CN-121975402-A - Anti-condensation ocean engineering anti-corrosion coating composition and preparation method thereof

Abstract

The application discloses an anti-condensation ocean engineering anti-corrosion coating composition and a preparation method thereof, wherein the anti-corrosion ocean engineering coating composition comprises, by mass, 100 parts of bisphenol A epoxy resin, 5-10 parts of an active diluent, 2-4 parts of a rust stabilizer, 30-40 parts of a flaky shielding pigment, 8-12 parts of a micro flaky filler, 1-1.5 parts of an adhesion promoter, 1-2 parts of a thixotropic agent and 7.2-10 parts of an anti-condensation agent, and the component B is a modified phenolic amine curing agent, wherein the anti-condensation agent comprises a porous carrier and mineral oil loaded in the porous carrier, and is prepared by the synergistic cooperation of a basic resin system and a functional auxiliary agent, and the anti-condensation agent with intelligent response and slow release characteristics is introduced, so that the effective prevention and control of continuous condensation corrosion are successfully realized, and the anti-condensation performance and long-service reliability of the coating composition under an ocean environment are remarkably improved.

Inventors

• SHI YOULIANG
• HAN SHUNYING
• ZHAO QIUPING
• Shi Haolong
• SHEN SUYING
• SHI JIANQUN
• HUANG BINGHUI
• Ju Zhefeng
• ZHOU FANG

Assignees

• 冶建新材料股份有限公司

Dates

Publication Date

20260505

Application Date

20260123

Claims (8)

1. 1. The marine engineering anticorrosive paint composition for preventing condensation is characterized by comprising A, B components; the component A is prepared from the following raw materials in parts by mass: 100 parts of bisphenol A type epoxy resin, 5-10 Parts of reactive diluent, 2-4 Parts of rust stabilizer, 30-40 Parts of flaky shielding pigment, 8-12 Parts of micro flake filler, 1 To 1.5 parts of adhesion promoter, 1-2 Parts of a thixotropic agent, 7.2-10 Parts of an anti-condensation agent; the component B is a modified phenolic aldehyde amine curing agent; the anti-coagulant includes a porous carrier and mineral oil supported within the porous carrier.
2. 2. The anti-condensation marine engineering anticorrosive paint composition according to claim 1, wherein the porous carrier is a porous resin having a particle diameter of 2+ -0.5 μm, and the mineral oil has a distillation range of 110-120 ℃.
3. 3. The anti-condensation marine engineering anticorrosive coating composition according to claim 2, wherein the mass ratio of the porous carrier to the mineral oil is 1 (0.1-0.2).
4. 4. A marine engineering corrosion protection coating composition according to claim 3, wherein the preparation method of the porous carrier comprises the following steps: S1, uniformly mixing a styrene monomer, divinylbenzene, liquid paraffin, benzoyl peroxide and methacrylic acid according to a mass ratio of 30:27:10:0.4:6 to obtain a first material; s2, uniformly mixing water, polyoxyethylene stearate and p-diphenol according to a mass ratio of 300:3:0.2 to obtain a second material; S3, heating the second material to 55 ℃, gradually dropwise adding the first material in a stirring state, wherein the dosage mass ratio of the first material to the second material is 305:200; S4, after the dripping is finished, gradually heating to 80 ℃, and reacting for 20 minutes at a temperature maintaining state to obtain a third material; And S5, filtering the third material to obtain a solid, repeatedly extracting the solid by using acetone to remove liquid paraffin, and filtering, drying, crushing and screening the particle size to obtain the porous carrier.
5. 5. The anti-condensation marine engineering corrosion protection coating composition according to claim 1, wherein the component a further comprises 0.2-0.4 parts of nano silver oxide.
6. 6. The anti-condensation ocean engineering corrosion-resistant coating composition according to claim 1, wherein the rust stabilizer is tannic acid-gallic acid compound, the flaky shielding pigment is non-floating mica iron oxide with a particle size of 150 meshes, and the superfine flaky filler is superfine sericite powder with a particle size of 1250 meshes.
7. 7. The anti-condensation marine engineering corrosion protection coating composition according to claim 1, wherein the adhesion promoter is an epoxy silane coupling agent.
8. 8. A method for preparing the anti-condensation marine engineering anticorrosive coating composition according to any one of claims 1 to 7, comprising the steps of preparing component a: mixing low-viscosity bisphenol A epoxy resin, an active diluent, an auxiliary agent and a part of solvent, and uniformly stirring at a low speed; Adding rust stabilizer, flaky shielding pigment, superfine flaky filler and anti-condensation agent and nano silver oxide when used, and stirring at high speed to fully infiltrate the materials; Grinding the obtained slurry until the fineness is less than or equal to 60 mu m; Adding thixotropic agent into the ground slurry, stirring at medium speed, and dispersing uniformly; adding the residual solvent to regulate the viscosity, and filtering to obtain a component A; the component B is a commercially available modified phenolic amine curing agent and is directly used.

Description

Anti-condensation ocean engineering anti-corrosion coating composition and preparation method thereof Technical Field The application relates to ocean engineering corrosion prevention, in particular to an anti-condensation ocean engineering corrosion prevention coating composition and a preparation method thereof. Background Seaside engineering equipment, such as port container cranes, ship unloaders, offshore wind towers, matched equipment and the like, is in a severe marine corrosion environment with high salinity, high humidity and strong ultraviolet irradiation for a long time. These devices are not only subject to direct rain wash and spray splatter, but are also subject to extremely severe electrochemical corrosion threats caused by continuous condensation. The condensation phenomenon is caused by that when the temperature of the metal surface is lower than the dew point temperature of the ambient air, the water vapor in the air is condensed into a liquid film on the metal surface. For seaside equipment, the steel structure is large in volume and high in heat capacity, and under the change of day and night temperature difference, the surface temperature is extremely easy to be lower than the dew point at night and in the early morning, so that salt vapor saturated in air is continuously condensed on the surface of the seaside equipment. Compared with intermittent rain washing, the condensate corrosion has the following remarkable characteristics, so that the hazard is more prominent: (1) The action is continuous, that is, condensed water can form a liquid electrolyte film which is uninterrupted for approximately 24 hours, and continuous conditions are provided for electrochemical corrosion; (2) The action part is extensive, namely, condensed water is not only on the outer surface of the equipment, but also is more easily formed in the equipment, box beam structures, bolt connection gaps, dead angles which are not easy to access and the like, and the areas are often difficult to maintain and dead areas; (3) The concentration of corrosive medium is that after evaporated seawater vapor condenses, a layer of concentrated chloride electrolyte is formed on the surface of metal, and the corrosiveness is extremely strong. Therefore, there is an urgent need in the art for a heavy corrosion protection primer specially designed for seaside engineering equipment, which not only has the traditional excellent corrosion protection performance, but also is required to solve the core pain point of continuous and high-concentration electrolyte corrosion caused by condensation water. The ideal primer can realize extremely high adhesive force under the condition of low surface treatment, effectively block condensate permeation and delay the time of a medium reaching a substrate by virtue of compact shielding property and optimized interface characteristic, thereby providing longer protection for equipment, remarkably prolonging the maintenance period and reducing the cost of the whole life cycle. Disclosure of Invention In order to reduce the corrosion influence of condensation on the ocean engineering anti-corrosion coating, the ocean engineering anti-corrosion coating composition for preventing condensation and the preparation method thereof are provided. The first object of the present invention is achieved by the following technical solutions: an anti-condensation marine engineering anticorrosive paint composition comprises A, B components; the component A is prepared from the following raw materials in parts by mass: 100 parts of bisphenol A type epoxy resin, 5-10 Parts of reactive diluent, 2-4 Parts of rust stabilizer, 30-40 Parts of flaky shielding pigment, 8-12 Parts of micro flake filler, 1 To 1.5 parts of adhesion promoter, 1-2 Parts of a thixotropic agent, 7.2 To 10 parts of anti-condensation agent, The component B is a modified phenolic aldehyde amine curing agent; the anti-coagulant includes a porous carrier and mineral oil supported within the porous carrier. By adopting the technical scheme, the bisphenol A epoxy resin is used as a continuous phase, the viscosity of the system is regulated by the reactive diluent, so that the coating has excellent permeability and wettability to the surface of a substrate, and the corrosion stabilizer can perform chelation reaction with the reactive corrosion component to generate an inert protective layer; the introduction of the anti-condensation agent realizes intelligent response type release control of mineral oil through the porous carrier, when condensation occurs on the surface of a paint film, the mineral oil is slowly released from the porous carrier under the drive of interfacial tension change, and a uniform super-hydrophobic oil film barrier is formed on the surface of the paint film, so that the dynamic response mechanism obviously reduces the wettability of water and effectively prevents water penetration; When the oil film on the surface is lost, mineral oi