of the poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] to the novolac epoxy resin is 4:100, carrying out ultrasonic dispersion for 50min, setting the temperature to be 25 ℃ and the frequency to be 10 kHz. After the ultrasonic dispersion, the mixture was stirred at 500rpm for 1 hour to obtain a mixed solution B.
S3: then adding boron trifluoride monoethylamine (accelerator) and pentamethylene diisocyanate (curing agent) into the mixed solution B, wherein the mass ratio of the addition amount of the boron trifluoride monoethylamine to the addition amount of the novolac epoxy resin is 3:100, and the mass ratio of the addition amount of the pentamethylene diisocyanate to the addition amount of the novolac epoxy resin is 1:100, and continuously stirring for 10min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 35s, and drying the steel plate in hot air flow at 55 ℃ for 20min after soaking.
Example 4
S1: poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] were dispersed in butanol to obtain a mixed solution A, and the concentration of poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] in the mixed solution A was 0.5 mg/mL.
S2: adding novolac epoxy resin, poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] into the mixed solution A, wherein the mass ratio of the addition amount of the novolac epoxy resin to the addition amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] is 5:100, performing ultrasonic dispersion for 45min, setting the temperature to be 30 ℃ and the frequency to be 35 kHz. After the ultrasonic dispersion, the mixture was stirred at 800rpm for 2 hours to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene and 1-benzyl-2-methylimidazole (accelerator) into the mixed solution B, wherein the mass ratio of the addition amount of the hexaimidazole cyclotriphosphazene to the addition amount of the novolac epoxy resin is 10:100, and the mass ratio of the addition amount of the 1-benzyl-2-methylimidazole to the addition amount of the novolac epoxy resin is 5: 100. Simultaneously adding diaminodiphenyl sulfone and methylhexahydrophthalic anhydride (curing agent), wherein the mass ratio of the adding amount of the diaminodiphenyl sulfone to the adding amount of the novolac epoxy resin is 4:100, and the mass ratio of the adding amount of the methylhexahydrophthalic anhydride to the adding amount of the novolac epoxy resin is 2:100, and continuously stirring for 55min to uniformly mix the materials to obtain the anticorrosive coating.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 45s, and drying the steel plate in hot air flow at 65 ℃ for 20min after soaking.
Example 5
S1: poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] were dispersed in isopropanol to obtain a mixed solution A, and the total concentration of poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A was 0.4 mg/mL.
S2: adding novolac epoxy resin, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] into the mixed solution A, wherein the mass ratio of the added amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] to the added amount of the novolac epoxy resin is 2.5:100, carrying out ultrasonic dispersion for 35min, setting the temperature to be 35 ℃, and setting the frequency to be 40 kHz. After the ultrasonic dispersion, the mixture was stirred at 650rpm for 2 hours to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene and boron trifluoride monoethylamine (accelerator) into the mixed solution B, wherein the mass ratio of the addition amounts of the hexaimidazole cyclotriphosphazene and the novolac epoxy resin is 6:100, and the mass ratio of the addition amounts of the boron trifluoride monoethylamine and the novolac epoxy resin is 4: 100. And simultaneously adding methyl hexahydrophthalic anhydride and pentamethylene diisocyanate (curing agent), wherein the mass ratio of the addition amount of the methyl hexahydrophthalic anhydride to the addition amount of the novolac epoxy resin is 5:100, and the mass ratio of the addition amount of the pentamethylene diisocyanate to the addition amount of the novolac epoxy resin is 3:100, and continuously stirring for 65min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 50s, and drying the steel plate in hot air flow at 70 ℃ for 25min after soaking.
Example 6
S1: poly 3- (3-hydroxypropyl-1-enyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] were dispersed in ethanol to obtain a mixed solution A, and the total concentration of poly 3- (3-hydroxypropyl-1-enyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A was 0.2 mg/mL.
S2: and adding novolac epoxy resin, poly 3- (3-hydroxypropyl-1-alkenyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] into the mixed solution A, wherein the mass ratio of the total mass of the poly [3- (3-hydroxypropyl-1-alkenyl) thiophene ] and the poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] to the added amount of the novolac epoxy resin is 2:100, performing ultrasonic dispersion for 45min, setting the temperature to be 25 ℃, and setting the frequency to be 25 kHz. After the ultrasonic dispersion, the mixture was stirred at 1000rpm for 1 hour to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene, 1-benzyl-2-methylimidazole and boron trifluoride monoethylamine (accelerator) into the mixed solution B, wherein the mass ratio of the addition amounts of the hexaimidazole cyclotriphosphazene and the novolac epoxy resin is 1:100, the mass ratio of the addition amounts of the 1-benzyl-2-methylimidazole and the novolac epoxy resin is 2:100, and the mass ratio of the addition amounts of the boron trifluoride monoethylamine and the novolac epoxy resin is 3: 100. Simultaneously adding diamino diphenyl sulfone, methyl hexahydro phthalic anhydride and pentamethylene diisocyanate (curing agent), wherein the mass ratio of the adding amount of the diamino diphenyl sulfone to the adding amount of the novolac epoxy resin is 0.5:100, the mass ratio of the adding amount of the methyl hexahydro phthalic anhydride to the adding amount of the novolac epoxy resin is 1:100, and the mass ratio of the adding amount of the pentamethylene diisocyanate to the adding amount of the novolac epoxy resin is 2:100, and continuously stirring for 50min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 55s, and drying the steel plate in hot air flow at 75 ℃ for 15min after soaking.
Comparative example 1
S1: poly 3- (3-hydroxypropyl-1-alkenyl) thiophene was dispersed in ethanol to obtain a mixed solution A, and the concentration of poly 3- (3-hydroxypropyl-1-alkenyl) thiophene in the mixed solution A was 0.01 mg/mL.
S2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the addition amount of the poly 3- (3-hydroxypropyl-1-alkenyl) thiophene to the novolac epoxy resin is 0.1:100, performing ultrasonic dispersion for 30min, setting the temperature to be 5 ℃ and the frequency to be 25 kHz. After the ultrasonic dispersion, the mixture was stirred at 80rpm for 0.5 hour to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene (accelerator) and diamino diphenyl sulfone (curing agent) into the mixed solution B, wherein the mass ratio of the addition amount of the hexaimidazole cyclotriphosphazene to the addition amount of the novolac epoxy resin is 0.1:100, and the mass ratio of the addition amount of the diamino diphenyl sulfone to the addition amount of the novolac epoxy resin is 0.05:100, and continuously stirring for 20min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in hot air flow at 65 ℃ for 15min after soaking.
Comparative example 2
S1: poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] was dispersed in butanol to obtain a mixed solution A, and the concentration of poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] in the mixed solution A was 0.02 mg/mL.
S2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the addition amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] to the novolac epoxy resin is 0.2:100, performing ultrasonic dispersion for 40min, setting the temperature to be 6 ℃ and the frequency to be 30 kHz. After the ultrasonic dispersion, the mixture was stirred at 50rpm for 0.5 hour to obtain a mixed solution B.
S3: and then adding 1-benzyl-2-methylimidazole (an accelerator) and methylhexahydrophthalic anhydride (a curing agent) into the mixed solution B, wherein the mass ratio of the adding amount of the 1-benzyl-2-methylimidazole to the adding amount of the novolac epoxy resin is 5:100, and the mass ratio of the adding amount of the methylhexahydrophthalic anhydride to the adding amount of the novolac epoxy resin is 2:100, and continuously stirring for 15min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
Comparative example 3
S1: dispersing poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in isopropanol to obtain a mixed solution A, wherein the concentration of the poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A is 0.03 mg/mL;
s2: adding novolac epoxy resin into the mixed solution A, wherein the mass ratio of the poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] to the added novolac epoxy resin is 0.4:100, performing ultrasonic dispersion for 50min, setting the temperature to be 8 ℃ and the frequency to be 20 kHz. After the ultrasonic dispersion, the mixture was stirred at 65rpm for 0.5 hour to obtain a mixed solution B.
S3: then adding boron trifluoride monoethylamine (accelerator) and pentamethylene diisocyanate (curing agent) into the mixed solution B, wherein the mass ratio of the addition amount of the boron trifluoride monoethylamine to the addition amount of the novolac epoxy resin is 3:100, and the mass ratio of the addition amount of the pentamethylene diisocyanate to the addition amount of the novolac epoxy resin is 1:100, and continuously stirring for 30min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
Comparative example 4
S1: poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] were dispersed in butanol to obtain a mixed solution A, and the total concentration of poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] in the mixed solution A was 0.6 mg/mL.
S2: adding novolac epoxy resin, poly 3- (3-hydroxypropyl-1-alkenyl) thiophene and poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] into the mixed solution A, wherein the mass ratio of the addition amount of the novolac epoxy resin to the addition amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] is 6:100, performing ultrasonic dispersion for 45min, setting the temperature to be 40 ℃ and the frequency to be 55 kHz. After the ultrasonic dispersion, the mixture was stirred at 1100rpm for 3 hours to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene and 1-benzyl-2-methylimidazole (accelerator) into the mixed solution B, wherein the mass ratio of the addition amount of the hexaimidazole cyclotriphosphazene to the addition amount of the novolac epoxy resin is 10:100, and the mass ratio of the addition amount of the 1-benzyl-2-methylimidazole to the addition amount of the novolac epoxy resin is 5: 100. Simultaneously adding diaminodiphenyl sulfone and methylhexahydrophthalic anhydride (curing agent), wherein the mass ratio of the adding amount of the diaminodiphenyl sulfone to the adding amount of the novolac epoxy resin is 4:100, and the mass ratio of the adding amount of the methylhexahydrophthalic anhydride to the adding amount of the novolac epoxy resin is 2:100, and continuously stirring for 45min to uniformly mix the materials to obtain the anticorrosive coating.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
Comparative example 5
S1: poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] were dispersed in isopropanol to obtain a mixed solution A, and the total concentration of poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A was 0.8 mg/mL.
S2: adding novolac epoxy resin, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] into the mixed solution A, wherein the mass ratio of the added amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] to the added amount of the novolac epoxy resin is 7.5:100, carrying out ultrasonic dispersion for 35min, setting the temperature to be 45 ℃ and the frequency to be 60 kHz. After the ultrasonic dispersion, the mixture was stirred at 1050rpm for 2.5 hours to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene and boron trifluoride monoethylamine (accelerator) into the mixed solution B, wherein the mass ratio of the addition amounts of the hexaimidazole cyclotriphosphazene and the novolac epoxy resin is 6:100, and the mass ratio of the addition amounts of the boron trifluoride monoethylamine and the novolac epoxy resin is 4: 100. And simultaneously adding methyl hexahydrophthalic anhydride and pentamethylene diisocyanate (curing agent), wherein the mass ratio of the addition amount of the methyl hexahydrophthalic anhydride to the addition amount of the novolac epoxy resin is 5:100, and the mass ratio of the addition amount of the pentamethylene diisocyanate to the addition amount of the novolac epoxy resin is 3:100, and continuously stirring for 35min to uniformly mix the materials to obtain the anticorrosive coating.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
Comparative example 6
S1: poly 3- (3-hydroxypropyl-1-enyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] were dispersed in ethanol to obtain a mixed solution A, and the total concentration of poly 3- (3-hydroxypropyl-1-enyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] in the mixed solution A was 1.0 mg/mL.
S2: adding novolac epoxy resin, poly 3- (3-hydroxypropyl-1-alkenyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N, N-triethylamine) thiophene ] into the mixed solution A, wherein the mass ratio of the added amount of the novolac epoxy resin to the added amount of the poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] to the added amount of the novolac epoxy resin is 9:100, ultrasonically dispersing for 45min, setting the temperature to be 55 ℃, and setting the frequency to be 65 kHz. After the ultrasonic dispersion, the mixture was further stirred at 1200rpm for 3.5 hours to obtain a mixed solution B.
S3: and then adding hexaimidazole cyclotriphosphazene, 1-benzyl-2-methylimidazole and boron trifluoride monoethylamine (accelerator) into the mixed solution B, wherein the mass ratio of the addition amounts of the hexaimidazole cyclotriphosphazene and the novolac epoxy resin is 1:100, the mass ratio of the addition amounts of the 1-benzyl-2-methylimidazole and the novolac epoxy resin is 2:100, and the mass ratio of the addition amounts of the boron trifluoride monoethylamine and the novolac epoxy resin is 3: 100. Simultaneously adding diamino diphenyl sulfone, methyl hexahydro phthalic anhydride and pentamethylene diisocyanate (curing agent), wherein the mass ratio of the adding amount of the diamino diphenyl sulfone to the adding amount of the novolac epoxy resin is 0.5:100, the mass ratio of the adding amount of the methyl hexahydro phthalic anhydride to the adding amount of the novolac epoxy resin is 1:100, and the mass ratio of the adding amount of the pentamethylene diisocyanate to the adding amount of the novolac epoxy resin is 2:100, and continuously stirring for 40min to uniformly mix the materials to obtain the anticorrosive paint.
The application of the anticorrosive paint in the corrosion prevention of the Ni-W-P alloy is as follows: coating Ni-W-P alloy on a steel plate with the specification of 100mm multiplied by 100mm in a conventional mode in the chemical plating field, soaking the steel plate in the prepared anticorrosive paint for 30s, and drying the steel plate in 60 ℃ hot air flow for 15min after soaking.
The Ni-W-P alloys coated with the anticorrosive thin film obtained in the above examples 1 to 6 and comparative examples 1 to 6 were subjected to performance tests, and the results were as follows:
from the above test results, it can be seen that: 1) the concentration of the water-soluble polythiophene in the examples 1-3 is 0.1-0.3 mg/mL, the concentration of the water-soluble polythiophene in the comparative examples 1-3 is 0.01-0.03 mg/mL, the ultrasonic temperature (10-25 ℃) and the stirring speed (100-500 rpm) in the examples 1-3 are higher than the ultrasonic temperature (5-8 ℃) and the stirring speed (50-80 rpm) in the comparative examples 1-3, and the anti-corrosion film obtained in the examples 1-3 has bright glossiness, does not foam, does not fall off or change color in a water resistance test, and is not corroded for 470-480 h in an NSS test. The anticorrosive films obtained in the comparative examples 1-3 have dark gloss, and have the phenomena of foaming, falling and discoloration in a water resistance test, and can only be maintained for 230-240 hours in an NSS test. Thus, the gloss, water resistance and corrosion resistance of the anticorrosive films obtained in examples 1 to 3 are superior to those of the films in comparative examples 1 to 3; the water-soluble polythiophene in examples 4 to 6 was 0.2 to 0.5mg/mL, the water-soluble polythiophene in comparative examples 4 to 6 was 0.6 to 1.0mg/mL, and both the ultrasonic temperature (25 to 35 ℃) and the stirring speed (650 to 1000rpm) in examples 4 to 6 were lower than those (40 to 55 ℃) and the stirring speed (1050 to 1200rpm) in comparative examples 4 to 6, and further, the ultrasonic frequency (25 to 40kHz) in examples 4 to 6 was lower than those (55 to 65kHz) in comparative examples 4 to 6, and it was found that the gloss of the anticorrosive film obtained in examples 4 to 6 was bright, foaming occurred at 1 to 2 in the water resistance test, no peeling, slight discoloration, and no corrosion was maintained for 300 hours in the NSS test, as a result of testing the performance of the anticorrosive film. The anticorrosive films obtained in comparative examples 4-6 have dark gloss, and have the phenomena of foaming, falling and discoloration in a water resistance test, and can only be maintained for 235-240 hours in an NSS test. Thus, the gloss, water resistance and corrosion resistance of the anticorrosive films obtained in examples 4 to 6 are superior to those of the films in comparative examples 4 to 6. Therefore, in combination with the embodiments 1 to 6, when the concentration of the water-soluble polythiophene in the anticorrosive coating is 0.1 to 0.5mg/mL, the ultrasonic temperature is 10 to 35 ℃, the stirring speed is 100 to 1000rpm, and the ultrasonic frequency is 25 to 40kHz, the anticorrosive thin film obtained by curing has excellent performance, which indicates that the concentration, the ultrasonic temperature, the ultrasonic frequency and the stirring speed of the water-soluble polythiophene provided by the present invention are in preferable ranges.
2) Examples 1-3 using a single water-soluble polythiophene, a single accelerator, and a single curing agent system, and examples 4-6 using a mixed water-soluble polythiophene, a mixed accelerator, and a mixed curing agent system, the gloss, water resistance, and corrosion resistance of the corrosion-resistant films obtained in examples 1-3 were all superior to the corresponding properties of the films in examples 4-6 by testing the properties of the corrosion-resistant films. Therefore, in the water-soluble polythiophene, the accelerator and the curing agent provided by the invention, the effect of singly using the water-soluble polythiophene, the accelerator and the curing agent is better than the effect of adopting the mixed water-soluble polythiophene, the mixed accelerator and the mixed curing agent, and the reason is probably that the electrostatic action and/or the hydrogen bonding action between the single water-soluble polythiophene and the novolac epoxy resin are stronger, and the accelerator and the curing agent have certain selectivity.
The anticorrosive paint and the preparation method thereof provided by the invention are described in detail, the formula and the preparation method of the anticorrosive paint are illustrated by using specific examples, and the description of the examples is only used for helping understanding the method and the core idea of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (15)
1. The preparation method of the anticorrosive paint is characterized by comprising the following steps of:
the method comprises the following steps: dispersing water-soluble polythiophene in a solvent to obtain a mixed solution A;
step two: adding phenolic epoxy resin into the mixed solution A, and stirring to obtain a mixed solution B;
step three: and adding a curing agent and an accelerator into the mixed solution B, and stirring to obtain the anticorrosive paint.
2. The production method according to claim 1, wherein the water-soluble polythiophene is at least one of poly 3- (3-hydroxypropyl-1-alkenyl) thiophene, poly [3- (1-ethoxy-2-N-methylimidazole) thiophene ] and poly [3- (1-propoxy-3-N, N-triethylamine) thiophene ].
3. The method according to claim 1 or 2, wherein in the first step, the concentration of the water-soluble polythiophene in the mixed solution a is 0.1 to 0.5 mg/mL.
4. The preparation method according to claim 1 or 2, characterized in that the mass ratio of the added amount of the water-soluble polythiophene to the added amount of the novolac epoxy resin is 0.5:100 to 5: 100.
5. The preparation method according to claim 1, wherein in the second step, after the novolac epoxy resin is added, ultrasonic treatment is performed at a temperature of 10-35 ℃, the ultrasonic frequency is 20-50 kHz, the ultrasonic time is 30-60 min, and the stirring process is performed after the ultrasonic treatment is completed.
6. The preparation method according to claim 1 or 5, wherein in the second step, the stirring time is 1-2 h, and the stirring speed is 100-1000 rpm; in the third step, the stirring time of the stirring is 15-45 min.
7. The method according to claim 1, wherein the accelerator is at least one of hexaimidazole cyclotriphosphazene, 1-benzyl-2-methylimidazole and boron trifluoride monoethylamine.
8. The preparation method according to claim 7, wherein the mass ratio of the addition amount of the accelerator to the novolac epoxy resin is 0.1:100 to 10: 100.
9. The method according to claim 1, wherein the curing agent is at least one of diaminodiphenyl sulfone, methylhexahydrophthalic anhydride and pentamethylene diisocyanate.
10. The preparation method according to claim 9, wherein the mass ratio of the addition amount of the curing agent to the novolac epoxy resin is 0.05:100 to 5: 100.
11. The production method according to claim 1, wherein the solvent is at least one of ethanol, butanol, and isopropanol.
12. An anticorrosive paint characterized by being produced by the production method according to any one of claims 1 to 11.
13. Use of an anticorrosive coating, characterized in that the anticorrosive coating according to claim 12 is formed on a substrate surface; and curing the anticorrosive coating to form an anticorrosive film on the surface of the base material.
14. The use according to claim 13, wherein the method for forming the anticorrosive coating on the surface of the substrate is dipping, and the curing method is drying in hot air at 50-75 ℃ for 10-25 min.
15. The use according to claim 13, wherein the substrate is a substrate surface coated with a Ni-W-P alloy.
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